Influence of hot rolling process on microstructure, microtexture and mechanical properties of Ti-6Al-4V alloy fabricated by electron beam cold hearth melting

被引：0
|
作者：
Wang W. [1 ,2 ]
Gong P.-H. [1 ]
Shi Y.-M. [2 ]
Zhang H.-Z. [2 ,3 ]
Zhang X.-F. [2 ]
Wang K.-S. [1 ]
机构：
[1] School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an
[2] Yunnan Titanium Industry Co., Ltd., Chuxiong
[3] School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2022年 / 32卷 / 09期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Electron beam cold hearth melting; Mechanical property; Microstructure; Microtexture; TC4 titanium alloy;
D O I：
10.11817/j.ysxb.1004.0609.2021-42301
中图分类号：
学科分类号：
摘要：
The influence of the hot rolling process on the microstructure, microtexture and mechanical properties of Ti-6Al-4V alloy fabricated by electron beam cold hearth melting were investigated. The results show that the prior coarse grains are broken with the increase of the heating deforming number. The grains gradually change to the equiax to form a mass of fine equiaxed α phases. Besides, the fractions of the Low Angles Grain Boundaries (LAGBs) increase with the heating deforming number. After the third heating deforming, the fractions of LAGBs increases by 35.1%, compared with the fractions of LAGBs after the first heating deforming. Meanwhile, the dislocation density increases. The variant selection occurring during the β → α transformation during the hot rolling process. The strong "T" textures are found after the first heating deforming, and the prismatic 〈a〉 slip system triggers firstly. The texture component changes with the increase of the heating deforming number. The tensile strength and elongation of the samples significantly improve after the third heating deforming. The tensile strength of the sample at room temperature and 400 ℃ increase by 271 MPa and 189 MPa in the rolling direction and 300 MPa and 402 MPa in transverse direction, respectively, compared with the as-cast sample. In addition, the elongation of the sample at room temperature and 400 ℃ increase by 7.4% and 15.3% in rolling direction and 7.6% and 4% in transverse direction, respectively. The fracture mechanisms change from quasi-cleavage fracture to ductile fracture in rolling direction, and the fracture mechanisms change from brittle fracture to ductile fracture in transverse direction. © 2022, China Science Publishing & Media Ltd. All right reserved.
引用
收藏
页码：2595 / 2608
页数：13
相关论文
共 35 条
  • [1] DU Bin, ZHANG Zhi-bin, LEI Yun-qing, Et al., Melting technology of electron beam cold hearth melting of TA15 titanium alloy, The Chinese Journal of Nonferrous Metals, 30, 11, pp. 2706-2713, (2020)
  • [2] LIU Qian-li, JIANG Peng, AN Fei-peng, Design of crucible size of electron beam cold hearth melting for ultra-long and ultra-thin TC4 ingot, Rare Metal Materials and Engineering, 49, 5, pp. 1476-1482, (2020)
  • [3] ZHANG Hao-ze, HUANG Hai-guang, WANG Wei, Et al., Al element volatilization loss of Ti-Al-V alloy during electron beam melting, Rare Metal Materials and Engineering, 50, 7, pp. 2415-2420, (2021)
  • [4] CHEN Feng, CHEN Li, GUO Bin, Et al., Advantages and disadvantages of electron beam cold hearth melting, The Chinese Journal of Nonferrous Metals, 20, pp. 873-876, (2010)
  • [5] PENG X N, GUO H Z, SHI Z F, Et al., Microstructure characterization and mechanical properties of TC4-DT titanium alloy after thermomechanical treatment, Transactions of Nonferrous Metals Society of China, 24, 3, pp. 682-689, (2014)
  • [6] FENG Qiu-yuan, TONG Xue-wen, WANG Jian, Et al., Status quo and development tendency on the research of low cost titanium alloy, Materials Review, 31, 9, pp. 128-134, (2017)
  • [7] SOUZA P M, MENDIGUREN J, CHAO Q, Et al., A microstructural based constitutive approach for simulating hot deformation of Ti6Al4V alloy in the α+β phase region, Materials Science and Engineering A, 748, pp. 30-37, (2019)
  • [8] MILTON S, DUCHOSAL A, CHALON F, Et al., Thermal study during milling of Ti6Al4V produced by Electron Beam Melting (EBM) process, Journal of Manufacturing Processes, 38, pp. 256-265, (2019)
  • [9] JIA Hong, LU Fu-sheng, HAO Bin, Report on China titanium industry progress in 2020, Titanium Industry Progress, 38, 2, pp. 34-41, (2021)
  • [10] ZHAO Shuai, XIAO Han, QIN Tie-chang, Et al., Microstructure and properties of TC4 titanium alloy hot-rolled sheet by electron beam cold bed furnace melting, Rare Metal Materials and Engineering, 48, 12, pp. 4053-4059, (2019)
1234