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	Bending properties and fracture behavior of Ti-23Al-17Nb alloy laser beam welding joints
	Wang Guoqing ; Wu Aiping ; Zou Guisheng ; Zhao Yue ; Chen Qiang ; Ren Jialie
	2010-10-12 ; 2010-10-12
关键词	Practical Experimental/ aerospace materials aluminium alloys bending ductility fracture laser beam welding mechanical testing niobium alloys surface cracks titanium alloys welds/ fracture behavior alloy laser beam welding joints high temperature structural material aerospace fields microstructures mechanical properties longitudinal three-point bending tests bending ductility crack distribution fracture surface crack inducing strain fracturing strain columnar crystal grain fractography analysis TiAlNb/ A6825 Mechanical and acoustical properties of solid surfaces and interfaces A8170 Materials testing A6480G Microstructure A8190 Other topics in materials science A4262A Laser materials processing A6220M Fatigue, brittleness, fracture, and cracks A8140N Fatigue, embrittlement, and fracture A6220F Deformation and plasticity A8140L Deformation, plasticity and creep B4360B Laser materials processing E1710 Engineering materials E3650C Aerospace industry E1630 Testing E1520E Joining processes and welding E2180E Fracture mechanics and hardness (mechanical engineering) E2180B Plasticity (mechanical engineering)/ TiAlNb/ss Al/ss Nb/ss Ti/ss
中文摘要	Ti-23AI-17Nb alloy is an important high temperature structural material used in the space and aerospace fields. Welding of this alloy is an indispensable processing method, so the microstructures and mechanical properties of these welded joints must be studied to improve the welds. Longitudinal three-point bending tests were conducted to measure the bending ductility of laser beam welded joints. The crack distribution and fracture surface were investigated to further analyze the fracture behavior. The results indicate that the bending ductility decreases as the heat input by the laser beam welding increases. The crack inducing strain reaches 4.24%, while the fracturing strain exceeds 5% when the heat input is below 316 J/cm. If the columnar crystal grain of the weld metal exhibits a uniform orientation, the bending ductility is worse. The fractography analysis shows that the cracking propagates transgranularly and the fracture surface has a cleavage mode.
语种	英语
出版者	Tsinghua University Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/80482]
专题	清华大学
推荐引用方式 GB/T 7714	Wang Guoqing,Wu Aiping,Zou Guisheng,et al. Bending properties and fracture behavior of Ti-23Al-17Nb alloy laser beam welding joints[J],2010, 2010.
APA	Wang Guoqing,Wu Aiping,Zou Guisheng,Zhao Yue,Chen Qiang,&Ren Jialie.(2010).Bending properties and fracture behavior of Ti-23Al-17Nb alloy laser beam welding joints..
MLA	Wang Guoqing,et al."Bending properties and fracture behavior of Ti-23Al-17Nb alloy laser beam welding joints".(2010).

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