Temperature-Dependent Effect of Deformation on Microstructure and Properties of TC4 Titanium Alloy

被引：0

作者：

Li, Xumin ^{[1
]}

Fang, Feng ^{[1
]}

Jiang, Jianqing ^{[1
]}

Zhou, Xuefeng ^{[1
]}

Hou, Yuxin ^{[2
]}

机构：

[1] Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing,211189, China

[2] Jiangsu Tiangong Technology Co., Ltd, Jurong,212400, China

来源：

Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2019年 / 48卷 / 10期

关键词：

Hardness - Titanium alloys - Microstructural evolution - Corrosion resistant alloys - Sodium chloride - Tensile testing - Volume fraction - Strain rate - Deformation;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The effect of deformation temperature on the evolution of microstructure and properties of TC4 alloy was studied by a constant-strain rate tensile test at high temperature. The results show that both the peak stress and its required strain decrease with increasing temperature in the α+β dual-phase field. The deformed microstructure exhibits a strong temperature-dependent evolution. Deformation leads to an accelerated recrystallization and refinement of primary α phase at a lower temperature of α+β phase field (below 900℃), whereas it results in a significant spheroidization of secondary α phase at a higher temperature (above 900℃). Additionally, deformation also affects the nucleation and growth process of β→α transformation, resulting in a larger amount of secondary α phase. With the increasing deformation temperature, the volume fraction of α phase firstly decreases and then increases, and thus hardness has a good consistence. However, the corrosion resistance displays a reverse evolution with the amount of α phase. TC4 alloy exhibits the lowest volume fraction of α phase of 57% at the deformation temperature of 900℃ and the best corrosion resistance in a NaCl solution, while it shows a slightly lowered hardness. © 2019, Science Press. All right reserved.

引用

页码：3379 / 3386