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Vacuum diffusion bonding of Ti_(2)AlNb alloy and TC4 alloy 被引量:6
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作者 guang-jie feng Yan WEI +3 位作者 Bing-xu HU Yi-feng WANG De-an DENG Xiu-xia YANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第9期2677-2686,共10页
The Ti_(2)AlNb alloy was joined with TC4 alloy by vacuum diffusion bonding.The relationship between bonding parameters,and joint microstructure and shear strength was investigated.The results indicated that the diffus... The Ti_(2)AlNb alloy was joined with TC4 alloy by vacuum diffusion bonding.The relationship between bonding parameters,and joint microstructure and shear strength was investigated.The results indicated that the diffusion of Al,Ti,Nb and V elements across bonding interface led to the formation of three reaction layers:B2/βlayer andα2 layer on the TC4 side,andα2+B2/βlayer on the Ti_(2)AlNb side.The bonding temperature determined the atomic activity,thus controlling the growth of reaction layers and influencing the shear strength of the joint.When the Ti_(2)AlNb alloy and TC4 alloy were bonded at 950℃for 30 min under 10 MPa,the shear strength of the joint reached the maximum of 467 MPa.The analysis on the fracture morphology showed that the fracture occurred within the B2/βlayer and the fracture model was ductile rupture.Meanwhile,the formation mechanism of the Ti_(2)AlNb/TC4 joint was discussed in depth. 展开更多
关键词 Ti_(2)AlNb alloy TC4 alloy diffusion bonding interfacial reaction shear strength formation mechanism
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Laser-induced combustion joining of C_(f)/Al composites and TC4 alloy
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作者 guang-jie feng Zhuo-ran LI +2 位作者 Peng HE Lei SHEN Zhi ZHOU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第2期461-471,共11页
The C_(f)/Al composites were joined to the TC4 alloy via the laser-induced combustion joining method.The exothermic reaction of the interlayer provided the required energy for the joining process.By combining the theo... The C_(f)/Al composites were joined to the TC4 alloy via the laser-induced combustion joining method.The exothermic reaction of the interlayer provided the required energy for the joining process.By combining the theoretical calculation and experiment,the chemical composition of the Ni−Al−Zr interlayer was designed.The microstructure and mechanical properties of the joint were investigated.The results show that the addition of Zr slightly weakened the combustion reaction of exothermic interlayer but played a key role in the successful joining.Ni−Al−Zr interlayer reacted with substrates,forming a TiAl_(3)layer adjacent to TC4 alloy and NiAl_(3),Ni_(2)Al_(3)layers adjacent to the C_(f)/Al composites.Zr content dominated the microstructure and shear strength of the joint.When the Zr content was 5 wt.%under the joining pressure of 2 MPa,the joint had a maximum shear strength of 19.8 MPa. 展开更多
关键词 C_(f)/Al composites TC4 alloy combustion joining interfacial microstructure shear strength
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Microstructure and formation mechanism of SHS joining between C_f/Al composites and TiAl intermetallic with Al–Ni–CuO interlayer 被引量:4
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作者 Zhuo-Ran Li guang-jie feng +1 位作者 Kai Xu Xiang-Long Zhang 《Rare Metals》 SCIE EI CAS CSCD 2015年第1期17-21,共5页
In this study, it was reported a novel approach for joining Cf/A1 composites and TiA1 intermetallic by self- propagating high-temperature synthesis (SHS). Mixed powders of 14A1-2Ni-3CuO were used as the SHS inter- l... In this study, it was reported a novel approach for joining Cf/A1 composites and TiA1 intermetallic by self- propagating high-temperature synthesis (SHS). Mixed powders of 14A1-2Ni-3CuO were used as the SHS inter- layer, and differential thermal analysis test of A1-Ni-CuO interlayer was conducted to analyze the exothermic char- acteristic. Sound joint was got by SHS joining under the conditions of 600 ℃, 30 min, and 5 MPa. The joint was characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffrac- tion (XRD). TiA13 and NiA13 are, respectively, formed in the TiA1/interlayer and Cf/A1/interlayer interfaces. Reac- tion products of Ni2Al3, NiAl3, A1203, and Cu were observed in the interlayer. And the formation mechanism of SHS joining was investigated. 展开更多
关键词 SHS Joining MICROSTRUCTURE Formationmechanism A1-Ni-CuO interlayer
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Microstructure evolution and formation mechanism of laser-ignited SHS joining between Cf/Al composites and TiAl alloys with Ni-Al-Ti interlayer 被引量:2
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作者 guang-jie feng Zhuo-Ran Li +1 位作者 Shi-Cheng feng Wei-Jie Zhang 《Rare Metals》 SCIE EI CAS CSCD 2017年第9期746-752,共7页
