Microstructure and Properties of TC4 Titanium Alloy Hot-Rolled Sheet by Electron Beam Cold Bed Furnace Melting

被引：0

作者：

Zhao, Shuai ^{[1
]}

Xiao, Han ^{[1
]}

Qin, Tiechang ^{[2
]}

Huang, Haiguang ^{[1
,2
]}

Zhou, Rongfeng ^{[1
]}

Li, Zhimin ^{[2
]}

机构：

[1] Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming,650093, China

[2] Yunnan Titanium Industry Co. Ltd, Chuxiong,651209, China

来源：

Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2019年 / 48卷 / 12期

关键词：

Grain boundaries - Titanium alloys - Crystal orientation - Electron beams - Ductile fracture - Textures;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The effects of unidirectional and reversal hot rolling on the microstructure and mechanical properties of TC4 titanium alloy ingot melted by electron beam cold bed furnace were studied. The results show that the microstructure of TC4 titanium alloy slab is Widmannstatten structure. After hot rolling plastic deformation, the grain boundary is fully broken, and the α phase bundle is twisted, deformed and broken, and it is criss-crossed and distributed in a basket shape. With the increase of the number of reversing hot rolling, the lath-like α phase cross-section is more obvious, which reduces the anisotropy in the rolling direction and the transverse direction, and the comprehensive performance of the reversing secondary hot-rolled sheet is optimal. The fracture transformation forms of TC4 titanium alloy are unidirectional hot-rolled RD ductile fracture and TD ductile+quasi-cleavage mixed fracture, reversed one-time hot-rolled RD ductile+ brittle mixed fracture and TD ductile+quasi-cleavage mixed fracture, reversed two-time hot-rolled ductile fracture. The hot-rolled sheet is mainly a matrix phase of α-Ti and β-Ti. The grain orientation of the unidirectional hot-rolled sheet has a preferred orientation in the direction; the grain orientation of the reversing once hot-rolled sheet is mainly between and crystal orientation; the grain orientation of the reversing secondary hot-rolled sheet moves toward , and its grain orientation is between and . © 2019, Science Press. All right reserved.

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页码：4053 / 4059