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高强韧铝合金AlSi10MnMg实现不同压铸力学性能的研究 被引量:1
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作者 李升 陈苏坚 《资源再生》 2018年第9期52-56,共5页
根据AlSi10MnMg中不同Mg含量和不同热处理状态以及热处理工艺参数,通过对实验数据的分析研究,细分出不同状态下压铸力学性能的具体范围,以便根据不同应用场景的力学性能要求,选择相应的生产和热处理工艺。
关键词 镁含量 热处理工艺 压铸力学性能
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压铸镁合金的应用现状及发展趋势 被引量:54
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作者 吕宜振 翟春泉 +2 位作者 王渠东 曾小勤 朱燕萍 《铸造》 CAS CSCD 北大核心 1998年第12期50-52,共3页
分析了压铸镁合金的压铸特性、成本因素及主要合金元素的作用,介绍了AZ、AM和AS系压铸镁合金的主要性能和应用,以及压铸镁合金的近期发展和研究动向。
关键词 压铸镁合金 压铸性能 镁合金 铸造
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添加微量镧对ZZnAl4Cu1Y合金显微组织及性能的影响 被引量:2
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作者 薛涛 吴健 +3 位作者 古文全 郭光平 于云峰 梁寅 《有色金属工程》 CAS CSCD 北大核心 2015年第1期1-5,共5页
研究添加微量稀土镧对ZZn Al4Cu1Y合金的显微组织、力学性能等的影响。结果表明,镧的加入能够细化ZZn Al4Cu1Y合金中的β相组织,改善合金压铸工艺性能,同时析出Zn-Al-Cu-La金属间化合物。随镧添加量的增加,Zn-Al-Cu-La金属间化合物由细... 研究添加微量稀土镧对ZZn Al4Cu1Y合金的显微组织、力学性能等的影响。结果表明,镧的加入能够细化ZZn Al4Cu1Y合金中的β相组织,改善合金压铸工艺性能,同时析出Zn-Al-Cu-La金属间化合物。随镧添加量的增加,Zn-Al-Cu-La金属间化合物由细小、弥散的球状形态转变为粗大的块状形态。综合考虑,添加0.06%镧对改善ZZn Al4Cu1Y合金各项性能较为有效。 展开更多
关键词 ZZnAl4Cu1Y合金 稀土镧 显微组织 力学性能 压铸工艺性能
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基于有限元技术的铸铝支架结构性能研究 被引量:2
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作者 赵俊男 于洋 +2 位作者 董有昌 池青山 王岩 《汽车实用技术》 2020年第19期169-173,共5页
文章以某款车型铸铝支架为研究对象,运用有限元技术对其结构进行了模态分析、动态响应分析、静态性能分析和压铸性能分析。后续制作样件,分别通过材料机械性能试验、孔隙率试验、静态破坏试验和疲劳性能试验验证。综上所述,确定结构性... 文章以某款车型铸铝支架为研究对象,运用有限元技术对其结构进行了模态分析、动态响应分析、静态性能分析和压铸性能分析。后续制作样件,分别通过材料机械性能试验、孔隙率试验、静态破坏试验和疲劳性能试验验证。综上所述,确定结构性能满足目标要求,验证软件仿真分析的准确性,保证产品质量,获得项目组认可。 展开更多
关键词 模态分析 铸铝支架 静态性能 压铸性能
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Microstructure evolution and tensile mechanical properties of thixoformed AZ61 magnesium alloy prepared by squeeze casting 被引量:3
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作者 陈添 解志文 +4 位作者 罗荘竹 杨钦 谭生 王赟姣 罗一旻 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第11期3421-3428,共8页
A novel process that combines squeeze casting with partial remelting to obtain AZ61 magnesium alloy with semi-solid microstructures was proposed. In this route, the squeeze casting was used to predeform the magnesium ... A novel process that combines squeeze casting with partial remelting to obtain AZ61 magnesium alloy with semi-solid microstructures was proposed. In this route, the squeeze casting was used to predeform the magnesium alloy billets to obtain small dendritic structures. During subsequent partial remelting, small dendritic structures transform into globular grains surrounded by liquid films. The results show that the squeeze casting AZ61 alloy after partial remelting produces more ideal, finer semi-solid microstructure compared with as-cast AZ61 alloy treated by the same isothermal holding conditions. Moreover, the mechanical properties of the thixoformed AZ61 alloy prepared by squeeze casting plus partial remelting are better than those of the thixoformed alloy prepared by conventional casting plus partial remelting. 展开更多
关键词 AZ61 magnesium alloy squeeze casting partial remelting mechanical properties
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Microstructures and properties of A356-10%SiC particle composite castings at different solidification pressures 被引量:6
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作者 董普云 赵海东 +1 位作者 陈飞帆 李俊文 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第8期2222-2228,共7页
A356-based metal matrix composites with 10% SiC particles of 10 rtm were fabricated by stir casting and direct squeeze casting process under applied pressures of 0.1 (gravity), 25, 50 and 75 MPa. The microstructures... A356-based metal matrix composites with 10% SiC particles of 10 rtm were fabricated by stir casting and direct squeeze casting process under applied pressures of 0.1 (gravity), 25, 50 and 75 MPa. The microstructures and mechanical properties of the as-cast and T6 heat-treated castings were investigated. The results show that as the applied pressures increase, the casting defects as particle-porosity clusters reduce and the incorporation between the particles and matrix can be improved. The tensile strength, hardness, and coefficients of thermal expansion (CTE) increase with the increase of the pressures. Compared with the as-cast composite castings, the tensile strength and hardness of the heat-treated casting are improved whereas CTEs tend to decrease in T6-treated condition. For the gravity cast composites, there are some particle-porosity clusters on the fracture surface, and the clusters are hardly detected on the fracture surface of the samples solidified at the external pressures. Different fracture behaviors are found between the composites solidified at the gravity and imposed pressures. 展开更多
