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振动摩擦焊接的工艺条件对增强尼龙焊接头结构和力学性能的影响 被引量:3
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作者 杨兴成 张立娟 +2 位作者 武加文 李婷姨 李雅雅 《塑料工业》 CAS CSCD 北大核心 2016年第12期59-64,共6页
将30%玻璃纤维与尼龙66共混改性树脂(增强尼龙,PA66+30%GF)在一定注塑工艺条件下制备成用于焊接用的拉伸制件,经过振动摩擦焊接形成拉伸样条,通过二次元影像和万能试验机,研究振动摩擦焊接的工艺条件对增强尼龙焊接接头结构和... 将30%玻璃纤维与尼龙66共混改性树脂(增强尼龙,PA66+30%GF)在一定注塑工艺条件下制备成用于焊接用的拉伸制件,经过振动摩擦焊接形成拉伸样条,通过二次元影像和万能试验机,研究振动摩擦焊接的工艺条件对增强尼龙焊接接头结构和力学性能的影响。结果表明,振动摩擦焊接时的振幅、压力、深度和时间对焊接接头结构和力学性能有着明显的影响,保持时间与保持压力对焊接接头结构和力学性能几乎没有影响。在适当的焊接条件下,振动摩擦焊接振幅为0.6mm,压力为4.5MPa,深度为1.2mm,焊接时间为5—6s,保持时间2s,保持压力3.0MPa时,得到的焊接样条焊缝质量较好,其拉伸强度为56.0MPa,达到增强尼龙基材拉伸强度的32.9%(增强尼龙拉伸强度170MPa),达到母体尼龙基材拉伸强度的68.3%(尼龙基材拉伸强度为82MPa)。 展开更多
关键词 振动焊接 工艺条件 增强尼龙 力学性能 焊接头结构
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Microstructure and mechanical properties of Cu/Al joints brazed using(Cu,Ni,Zr,Er)-modified Al−Si filler alloys 被引量:1
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作者 Hua-xin LI Ying-dian FENG +7 位作者 Wei-jian SHEN Chuan-yang LÜ Wen-jian ZHENG Ying-he MA Gang MA Zhong-ping JIN Yan-ming HE Jian-guo YANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第11期3623-3634,共12页
To design a promising Al−Si filler alloy with a relatively low melting-point,good strength and plasticity for the Cu/Al joint,the Cu,Ni,Zr and Er elements were innovatively added to modify the traditional Al−Si eutect... To design a promising Al−Si filler alloy with a relatively low melting-point,good strength and plasticity for the Cu/Al joint,the Cu,Ni,Zr and Er elements were innovatively added to modify the traditional Al−Si eutectic filler.The microstructure and mechanical properties of filler alloys and Cu/Al joints were investigated.The result indicated that the Al−Si−Ni−Cu filler alloys mainly consisted of Al(s,s),Al_(2)(Cu,Ni)and Si(s,s).The Al−10Si−2Ni−6Cu filler alloy exhibited relatively low solidus(521℃)and liquidus(577℃)temperature,good tensile strength(305.8 MPa)and fracture elongation(8.5%).The corresponding Cu/Al joint brazed using Al−10Si−2Ni−6Cu filler was mainly composed of Al_(8)(Mn,Fe)_(2)Si,Al_(2)(Cu,Ni)3,Al(Cu,Ni),Al_(2)(Cu,Ni)and Al(s,s),yielding a shear strength of(90.3±10.7)MPa.The joint strength was further improved to(94.6±2.5)MPa when the joint was brazed using the Al−10Si−2Ni−6Cu−0.2Er−0.2Zr filler alloy.Consequently,the(Cu,Ni,Zr,Er)-modified Al−Si filler alloy was suitable for obtaining high-quality Cu/Al brazed joints. 展开更多
关键词 Cu/Al joint BRAZING Al−Si filler alloy interface structure joint strength
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Relationship between interfacial structure and property of steel-mushy Al-28Pb bonding pate 被引量:1
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作者 张鹏 杜云慧 +3 位作者 刘汉武 张君 曾大本 巴立民 《Journal of Central South University of Technology》 EI 2006年第1期12-16,共5页
The interfacial properties of steel-mushy Al-28Pb bonding plate with different interfacial structures, and the influence of ratio of Fe-Al compound at the interface on interfacial shear strength were investigated. The... The interfacial properties of steel-mushy Al-28Pb bonding plate with different interfacial structures, and the influence of ratio of Fe-Al compound at the interface on interfacial shear strength were investigated. The results show that there is a nonlinear relationship between the ratio of Fe-Al compound at the interface and the interfacial shear strength. When the ratio of Fe-Al compound at the interface is smaller than 71.4%, with the increase of the ratio of Fe-Al compound at the interface, the interfacial shear strength increases gradually; when the ratio of Fe-Al compound at the interface is larger than 71.4%, with the increase of the ratio of Fe-Al compound at the interface, the interfacial shear strength decreases continuously; when the ratio of Fe-Al compound at the interface is 71.4%, the largest interfacial shear strength 70.2MPa is obtained. 展开更多
