Deformation Behavior and Microstructure Evolution of TA15 Titanium Alloy after Isothermal near β Deformation

被引：0

作者：

Gao Yang ^{[1
]}

Sun Zhichao ^{[1
]}

Yang He ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2013年 / 42卷 / 05期

关键词：

TA15 titanium alloy; isothermal near beta deformation; deformation behavior; equiaxed alpha; empirical model; MECHANICAL-PROPERTIES; FORGING PROCESS; PARAMETERS;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The deformation behavior and microstructure evolution after isothermal near beta deformation of TA15 titanium alloy with initially equiaxed microstructure were investigated by compression tests. The effects of deformation temperature, strain and strain rate on the deformation behavior and microstructure transformation were quantitatively characterized through metallographs analysis. Results show that dynamic recrystallization is suppressed and dynamic recovery is promoted with the deformation temperature increasing or the strain rate decreasing. Otherwise dynamic recrystallization is promoted and dynamic recovery is suppressed with the deformation temperature decreasing or the strain rate increasing. Deformation temperature is the primary factor influencing the volume fraction, the size and the aspect of equiaxed alpha. Increasing strain rate has little effect on the refinement of equiaxed alpha. The empirical model was developed to describe the relationship between deformation temperature and the volume fraction as well as the size of equiaxed alpha in the near beta temperature range. The research results can provide a guide for process optimization and control of isothermal near beta deformation of TA15 titanium alloy.

引用

页码：951 / 956

页数：6