In this study, Cf/Al composites and TiAl alloys were joined by a new method named laser-ignited selfpropagating synthesis(SHS). Mixed powders of 63.0Ni-31.9Al-5.1Ti(wt%) were used as joining interlayer.Perfect joi... In this study, Cf/Al composites and TiAl alloys were joined by a new method named laser-ignited selfpropagating synthesis(SHS). Mixed powders of 63.0Ni-31.9Al-5.1Ti(wt%) were used as joining interlayer.Perfect joint was got. The microstructure evolution and formation mechanism of the SHS joint were investigated by scanning electron microscopy(SEM), energy-dispersive spectroscopy(EDS) and X-ray diffraction(XRD). Results show that localized melting occurs on both sides. One γ-Ni(0.35)Al(0.30)Ti(0.35) and two Ni-Al reaction layers form,respectively, in the TiAl/interlayer and Cf/Al/interlayer interfaces. The combustion of Ni-Al-Ti interlayer begins with the sharp reaction of Ni and Al. The interlayer product is a eutectic organization of NiAl and Al-rich γ. 展开更多
关键词 SHS Joining MICROSTRUCTURE Formationmechanism Ni-Al-Ti interlayer
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Self-propagating synthesis joining of C_(f)/Al composites and TC4 alloy using AgCu filler with Ni-Al-Zr interlayer 被引量:1
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作者 Lei Shen Zhuo-Ran Li +3 位作者 guang-jie feng Shu-Ye Zhang Zhi Zhou Peng He 《Rare Metals》 CSCD 2021年第7期1817-1824,共8页
The successful joining of carbon fiber-reinforced aluminum matrix(C_(f)/Al)composites and TC4 alloy can produce composite structure and meet the demands of lightweight in aerospace field.Up to now,few experimental res... The successful joining of carbon fiber-reinforced aluminum matrix(C_(f)/Al)composites and TC4 alloy can produce composite structure and meet the demands of lightweight in aerospace field.Up to now,few experimental researches have been reported on the joining of C_(f)/Al composites and TC4 alloy.In this study,the AgCu foils and Ni-Al-Zr compact were designed for the self-propagating high-temperature synthesis joining of these two materials.C_(f)/Al composites were joined with a reactive Ti plated on its joining surface.The typical microstructure of TC4/(AgCu/Ni-Al-Zr/AgCu)/Ti/C_(f)/Al joint was analyzed,and the effects of joining condition on microstructural evolution of the SHS joint were investigated.A thin reaction layer of Ni-Al-Ti intermetallic compounds was formed adjacent to the TC4 alloy.As a result,AgCu foils could reduce the effect of reaction heat on the substrates and improve the joint shear strength.When the thickness of AgCu foils reaches 150 lm,the Ni-Al-Zr interlayer mainly acts as auxiliary heat source.High joining pressure caused the active elements to diffuse into C_(f)/Al composites and weakened the shear strength of the joint.Finally,the joint shear strength could reach 36.4 MPa when the AgCu foils were 50 lm and the joining pressure was 2 MPa. 展开更多
关键词 Cf/Al composites TC4 alloy Self-propagating high-temperature synthesis joining MICROSTRUCTURE Shear strength
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Effects of Joining Conditions on Microstructure and Mechanical Properties of C_f/Al Composites and TiAl Alloy Combustion Synthesis Joints
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作者 guang-jie feng Zhuo-Ran Li +1 位作者 Rui-Hua Liu Shi-Cheng feng 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2015年第4期405-413,共9页
Cf/Al composites and TiAl alloy were joined by combustion synthesis in different joining conditions. Effects of additive Cu, joining temperature and holding time on joint microstructure and shear strength were charact... Cf/Al composites and TiAl alloy were joined by combustion synthesis in different joining conditions. Effects of additive Cu, joining temperature and holding time on joint microstructure and shear strength were characterized by employing DTA, SEM, EDS, XRD and shear test. Results show that the additive Cu in the Ti-Al-C interlayer could significantly decrease the reaction temperature owing to the emergence of Al--Cu eutectic liquid. Reaction degree of the interlayer was influenced by joining temperature and holding time. Due to the barrier action of formed TiAl3 layer, reaction rate of Ti and Al was determined by the atoms diffusion. The reaction between Ti and AI was more sensitive to the joining temperature rather the holding time. The joints shear strength was influenced by joining condition directly. The maximum shear strength of CS joints was 25.89 MPa at 600 ℃ for 30 rain under 5 MPa. Interface evolution mechanism of the CS joint was analyzed based on the experimental results and phase diagram. 展开更多
关键词 C/Al composite TiAl alloy Combustion synthesis Interface microstructure Formationmechanism
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