摘要
针对SPF/DB后TC4钛合金进行固溶时效处理,采用金相组织观察和单向力学性能测试方法,研究热处理参数对超塑成形/扩散连接后钛合金显微组织和力学性能的影响。结果表明,TC4钛合金热处理后可以获得初生α相和细针状α+β的混合组织。随着固溶温度的提高,初生α相含量较少,屈服强度和抗拉强度先减小后增大;随着时效温度的提高,针状α+β晶粒尺寸逐渐增大,抗拉强度逐渐减小,塑性逐渐提高。
Influence of solution and aging treatment parameters on microstructure and mechanical properties of TC4 titanium alloy after SPF/DB is investi- gated through microstructure observation and mechanical properties test. The results show that microstructure of TC4 titanium alloy after heat treatment consists of primary α phase and fine acicular α＋β phase. With increasing solu- tion temperature, primary α phase content decreases, while yield strength and tensile strength decreases then increases. With increasing aging temperature, grain size of acicular α＋β phase gradually increases, while tensile strength de- creases and plasticity increases.
出处
《航空制造技术》
北大核心
2013年第16期55-57,64,共4页
Aeronautical Manufacturing Technology
