A unified model of coupled arc plasma and weld pool for double electrodes TIG welding

doi:10.1088/0022-3727/47/27/275202

	A unified model of coupled arc plasma and weld pool for double electrodes TIG welding
	Wang, Xinxin 1; Fan, Ding 1,2; Huang, Jiankang 1,2; Huang, Yong 1,2
刊名	JOURNAL OF PHYSICS D-APPLIED PHYSICS
	2014-07-09
卷号	47 期号:27
关键词	unified model coupled arc double electrodes weld pool
ISSN号	0022-3727
DOI	10.1088/0022-3727/47/27/275202
英文摘要	A three-dimensional model containing tungsten electrodes, arc plasma and a weld pool is presented for double electrodes tungsten inert gas welding. The model is validated by available experimental data. The distributions of temperature, velocity and pressure of the coupled arc plasma are investigated. The current density, heat flux and shear stress over the weld pool are highlighted. The weld pool dynamic is described by taking into account buoyance, Lorentz force, surface tension and plasma drag force. The turbulent effect in the weld pool is also considered. It is found that the temperature and velocity distributions of the coupled arc are not rotationally symmetrical. A similar property is also shown by the arc pressure, current density and heat flux at the anode surface. The surface tension gradient is much larger than the plasma drag force and dominates the convective pattern in the weld pool, thus determining the weld penetration. The anodic heat flux and plasma drag force, as well as the surface tension gradient over the weld pool, determine the weld shape and size. In addition, provided the welding current through one electrode increases and that through the other decreases, keeping the total current unchanged, the coupled arc behaviour and weld pool dynamic change significantly, while the weld shape and size show little change. The results demonstrate the necessity of a unified model in the study of the arc plasma and weld pool.
资助项目	National Science Foundation of China (NSFC)[51074084][51205179]
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000338720700006
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/34327]
专题	材料科学与工程学院
通讯作者	Fan, Ding
作者单位	1.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China 2.State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xinxin,Fan, Ding,Huang, Jiankang,et al. A unified model of coupled arc plasma and weld pool for double electrodes TIG welding[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2014,47(27).
APA	Wang, Xinxin,Fan, Ding,Huang, Jiankang,&Huang, Yong.(2014).A unified model of coupled arc plasma and weld pool for double electrodes TIG welding.JOURNAL OF PHYSICS D-APPLIED PHYSICS,47(27).
MLA	Wang, Xinxin,et al."A unified model of coupled arc plasma and weld pool for double electrodes TIG welding".JOURNAL OF PHYSICS D-APPLIED PHYSICS 47.27(2014).