关键词 interfacial structure ratio of Fe-Al compound interfacial shear strength
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TIG welding-brazing joint of aluminum to stainless steel with hot wire 被引量:1
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作者 何欢 林三宝 +2 位作者 陈哲 范成磊 杨春利 《China Welding》 EI CAS 2013年第3期25-30,共6页
TIG welding-brazing process with high frequency induction hot wire technology was presented to create joints between 5A06 aluminum alloy and SUS32! stainless steel using ER1100 filler wire with different temperature. ... TIG welding-brazing process with high frequency induction hot wire technology was presented to create joints between 5A06 aluminum alloy and SUS32! stainless steel using ER1100 filler wire with different temperature. The joints were evaluated by mechanical test and microstructural analyses. The welding procedure using hot fiUer wire (400 ℃ ) significantly increases strength stability by 71% and average value of tensile strength by 30. 8 % of the joints, compared with cold wire. The research of microstructures in interfaces and welded seams reveals that using 400 ℃ hot filler wire can decrease the thickness of intermetallic compounds ( IMCs ) from 6 to 3.5 txm approximately, which is the main reason of mechanical property improvement. 展开更多
关键词 aluminum alloy stainless steel WELDING-BRAZING hot wire high frequency induction INTERMETALLIC
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Classification of Ultrasonic Signs Pre-processed by Fourier Transform through Artificial Neural Network Using the Echo Pulse Technique for the Identification of Defects in Welded Joints of Structural Steel
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作者 Renata Torres Melo Sotero Maria Clea S. de Albuquerque +2 位作者 Francisco G. de Paula Claudia T. T. Farias Eduardo F. de Simas Filho 《Journal of Mechanics Engineering and Automation》 2015年第5期286-290,共5页
It is due to the need to ensure the security and integrity of equipment, that the non-destructive tests have been increasingly used in the industrial sector. Among these, the ultrasonic pulse echo technique is the mos... It is due to the need to ensure the security and integrity of equipment, that the non-destructive tests have been increasingly used in the industrial sector. Among these, the ultrasonic pulse echo technique is the most used in industry, mainly for its simplicity and efficiency. With one transducer only, it is possible to emit the ultrasonic and receive the echo pulse. The ANNs (artificial neural networks) are artificial intelligence techniques that, when properly trained, align themselves to inspection tests becoming a powerful tool in the detection and fault identification. In this work, the echo pulse technique was used to detect discontinuities in welds, where ANNs were fed from the information obtained by digital signal processing techniques (Fourier transform), to identify and classify three distinct classes of defects. Results showed that with the combination of feature extraction by Fourier transformation and classification with neural networks, it is possible to obtain an automatic defect detection system in welded joints with average efficiency. 展开更多
关键词 Non-destructive testing digital signal processing neural networks echo pulse ultrasound.
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