All-position plasma arc welding process for thick TC4 tube and mechanical properties of welded joints

被引：0
|
作者：
Guo C. [1 ]
Liu B. [1 ,2 ]
Dong C. [1 ]
Yi J. [1 ]
机构：
[1] Guangdong Provincial Key Laboratory of Advanced Welding Technology, Guangdong Welding Institute, China-Ukraine E. O. Paton Institute of Welding, Guangzhou
[2] Shenyang University of Technology, Shenyang
来源：
Hanjie Xuebao/Transactions of the China Welding Institution | 2019年 / 40卷 / 07期
关键词：
All position welding; Mechanical propertie; Microstructure; Plasma arc welding; Titanium alloy tube;
D O I：
10.12073/j.hjxb.2019400193
中图分类号：
学科分类号：
摘要：
A new plasma arc welding process for thick-walled TC4 titanium alloy tube was investigated. All-position high-quality welding joints of titanium alloy were achieved through parameters optimization. The microstructure, fracture morphology and microhardness of the welded joints at ordered locations were characterized by optical microscopy, scanning electron microscopy and micro Vickers hardness tester. The results reflected that the microstructure of the weld metal and the heat-affected zone of the characteristic joint were mainly composed of basket-shaped α' phase, needle-like α phase and coarse β phase. The tensile fractures of specimens was occurred at base metal, revealing well tensile properties. The fracture morphology of the impact specimens was ductile fracture. The hardness of weld metal and heat affected zones was higher than that of base metal, respectively. © 2019, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.
引用
收藏
页码：121 / 126
页数：5
相关论文
共 14 条
  • [1] Li D., Liu F., Wang J., Features of protective welding of titanium material and alloys, General Machinery, 10, pp. 50-53, (2003)
  • [2] Zhao Y., Wei J., Gao Z., Et al., Titanium alloys: current status of application and low cost manufacturing technologies, Materials Review, 17, 4, pp. 5-7, (2003)
  • [3] Cheng D., Huang J., Lin H., Et al., Microstructure and mechanical analysis of Ti-6Al-4V laser butt weld joint, Transactions of the China Welding Institution, 30, 2, pp. 103-106, (2009)
  • [4] Lin Y.C., Lin Y.C., Elucidation of microstructure and wear behaviors of Ti-6Al-4V cladding using tungsten boride powder by the GTAW method, Journal of Coatings Technology & Research, 8, 2, pp. 247-253, (2011)
  • [5] Kumar A., Sapp M., Vincelli J., Et al., A study on laser cleaning and pulsed gas tungsten arc welding of Ti-3Al-2.5V alloy tubes, Journal of Materials Processing Technology, 210, 1, pp. 64-71, (2010)
  • [6] Chen J., Pan C., Welding of Ti-6Al-4V alloy using dynamically controlled plasma arc welding process, Transactions of Nonferrous Metals Society of China, 21, 7, pp. 1506-1512, (2011)
  • [7] Sun W., Guo C., Liu B., Et al., Microstructure and properties of all-position automatic plasma arc welding joint of TA2 pipeline, Hot Working Technology, 3, pp. 61-64, (2018)
  • [8] Chen J.C., Pan C.X., Welding of Ti-6A1-4V alloy using dynamically controlled plasma arc welding process, Transaction of Nonferrous Metals Society of China, 21, 7, pp. 1506-1512, (2011)
  • [9] Levine E., Greenhut I., Margolin H., Grain size and grain growth in an equiaxed alpha-beta titanium alloy, Metallurgical Transactions, 4, 11, pp. 2519-2525, (1973)
  • [10] Grewal G., Ikem S., Particle coarsening behavior of α-β titanium alloys, Metallurgical Transactions A, 21, 6, pp. 1645-1654, (1990)
12