摘要
研究了一种新型超塑性钛合金在不同加工条件下的力学性能及显微组织。结果表明:合金棒材经过轧制后的显微组织较原始锻态的组织均匀细小;室温力学性能分析结果表明,轧制棒材的力学性能较锻棒的力学性能优异;棒材超塑性分析结果表明,细化晶粒可改善合金的超塑性能,该合金的最佳超塑性变形温度在750℃左右,最大伸长率达到1164%,超塑性变形机制研究表明对变形起主导作用的是晶界行为和扩散蠕变等共同作用的结果。
Microstructure and mechanical property of a new developed super-plastic titanium alloy were researched in this paper. The results show that grain size of the rolled bar is finer than that forged one,and mechanical property of the rolled bar is better. The results of the superplastic analysis show that the fine microstructure can improve the superplasticity properties,the best deformation temperature for the alloy is about 750 ℃,and the largest enlongation is about 1164%. Grain boundary behaviour and diffusion creep are mainly deformation mechanism during the superplastic deformation.
作者
王凯旋
郭萍
毛小南
侯红苗
潘浩
张永强
贾国玉
WANG Kai-xuan;GUO Ping;MAO Xiao-nan;HOU Hong-miao;PAN Hao;ZHANG Yong-qiang;JIA Guo-yu(Western Superconducting Technologies Co Ltd, Xi’ an 710018,China;Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2019年第9期26-31,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51471136)
中法国际合作项目(2015DFA51430)
关键词
超塑性钛合金
微观组织
力学性能
超塑性变形机制
superplastic titanium alloy
microstructure
mechanical property
deforamtion mechanism of super plasticity