关键词 metal matrix composites squeeze casting MICROSTRUCTURES mechanical properties
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Influence of filling parameters on fatigue properties of A357 alloy produced by counter pressure plaster mold casting 被引量:6
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作者 李强 郝启堂 +1 位作者 介万奇 Maijer DAAN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第5期1281-1285,共5页
The influence of filling parameters including pouring temperature, filling speed, boost pressure and synchronous pressure on the fatigue of A357 alloy produced by counter pressure plaster casting was studied. The Tagu... The influence of filling parameters including pouring temperature, filling speed, boost pressure and synchronous pressure on the fatigue of A357 alloy produced by counter pressure plaster casting was studied. The Taguchi method was used to investigate the relationship between the fatigue performance and filling parameters. The results show that filling speed is the most significant factor among the four parameters. Synchronous pressures is less influential on the fatigue life when the value of synchronous pressure is from 400 kPa to 600 kPa. 展开更多
关键词 counter pressure casting A357 alloy filing parameters fatigue properties
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Effect of applied pressure on microstructure and mechanical properties of Mg-Zn-Y quasicrystal-reinforced AZ91D magnesium matrix composites prepared by squeeze casting 被引量:6
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作者 杨玲 侯华 +1 位作者 赵宇宏 杨晓敏 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第12期3936-3943,共8页
The Mg-Zn-Y quasicrystal-reinforced AZ91 D magnesium matrix composites were prepared by squeeze casting process. The effects of applied pressure on microstructure and mechanical properties of the composites were inves... The Mg-Zn-Y quasicrystal-reinforced AZ91 D magnesium matrix composites were prepared by squeeze casting process. The effects of applied pressure on microstructure and mechanical properties of the composites were investigated. The results show that squeeze casting process is an effective method to refine the grain. The composites are mainly composed of α-Mg, β-Mg17Al12 and Mg3Zn6Y icosahedral quasicrystal phase(I-phase). With the increase of applied pressure, the contents of β-Mg17Al12 phase and Mg3Zn6 Y quasicrystal particles increase, further matrix grain refinement occurs and coarse dendritic α-Mg transforms into equiaxed grain structure. The composite exhibits the maximum ultimate tensile strength and elongation of 194.3 MPa and 9.2% respectively when the applied pressure is 100 MPa, and a lot of dimples appear on the tensile fractography. Strengthening mechanisms of quasicrystal-reinforced AZ91 D magnesium matrix composites are chiefly fine-grain strengthening and quasicrystal particles strengthening. 展开更多
关键词 magnesium matrix composite squeeze casting QUASICRYSTAL microstructure mechanical properties
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Mechanical properties and microstructures of Al alloy tensile samples produced by serpentine channel pouring rheo-diecasting process 被引量:8
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作者 陈正周 毛卫民 吴宗闯 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第7期1473-1479,共7页
An innovative one-step semi-solid processing technique of A356 Al alloy,the serpentine channel pouring rheo-diecasting process (SCRC),was explored.The mechanical properties and microstructures of the tensile samples... An innovative one-step semi-solid processing technique of A356 Al alloy,the serpentine channel pouring rheo-diecasting process (SCRC),was explored.The mechanical properties and microstructures of the tensile samples made by the SCRC technique were tested in the as-cast and T6 heat treatment conditions.The experimental results show that the as-cast ultimate tensile strength can reach about 250MPa and the elongation is 8.6%?13.2%.The ultimate tensile strength can increase approximately 30% higher than that of the as-cast one but there is some slight sacrifice of the plasticity after T6 heat treatment.Under these experimental conditions,the semi-solid A356 Al alloy slurry with primary α1(Al) grains,which have the shape factor of 0.78?0.89 and the grain diameter of 35?45μm,can be prepared by the serpentine channel pouring process.The primary α2(Al) grains are very fine during the secondary solidification stage.Compared with the conventional HPDC process,the SCRC process can improve the microstructures and mechanical properties of the tensile test samples.The advantages of the SCRC process include easily incorporating with an existing HPDC machine,cancelling the preservation and transportation process of the semi-solid alloy slurry,and a higher cost performance. 展开更多
