A Comparative Study on Direct and Pulsed Current Micro-plasma Arc Welding of Alloy Ti-6Al-4V

被引:7
|
作者
Rahimi, Amirkeyvan [1 ]
Shamanian, Morteza [1 ]
Rahimi, Ahmadreza [1 ]
Kangazian, Jalal [1 ]
机构
[1] Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran
关键词
Pulsed current micro-plasma arc welding; Tensile strength; Ti-6Al-4V alloy; MICROSTRUCTURE;
D O I
10.1007/s12666-018-1501-y
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
In this project, the sheet of Ti-6Al-4V alloy (annealed) with a thickness of 1 mm was welded with butt joints by means of pulsed current micro-plasma arc welding without using a filler metal. The purpose of this study is to optimize parameters in the event of increasing tensile strength by using pulse current and its comparison with the pulse-free system. Optical microscope and scanning electron microscope were used to investigate the type of phases, microstructure of weld metal, base metal and heat-affected zone. Results illustrated that due to the low thickness of the sheet, the non-use of filler metal in the welding process and the lower heat input of this process, all contributed to a higher cooling rate of the molten pool.
引用
收藏
页码:3103 / 3110
页数:8
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