Analysis of surface tension driven flow and solidification behavior in laser linear welding of stainless steel

doi:10.1016/j.optlastec.2019.105914

IMECH-IR > 先进制造工艺力学实验室

	Analysis of surface tension driven flow and solidification behavior in laser linear welding of stainless steel
	Li ZY(李志永)1,2; Yu G(虞钢)1,2,3 ; He XL(何秀丽)1,2 ; Li SX(李少霞)1,2 ; Tian CX(田崇鑫)1,2 ; Dong BX 1,2
通讯作者	Yu, Gang(gyu@imech.ac.cn) ; He, Xiuli(xlhe@imech.ac.cn)
发表期刊	OPTICS AND LASER TECHNOLOGY
	2020-03-01
卷号	123 页码:11
ISSN	0030-3992
摘要	A transient three-dimensional thermal-fluid-metallurgy model was proposed to study the surface tension driven flow and welding metallurgical behavior during laser linear welding of 304 stainless steel. Numerical simulation and experimental method were both used to investigate the thermal behavior, surface tension driven flow, driving mechanism and solidification characteristics. The temperature related driving force was qualitatively analyzed, and surface tension and surface shear stress were quantitatively studied. Numerical method and dimensional analysis were also carried out to understand the importance of different driving forces, respectively. The metallurgical model was sequentially coupled to the thermal-fluid model to calculate four solidification parameters. Temperature gradient was observed to be much larger at the front of the melt pool due to the effect of thermal conductivity, and decreased from center to the periphery. Both the surface tension and surface tension driven flow were found smaller in the central area. The maximum shear stress may reach 2500 N/m(2) and pushed an intense outward convection. The solidification parameters were used to predict the solidified morphology, and the prediction was well validated by experimental results. The obtained basic conclusions in this work demonstrated that this study of thermal-fluid-metallurgical behavior could provide an improved understanding of the surface tension driven flow and solidification behavior inside the melt pool of welding and additive manufacturing process.
关键词	Surface tension Driving force Fluid flow Solidification behavior Additive manufacturing
DOI	10.1016/j.optlastec.2019.105914
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000504504400030
关键词[WOS]	NUMERICAL-SIMULATION ; THERMAL-BEHAVIOR ; FLUID-FLOW ; PHASE-CHANGE ; CONVECTION ; METAL ; HEAT ; ARC ; TRANSPORT ; DYNAMICS
WOS研究方向	Optics ; Physics
WOS类目	Optics ; Physics, Applied
资助项目	National Natural Science Foundation of China[11272316] ; National Natural Science Foundation of China[11272317] ; National Natural Science Foundation of China[11672304] ; National Natural Science Foundation of China[11502269] ; plan of Beijing Municipal Commission of Science and Technology[Z181100003818015] ; Chinese Academy of Sciences[yz201636]
项目资助者	National Natural Science Foundation of China ; plan of Beijing Municipal Commission of Science and Technology ; Chinese Academy of Sciences
论文分区	二类
力学所作者排名	1
RpAuthor	Yu, Gang ; He, Xiuli
引用统计	被引频次：31[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/81285
专题	先进制造工艺力学实验室
作者单位	1.Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li ZY,Yu G,He XL,et al. Analysis of surface tension driven flow and solidification behavior in laser linear welding of stainless steel[J]. OPTICS AND LASER TECHNOLOGY,2020,123:11.
APA	李志永,虞钢,何秀丽,李少霞,田崇鑫,&Dong BX.(2020).Analysis of surface tension driven flow and solidification behavior in laser linear welding of stainless steel.OPTICS AND LASER TECHNOLOGY,123,11.
MLA	李志永,et al."Analysis of surface tension driven flow and solidification behavior in laser linear welding of stainless steel".OPTICS AND LASER TECHNOLOGY 123(2020):11.

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