关键词 RHEO-DIECASTING A356 aluminum alloy serpentine channel mechanical properties microstructure
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Microstructure and mechanical properties of Mg-6Gd-3Y-0.5Zr alloy processed by high-vacuum die-casting 被引量:4
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作者 李胜勇 李德江 +1 位作者 曾小勤 丁文江 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第12期3769-3776,共8页
GW63K (Mg-6Gd-3Y-0.5Zr) magnesium alloys were prepared successfully by high-vacuum die-casting. Effects of fast shot speed and vacuum level on the grain size and mechanical properties of this alloy were studied. Mic... GW63K (Mg-6Gd-3Y-0.5Zr) magnesium alloys were prepared successfully by high-vacuum die-casting. Effects of fast shot speed and vacuum level on the grain size and mechanical properties of this alloy were studied. Microstructure of the alloys was analyzed by SEM, EDX and optical microscope (OM). The effect of heat treatment on high vacuum die-casting (HVDC) GW63K alloy was also studied. The results indicate that with the increase of fast velocity, the tensile yield strength hardly changes, but the elongation first increases, then decreases. The optimum heat treatment process is solution treatment at 748 K for 2 h and aging at 473 K for 80 h. Under this condition, GW63K magnesium alloy exhibits a maximum tensile strength and elongation of 308 MPa and 9.45%. There is significant correlation between ductility and the presence of external solidified cells (ESCs). The as-cast GW63K alloy consists ofα-Mg and Mg24(Gd,Y)5 particles. After heat treatment, Gd and Y atoms dissolve intoα-Mg matrix. 展开更多
关键词 Mg-Gd-Y-Zr alloy high vacuum die-casting mechanical properties heat treatment
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Microstructure and properties of Al-0.70Fe-0.24Cu alloy conductor prepared by horizontal continuous casting and subsequent continuous extrusion forming 被引量:6
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作者 张晓苑 张辉 +1 位作者 孔祥鑫 傅定发 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第6期1763-1769,共7页
A novel process for manufacturing A1-0.70Fe-0.24Cu alloy conductor was proposed, which includes horizontal continuous casting and subsequent continuous extrusion forming (Conform). The mechanical properties, electri... A novel process for manufacturing A1-0.70Fe-0.24Cu alloy conductor was proposed, which includes horizontal continuous casting and subsequent continuous extrusion forming (Conform). The mechanical properties, electrical conductivity and the compressed creep behaviour of the alloy were studied. The results indicate that the Conform process induces obvious grain refinement, strain-induced precipitation of AI7CuzFe phase and the transformation of crystal orientation distribution. The processed alloy has good comprehensive mechanical properties and electrical conductivity. Moreover, a better creep resistance under the conditions of 90 ~C and 76 MPa is shown compared with pure A1 and annealed copper, and the relationship between primary creep strain and time may comply with the logarithmic law. The enhanced properties are attributed to the grain refinement as well as the fine and homogeneously distributed thermally stable A1Fe and A17Cu2Fe precipitation phases. 展开更多
关键词 A1-0.70Fe-0.24Cu alloy horizontal continuous casting continuous extrusion forming MICROSTRUCTURE PROPERTY
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Microstructure evolution and mechanical properties of rheo-processed ADC12 alloy 被引量:3
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作者 Zhao-hua HU Xiang PENG +4 位作者 Guo-hua WU Da-qiang CHENG Wen-cai LIU Liang ZHANG Wen-jiang DING 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第12期3070-3080,共11页
