等轴细晶TC4钛合金应变补偿本构关系及热加工图的研究

doi:10.11896/cldb.20070109

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Abstract The deformation behavior of equiaxed fine grain TC4 alloy under deformation temperature of 800—950 ℃ and strain rate of 0.01—10 s^-1 was studied by hot compression experiment, and the Arrhenius constitutive equation and hot processing map were established. Based on the true stress-strain curves obtained by experiment, the strain compensation is modified to the constitutive equation. The results show that the true stress decreases with the increase of temperature and the decrease of strain rate. The correlation coefficient between the predicted true stress and the experimental value R is 0.985, and the relative error ARRE is 6.8%. Combined with the hot processing map and the electron backscatter diffraction (EBSD) analysis of the corresponding region, it can be seen that the temperature in the instability zone is between 875—950 ℃, the strain rate is between 0.3—10 s^-1, and the microstructure features are long strip grains. The optimum temperature in the processing area is between 800—875 ℃, the strain rate is between 0.01—0.3 s^-1, and the microstructure is equiaxed fine grain.

Key words： equiaxed fine grain TC4 titanium alloy constitutive equation strain compensation correction hot processing map

Published: 30 September 2021

CLC number:

TG146.2

Fund:This work was financially supported by the Foundation of Defense Industrial Technology Development Program(JCKY2018203C031).

About author:: Zongxin Yi is a master candidate in the School of Mechanical and Automotive Engineering, South China University of Technology. The research mainly focuses on simulation of material forming process. He has parti-cipated in one Defense Industrial Technology Development Program.

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	YI Zongxin
	LI Xiaoqiang
	PAN Cunliang
	SHEN Zhengzhang

Cite this article:

YI Zongxin,LI Xiaoqiang,PAN Cunliang, et al. Research on Strain Compensation Constitutive Equation and Hot Processing Map of Equiaxed Fine Grain TC4 Alloy[J]. Materials Reports, 2021, 35(18): 18146-18152.

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http://www.mater-rep.com/EN/10.11896/cldb.20070109 OR http://www.mater-rep.com/EN/Y2021/V35/I18/18146

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