工程科学学报2017，Vol.39Issue(7)：1036-1040,5.DOI:10.13374/j.issn2095-9389.2017.07.008
Ti6Al4V和Al2A12的扩散连接界面组织及力学性能
Microstructure and mechanical properties of Ti6Al4V and Al2A12 diffusion bonding interface
黄西娜 1郎利辉 1王刚 1段文1
作者信息
- 1. 北京航空航天大学机械工程及自动化学院, 北京 100191
- 折叠
摘要
Abstract
Hot isostatic pressing (HIP) was used to join two dissimilar aerospace alloys, namely Al2A12 and Ti6Al4V, for the first time.The microstructure and compositional evolutions were evaluated in the joint interface by scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction.The microhardness and shear strength tests were applied to study the mechanical properties of the joints.As a result, different intermetallic compounds (e.g., Al3Ti, TiAl2, and TiAl) form in the reaction layer of Ti/Al.The findings show that the microhardness value of the joint region is 163HV.The highest strength in the bonding zone is 23MPa, which exhibites a 17.9% improvement compared to that only with Cu coating, but is lower than the bonding strength with the interlayer.The fracture mode is brittle fracture due to overburden and void formation.The elements of dissimilar materials diffuse into each other during the HIP.Furthermore, various intermetallic compounds form at the interface, which affects the mechanical properties of the joints.关键词
热等静压/扩散连接/微观组织/剪切强度/硬度Key words
hot isostatic pressing/diffusion bonding/microstructure/shear strength/microhardness分类
矿业与冶金引用本文复制引用
黄西娜,郎利辉,王刚,段文..Ti6Al4V和Al2A12的扩散连接界面组织及力学性能[J].工程科学学报,2017,39(7):1036-1040,5.
