摘要
以TC4钛合金为研究对象,采用扩散钎焊方法制备钛合金多层板,对多层板的界面组织、连接强度及失效断口形貌等进行测试分析,以供钛合金薄板的连接提供技术参考。研究证明:扩散钎焊界面为针状魏氏体组织,界面无化合物形成;室温下界面强度达到母材强度的94%,350℃下界面平均强度为690 MPa,延伸率在11%以上;界面魏氏体组织成为裂纹扩展速率增大和界面失效的主要因素。
To provide reference for titanium alloy sheet connection technology, the muhilayer TCA alloy was made by diffusion welding. The interface compositions, interface strength and the fracture were analyzed. The results showed that the interface strength was up to 94% of that of the matrix at room temperature. It was 690 MPa in average at 350 ℃ with tensile elongation as 11%. The main factor of the fracture was ascribed to the extended area with coarse widmanstaten structure, which induced the incensement of the crack extending
出处
《失效分析与预防》
2013年第3期136-140,166,共6页
Failure Analysis and Prevention
关键词
钛合金
扩散钎焊
强度
断口
titantium alloys
diffusion welding
strength
fracture