Microstructure evolution and mechanical properties of the rheo-processed ADC12 alloy were investigated by means ofoptical microscopy, X-ray diffraction and scanning electron microscopy. Primary dendritic Al of rheo-ca... Microstructure evolution and mechanical properties of the rheo-processed ADC12 alloy were investigated by means ofoptical microscopy, X-ray diffraction and scanning electron microscopy. Primary dendritic Al of rheo-casting (RC) andrheo-diecasting (RDC) ADC12 alloys are sheared off. The average size, as well as solid fraction of the primary Al increase withdescending pouring temperature. The mechanical properties of alloys are strengthened by rheo-processing. Ultimate tensile strengthsof RC samples increase with the decrease of the pouring temperature, and reach the maximum in the range from 580 to 600 °C. Atpouring temperature of 595 °C, the RDC sample obtains the best ultimate tensile strength and elongation. Great reductions onporosity and primary Al globularization are crucial to the mechanical properties. Relationships of the primary Al size and yield stressare depicted with Hall?Petch equation. 展开更多
关键词 aluminum alloy CASTING rheo-processing rheo-casting RHEO-DIECASTING mechanical properties
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Influence of Ce addition on microstructure and mechanical properties of high pressure die cast AM50 magnesium alloy 被引量:8
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作者 Faruk MERT Ahmet ZDEMIR +1 位作者 Karl Ulrich KAINER Norbert HORT 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第1期66-72,共7页
The influence of Ce addition on the microstructure and mechanical properties of AM50 magnesium alloy was investigated to improve its mechanical properties.The results show that the addition of Ce to AM50 alloy results... The influence of Ce addition on the microstructure and mechanical properties of AM50 magnesium alloy was investigated to improve its mechanical properties.The results show that the addition of Ce to AM50 alloy results in the grain refinement and the mechanical properties of the Ce-modified AM50 at room and elevated temperatures are remarkably improved.AM50 magnesium alloy containing 1% Ce(mass fraction) shows better refinement and mechanical properties compared with the AM50 magnesium alloy with 0.5% Ce and even AM50 alloy without any Ce. 展开更多
关键词 AM50 magnesium alloy CERIUM die casting microstructure mechanical properties
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Microstructure,mechanical properties and corrosion behavior of Al-Si-Cu-Zn-X(X=Bi,Sb,Sr) die cast alloy 被引量:15
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作者 Saeed FARAHANY Ali OURDJ1NI Hamid Reza BAKHSHESHI-RAD 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第1期28-38,共11页
The microstructure evolution, mechanical and corrosion properties of Al-11Si-2Cu-0.8Zn die cast alloy treated with Bi, Sb and Sr additions were investigated. The results of mechanical testing showed that all additions... The microstructure evolution, mechanical and corrosion properties of Al-11Si-2Cu-0.8Zn die cast alloy treated with Bi, Sb and Sr additions were investigated. The results of mechanical testing showed that all additions increased impact toughness, ultimate tensile strength, and elongation of the alloy as a result of change in eutectic Si morphology. The analysis of fracture surfaces revealed that with addition of Sr and to lesser extent Bi and Sb, the alloy exhibited a predominantly ductile fracture rather than quasi-cleavage brittle fracture. Moreover, with the additions of Sr, Bi and Sb, the quality index increased to 164.7 MPa, 156.3 MPa and 152.6 MPa respectively from 102 MPa for the base alloy. Polarization corrosion tests conducted in sodium chloride solution showed that the corrosion potential shifted to more negative values with additions of Sb, Bi and Sr, respectively. Corrosion immersion tests also revealed that the element additions have a detrimental effect on the corrosion rate of alloys, due to the increase of boundaries between the Al and eutectic Si phases. 展开更多
关键词 aluminium die cast alloy melt treatment mechanical properties FRACTURE corrosion
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New technique for preparing A356 alloy semisolid slurry and its rheo-diecast microstructure and properties 被引量:9
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作者 Ming-fan QI Yong-lin KANG +2 位作者 Yu-zhao XU Jing-yuan LI Ai-sen LIU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第7期1868-1884,共17页
A new technique for preparing semisolid slurry,namely,distributary-confluence runner(DCR),was combined with die-casting(DC)to conduct rheological die-casting(R-DC)of A356 alloy.The mechanism of DCR for semisolid slurr... A new technique for preparing semisolid slurry,namely,distributary-confluence runner(DCR),was combined with die-casting(DC)to conduct rheological die-casting(R-DC)of A356 alloy.The mechanism of DCR for semisolid slurry preparation was determined via numerical simulations and experiments.The microstructure and mechanical properties of A356 alloys prepared via DC and R-DC were studied.High-quality slurry containing numerous primary α-Al(α1-Al)with an average size of 49μm and a shape factor of 0.81 could be prepared via DCR.Simulation results indicated that the unique flow state and physical field changes during slurry preparation were conducive to accelerating the uniformity of melt temperature and composition fields,nucleation exfoliation,and spherical growth.Compared with the alloy prepared via DC,the tensile strength,yield strength,and elongation of A356 alloy prepared via R-DC increased by 19%,15%,and 107%,respectively. 展开更多
