Process on Microstructure and Mechanical Properties of BTi20 Titanium Alloy with Two Forging Processes

被引：0

作者：

Wang Q. ^{[1
]}

Shuang Y. ^{[1
]}

Sun Y. ^{[1
]}

Wang W. ^{[1
]}

机构：

[1] College of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an

来源：

Xiyou Jinshu/Chinese Journal of Rare Metals | 2019年 / 43卷 / 01期

关键词：

BTi20 titanium alloy; Forging process; Heat treatment; Mechanical properties; Microstructure;

D O I：

10.13373/j.cnki.cjrm.XY18040013

中图分类号：

学科分类号：

摘要：

Reasonable forging process could significantly affect the microstructure and mechanical properties of beta titanium alloy. The effects of β forging process and α+β forging process on the microstructure and room temperature tensile properties of a new β titanium alloy BTi20 were studied by metallographic microscope (OM), scanning electron microscope (SEM) and microhardness tester. The results showed that the forged microstructure of β forging alloy has uniform equiaxed β grains, and the α+β forging alloy was equiaxed primary α and β phases. The strength of the two alloy was above 1500 MPa and the elongation was about 7%. After solution below the transformation point, the equiaxed primary α phase was precipitated in both alloys. The volume fraction of primary phase in β forging alloy was higher than that of α+β forging alloy, and the distribution was more uniform. After solution above the transformation point, the average grain size in β forging alloy was larger than that of α+β forging alloy. The strength of the former was higher than that of the latter, whereas the plasticity was not. After the (α+β) solution and aging treatment, the distribution of the primary short-rod α phase in β forging alloy was more uniform, and the size of the secondary α phase was smaller and the strength was higher than that of the α+β forging alloy, but the plasticity was lower. After the β phase zone solution and aging treatment, α+β forging alloy has more uniform basket weave microstructure and higher strength than the β forging alloy. But the plasticity was almost the same. That is, after the solution and aging treatment, the strength and plasticity of α + β forging alloy was better than that of β forging alloy. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.

引用

页码：32 / 37

页数：5

共 18 条

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