钛合金及其扩散焊疲劳特性研究进展

李细锋, 李天乐, 安大勇, 吴会平, 陈劼实, 陈军

Research Progress of Titanium Alloys and Their Diffusion Bonding Fatigue Characteristics

LI Xifeng, LI Tianle, AN Dayong, WU Huiping, CHEN Jieshi, CHEN Jun

图4 置氢的Ti2AlNb/TC4异种钛合金扩散焊界面SEM微观组织表征、EDS分析与接头强度[24]

Fig.4 Joint microstructures and element distributions by SEM and EDS as well as shear strength of hydrogenated Ti2AlNb/TC4 alloys by diffusion bonding[24] (a) overall joint microstructure (b) corresponding element distribution across the interface (Inset shows the local joint microstructure. I, III—β phase layers; II—α phase layer; IV—α + β phase layer; V—B2 + O phase layer) (c) fracture morphologies of hydrogenated sample (cleavage rupture marked by black rectangle) (d) variation of joint shear strength with diffusion zone width (microstructural observations of unhydrogenated sample in the inset)