关键词 semisolid slurry A356 alloy distributary-confluence runner rheological die-casting microstructure tensile properties
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Microstructure and mechanical properties of melt-conditioned high-pressure die-cast Mg-Al-Ca alloy 被引量:1
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作者 梁松茂 张华伟 +3 位作者 夏明许 陈荣石 韩恩厚 FAN Zhong-yun 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第7期1205-1211,共7页
A new shape casting process,melt-conditioned high-pressure die-casting(MC-HPDC) was developed.In this process,liquid metal was conditioned under intensively forced convection provided by melt conditioning with advance... A new shape casting process,melt-conditioned high-pressure die-casting(MC-HPDC) was developed.In this process,liquid metal was conditioned under intensively forced convection provided by melt conditioning with advanced shear technology(MCAST) unit before being transferred to a conventional cold chamber high-pressure die-casting(HPDC) machine for shape casting. The effect of melt conditioning was investigated,which was carried out both above and below the liquidus of the alloy,on the microstructure and properties of a Mg-Al-Ca alloy(AZ91D+2%Ca(mass fraction) ,named as AZX912) .The results show that many coarse externally-solidified crystals(ESCs) can be observed in the centre of conventional HPDC samples,and hot tearing occurs at the inter-dendritic region because of the lack of feeding.With the melting conditioning,the MC-HPDC samples not only have considerably refined size of ESCs but also have significantly reduced cast defects,thus provide superior mechanical properties to conventional HPDC castings.The solidification behaviour of the alloy under different processing routes was also discussed. 展开更多
关键词 Mg alloy Mg-Al-Ca alloy melt conditioning grain refinement SOLIDIFICATION die casting
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Influence of rheo-diecasting processing parameters on microstructure and mechanical properties of hypereutectic Al-30%Si alloy 被引量:5
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作者 Zhi-kai ZHENG Yong-jian JI +2 位作者 Wei-min MAO Rui YUE Zhi-yong LIU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第6期1264-1272,共9页
The effects of pouring temperature,vibration frequency,and the number of curves in a serpentine channel,on themicrostructure and mechanical properties of Al-30%Si alloy processed by rheo-diecasting(RDC)were investigat... The effects of pouring temperature,vibration frequency,and the number of curves in a serpentine channel,on themicrostructure and mechanical properties of Al-30%Si alloy processed by rheo-diecasting(RDC)were investigated.The semisolidAl-30%Si alloy slurry was prepared by vibration serpentine channel pouring(VSCP)process in the RDC process.The results showthat the pouring temperature,the vibration frequency,and the number of the curves strongly affect the microstructure and mechanicalproperties of Al-30%Si alloy.Under experimental conditions of a pouring temperature of850°C,a twelve-curve copper channel anda vibration frequency of80Hz,the primary Si grains are refined into fine compact grains with average grain size of about24.6μm inthe RDC samples assisted with VSCP.Moreover,the ultimate tensile strength(UTS),elongation and hardness of the RDC sample are296MPa,0.87%and HB155,respectively.It is concluded that the VSCP process can effectively refine the primary Si grains.Therefinement of primary Si grains is the major cause for the improvement of the mechanical properties of the RDC sample. 展开更多
关键词 hypereutectic Al-Si alloy primary Si vibration serpentine channel pouring process RHEO-DIECASTING microstructure mechanical properties
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Effects of combined addition of Y and Ca on microstructure and mechanical properties of die casting AZ91 alloy 被引量:4
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作者 王峰 王越 +2 位作者 毛萍丽 于宝义 郭全英 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第B07期311-317,共7页
