摘要
采用β锻造工艺制取Ti-26合金饼材,利用光学金相显微镜、透射电子显微镜与X射线衍射仪研究了Ti-26合金在不同变形量下的微观组织,及经过稍高于相变点热处理后的组织及相组成。利用万能试验机测其力学性能。结果表明:Ti-26合金变形前后的组织都是由β相和弥散分布的α相组成,所不同的是变形后α相含量增加,且由短棒状变成片状;在稍高于相变点温度固溶,再时效处理后,随着变形量的增加,强度先降低再升高,当变形量达到80%时,可以使合金得到较好的强度、塑性配合。
The microstructures of Ti-26 alloy were researched before and after different deformation by β forging process （50%, 60%, 70%, 80%） by OM, TEM and X-ray diffraction analysis. The microstructure and mechanical properties after the heat treatment near β transformation temperature were also studied. The results indicate that the microstructure of Ti-26 alloy is mainly consisted of β phase and needle-like and short rod-like α phase distributed dispersedly. However, the amount of α phase increases after deformation, while the short rod-like become plate-like. After the heat treatment, with the increase of deformation, its strength is decreased first but increased later. Good combination of strength and plasticity can be obtained when the deformation amount reaches 80%.
出处
《钛工业进展》
CAS
2007年第4期35-38,共4页
Titanium Industry Progress
基金
国家自然科学基金重点项目资助(50434030)
关键词
Ti-26钛合金
微观组织
变形
力学性能
Ti-26 titanium alloy
microstructure
deformation
mechanical properties
