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Fatigue Crack Growth Behavior of Different Zones in an Annealed Automatic Gas Tungsten Arc Weld Joint of TA16 and TC4 titanium alloys

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Journal of Wuhan University of Technology(Materials Science) 2020年第6期35卷 1090-1097页

作者： SHAO Ling WU Sujun PENG Wenya DATYE Amit JU Hongbo LIU Ying Research Institute of Zhejiang University-Taizhou Zhejiang UniversityTaizhou 318000China School of Materials Science and Engineering Beihang UniversityBeijing 100191China AECC Hunan Aviation Powerplant Research Institute Zhuzhou 412000China Department of Mechanical Engineering&Materials Science Yale UniversityNew HavenCT 06511USA Key Laboratory of Advanced Welding Technology of Jiangsu Province Jiangsu University of Science and TechnologyZhenjiang 212003China Institute of Technology of Aircraft Engine Beijing Research Institute of Aviation EngineeringBeijing 100024China

Based on the investigated microstructure of different zones in the annealed automatic gas tungsten arc weld joint of TA16 and TC4 titanium alloys,the mechanical property of them was assessed under fatigue crack growth rate *** evaluation of fatigue crack growth rate,three points bending specimens were *** correlation between the range of stress intensity factor and crack growth rate was determined in different zones of the annealed weld *** crack growth rates were obviously different in different zones of weld joint of dissimilar titanium alloys,due to their different *** electron microscope examinations were conducted on the fracture surface in order to determine the relevant fracture mechanisms and crack growth mechanisms with respect to the details of microstructure.

关键词： dissimilar titanium alloys joining weld joint microstructure fatigue crack growth rate fracture

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Effect of heating time on bonding interface, atom diffusion and mechanical properties of dissimilar titanium joints produced by thermal self-compressing bonding

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Transactions of Nonferrous Metals Society of China 2018年第4期28卷 662-668页

作者： Yun-hua DENG Qiao GUAN Jun TAO Aeronautical Key Laboratory for Welding and joining Technologies AVIC Beijing Aeronautical Manufacturing Technology Research InstituteBeijing 100024China School of Mechanical Engineering and Automation Beihang UniversityBeijing 100191China

Solid-state bonding between pure titanium and Ti6Al4V(TC4)alloy was conducted by a new bonding method named as rigid restraint thermal self-compressing *** of heating time on bonding interface,atom diffusion and mechanical properties of the joints were *** show that atom diffusion between pure titanium and TC4 alloy significantly takes place during *** diffusion depths of Al and V in pure titanium side are increased with increasing heating *** to the enhancement of atom diffusion,bond quality of the bonding interface is improved along with the increase of heating *** heating time seems to have little effect on microhardness distribution across the ***,the tensile strength and ductility of the joint have close relation to heating *** heating time can improve the tensile strength and ductility of the joint,especially the *** the heating time increases to 450 s,solid-state joint with good combination of strength and ductility is attained.

关键词： dissimilar titanium alloys joining rigid restraint thermal self-compressing bonding atom diffusion,mechanical properties

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