A series of die casting heat-resistant magnesium alloys based on Mg-Al system were developed for automotive application by adding Y and various amounts of Ca. The mechanical properties and microstructures of die casti... A series of die casting heat-resistant magnesium alloys based on Mg-Al system were developed for automotive application by adding Y and various amounts of Ca. The mechanical properties and microstructures of die casting AZ91 alloy with combined addition of Y and Ca were investigated by optical microscopy, scanning electronic microscopy, X-ray diffractometry and mechanical property test. The results show that the combined addition of Y and Ca can refine the as-die-cast microstructure, result in the formation of Al2Ca phase and Al2Y phase, and inhibit the precipitation of Mg17Al12 phase. The combined addition of Y and small amount of Ca has little influence on the ambient temperature tensile properties, but increasing the content of Ca can improve significantly the tensile strength at both ambient and elevated temperatures. It is found that for AZ91-1Y-xCa alloy, the hardness and the elevated temperature tensile strength increase, while the elongation decreases with increasing the addition of Ca. The mechanism of mechanical properties improvement caused by the combined addition of Y and Ca was also discussed. 展开更多
关键词 die casting magnesium alloy AZ91Mg alloy YTTRIUM CALCIUM microstructure tensile property
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Microstructure evolution of modified die-cast AlSi10MnMg alloy during solution treatment and its effect on mechanical properties 被引量:9
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作者 Zi-hao YUAN Zhi-peng GUO Shou-mei XIONG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第5期919-930,共12页
To optimize the solution treatment process of a modified high-pressure die-cast AlSi10MnMg alloy, the influence of the solution treatment on the microstructure, mechanical properties and fracture mechanisms was studie... To optimize the solution treatment process of a modified high-pressure die-cast AlSi10MnMg alloy, the influence of the solution treatment on the microstructure, mechanical properties and fracture mechanisms was studied using OM, SEM, EBSD and tensile test. The experimental results suggest that the solution treatment could be completed in a shorter time at a temperature much lower than the conventional practice. Surface blistering could be avoided and substantial strengthening effect could be achieved in the following aging process. Prolonging solution treatment time and elevating solution temperature would be meaningless or even harmful. The rapid evolution of eutectic silicon during solution treatment, especially at the early stage, affected the way of interaction among α-Al grains during plastic deformation, and changed the ultimate mechanical properties and fracture mode. 展开更多
关键词 AlSi10MnMg alloy die casting solution treatment microstructure evolution mechanical properties process optimization
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Microstructure and mechanical properties of extruded Al/Al_2O_3 composites fabricated by stir-casting process 被引量:1
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作者 H.R.EZATPOUR1 M.TORABIPARIZI S.A.SAJJADI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第5期1262-1268,共7页
A novel two step mixing method including injection of particles into the melt by inert gas and stirring was used to prepare aluminum matrix composites (AMCs) reinforced with Al2O3 particles. Different mass fractions... A novel two step mixing method including injection of particles into the melt by inert gas and stirring was used to prepare aluminum matrix composites (AMCs) reinforced with Al2O3 particles. Different mass fractions of micro alumina particles were injected into the melt under stirring speed of 300 r/min. Then the samples were extruded with ratios of 1.77 or 1.56. The microstructure observation showed that application of the injection and extrusion processes led to a uniform distribution of particles in the matrix. The density measurements showed that the porosity in the composites increased with increasing the mass fraction of Al2O3 and stirring speed and decreased by extrusion process. Hardness, yield and ultimate tensile strengths of the extruded composites increased with increasing the particle mass fraction to 7%, while for the composites without extrusion they increased with particle mass fraction to 5%. 展开更多
关键词 Al/Al2O3 composite stir-casting extrusion microstructure mechanical properties
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