Chinese Journal of Rare Metals. 2014, (02) Core

Microstructure Evolution of TA15 Alloy during Superplastic DeformationChinese Full Text

Xi Bing;Ju Jianhui;Wang Jing;Shu Ying;Wang Ruining;Zhang Changjuan;School of Metallurgical Engineering,Xi’an University of Architecture and Technology;Northwest Institute for Nonferrous Metal Research;Western Titanium Technologies Co.,Ltd.;

Abstract: The microstructure evolution and the effect of deformation condition during superplastic deformation behavior of TA15 alloy were investigated. The results showed that,from 850 950 ℃ deformation temperature and 1 × 10- 41 × 10- 3s- 1strain rate,TA15 alloy had the good superplastic deformation property. Under deformation condition of 900 ℃ and 5. 5 × 10- 4s- 1,it had the biggest elongation of 803. 3%. In the same strain-rate,the dimension of the α phase grains and the content of β phase increased with the tensile temperature increasing,the grains still retained in equiaxed state. At the same deformation temperature,the dimension of the α phase grains and the content of β phase increased with the strain-rate decreasing. Meanwhile,the deformation had a significant influence on the microstructure,different parts of the microstructure had a certain degree of coarsening,greater degree of deformation made coarsening more serious,along with α to β phase transform. During deformation,the hardening and the softening competed against each other,and performed the traditional steady-state superplastic flow characteristics.

Keywords：

TA15 titanium alloy; superplasticity; deformation temperature; strain rate; microstructure;

DOI：
10.13373/j.cnki.cjrm.2014.02.023
Series：
Subject：
Classification Code：
TG146.23

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Microstructure Evolution of TA15 Alloy during Superplastic DeformationChinese Full Text

Xi Bing;Ju Jianhui;Wang Jing;Shu Ying;Wang Ruining;Zhang Changjuan;School of Metallurgical Engineering,Xi’an University of Architecture and Technology;Northwest Institute for Nonferrous Metal Research;Western Titanium Technologies Co.,Ltd.;

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