Effect of Surface-Active Element Oxygen on Heat and Mass Transfer in Laser Welding of Dissimilar Metals: Numerical and Experimental Study

doi:10.3390/met12040556

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	Effect of Surface-Active Element Oxygen on Heat and Mass Transfer in Laser Welding of Dissimilar Metals: Numerical and Experimental Study
	Dong BX(董斌鑫)2,3; Li ZY(李志永)2,3; Yu G(虞钢)1,2,3; Li SX(李少霞)2,3; Tian CX(田崇鑫)2,3; Bian YH(边艳华)2,3; Shu Z(舒壮)2,3; He XL(何秀丽)2,3
刊名	METALS
	2022-04-01
卷号	12 期号:4 页码:22
关键词	dissimilar welding thermal behavior surface-active element fluid flow mass transfer
DOI	10.3390/met12040556
通讯作者	Li, Zhiyong(lizhiyong@imech.ac.cn) ; He, Xiuli(xlhe@imech.ac.cn)
英文摘要	The effects of the surface-active element oxygen on the laser welding of 304 stainless steel (304SS) and nickel were numerically and experimentally studied in pure argon and argon-oxygen mixed gas atmospheres containing 21% oxygen (AMO). In this study, the molten pool morphology, thermal behavior, solidification phenomenon, correlation between dilution and convection flow, and microhardness of welding joints were analyzed. As a result of oxygen effects, the molten pool was deeper, the maximum temperature was higher, and the maximum flow velocity was lower in the AMO. The cooling rate (GR) and combination parameter (G/R) were studied by the direct simulation of temperature gradient (G) and solidification growth rate (R). Combined with the solidification microstructure, it was found that oxygen had little effect on grain size. The major elements Fe, Cr, and Ni within the solidified molten pool in the AMO were uniformly diluted, while the distribution of the above elements was non-homogenous in pure argon. Stronger flow and multiple directions of convection inside the molten pool contributed to uniform dilution in the AMO. The distribution of microhardness was similar to the content of Cr, and the microhardness at the substrate interface of the joint was higher in the AMO than in pure argon. The preliminary conclusions of this study provide in-depth insights into the effects of surface-active element oxygen on heat and mass transfer in laser dissimilar welding.
分类号	二类
资助项目	Beijing Municipal Commission of Science and Technology[Z181100003818015] ; National Natural Science Foundation of China[11672304] ; Chinese Scholarship Council (CSC)
WOS关键词	MECHANICAL-PROPERTIES ; GTA ; MICROSTRUCTURE ; FLOW ; VAPORIZATION ; CONVECTION ; TRANSPORT ; JOINT ; SHAPE
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000785320000001
资助机构	Beijing Municipal Commission of Science and Technology ; National Natural Science Foundation of China ; Chinese Scholarship Council (CSC)
其他责任者	Li, Zhiyong ; He, Xiuli
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/88898]
专题	宽域飞行工程科学与应用中心
作者单位	1.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Dong BX,Li ZY,Yu G,et al. Effect of Surface-Active Element Oxygen on Heat and Mass Transfer in Laser Welding of Dissimilar Metals: Numerical and Experimental Study[J]. METALS,2022,12(4):22.
APA	董斌鑫.,李志永.,虞钢.,李少霞.,田崇鑫.,...&何秀丽.(2022).Effect of Surface-Active Element Oxygen on Heat and Mass Transfer in Laser Welding of Dissimilar Metals: Numerical and Experimental Study.METALS,12(4),22.
MLA	董斌鑫,et al."Effect of Surface-Active Element Oxygen on Heat and Mass Transfer in Laser Welding of Dissimilar Metals: Numerical and Experimental Study".METALS 12.4(2022):22.