TiH2基粉末冶金近α钛合金Ti-1100的热变形行为

RARE METAL MATERIALS AND ENGINEERING(2020)

Cited 0|Views0
No score
Abstract
通过热压缩试验,研究了TiH2基粉末冶金近α钛合金Ti-1100在973~1173 K温度范围和0.01~1.0 s-1应变速率范围内的热变形行为.建立了Arrhenius本构方程,计算出的热形变活化能为334.76 kJ/mol.通过修改函数计算了温度灵敏度(θ),确定了应变率灵敏度(m).根据温度灵敏度、应变率灵敏度和应变为0.5时的显微组织分析结果,对热加工条件进行了分析.结果 表明,在应变率为0.01和1 s-1时,在整个温度范围内出现了失稳区,而在1135 K/0.29 s-1至1173K/0.76 s-1、1040 K/0.33 s-1至1096K/0.6 s-1的范围内获得了最佳的热加工条件.此外,微观结构分析表明,在0.01~0.1 s-1的应变速率条件下发生了动态再结晶(DRX),而应变率为1 s-1时微孔的形成是流动软化的主要机制.
More
Translated text
Key words
Ti-1100 alloy,TiH2-based powder metallurgy,hot compression test,Arrhenius constitutive model,strain rate sensitivity,temperature sensitivity,hot workability
AI Read Science
Must-Reading Tree
Example
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined