Hot deformation behavior and microstructural evolution of powder metallurgical TiAl alloy

被引：3

作者：

Na Liu

Zhou Li

Wen-Yong Xu

Yue Wang

Guo-Qing Zhang

Hua Yuan

机构：

[1] ScienceandTechnologyonAdvancedHighTemperatureStructuralMaterialsLaboratory,BeijingInstituteofAeronauticalMaterials

来源：

Rare Metals | 2017年 / 36卷 / 04期

关键词：

TiAl alloy; Powder metallurgy; Hot deformation; Flow stress;

D O I：

暂无

中图分类号：

TG146.2 [轻有色金属及其合金]; TF12 [粉末冶金（金属陶瓷工艺）];

学科分类号：

080502 ;

摘要：

The hot deformation behavior of powder metallurgical（PM） TiAl alloys was investigated on Gleeble-3500 thermomechanical simulator, at a temperature range of 1050–1200 °C with an interval of 50 °C and a strain rate range of 0.001–1.000 s-1. The results show that the flow stress of PM TiAl alloy is sensitive to deformation temperature and strain rate, the peak stress decreases with the increase in deformation temperature and decrease in strain rate, and dynamic recrystallization occurs during the hot compression. The deformation active energy was calculated and the flow stress model during high-temperature deformation was established based on the Arrhenius equations and Zener–Hollomon parameter. The deformed microstructure consists of refined homogeneous γ and ɑ2/γ grains.

引用

页码：236 / 241

页数：6

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