Study of thermal behavior and solidification characteristics during laser welding of dissimilar metals
Li ZY(李志永); Yu G(虞钢); He XL(何秀丽); Li SX(李少霞); Li HM; Li QY
刊名RESULTS IN PHYSICS
2019-03-01
卷号12页码:1062-1072
关键词Laser welding Dissimilar metals ALE Thermal behavior Solidification characteristics
ISSN号2211-3797
DOI10.1016/j.rinp.2018.12.017
英文摘要

A transient three-dimension model was developed to study the thermal behavior and solidification characteristics during laser linear welding of 304ss and Ni considering the free surface deformation of the melt pool. The evolution of temperature and velocity field, the weld pool configuration and the solidification microstructure were investigated numerically and experimentally. A moving mesh method based on the Arbitrary Lagrangian Eulerian (ALE) was adopted to capture the free surface. Dimensional analysis was carried out to study the different heat transfer mechanisms. The solidification parameters, including the cooling rate (GR) and the morphological parameters (G/R The molten pool configuration on both sides changed from circular to elliptical as a result of the change of the dominant heat transfer mechanism. Sharp changes of the curvatures of the weld pool boundary were also observed and explained by the Prandtl number. Because the G/R was bigger at the bottom and the GR was larger at the top surface of the molten pool, the microstructure morphology changed from equiaxed dendrites to cellular dendrites to planar, and grain size increased from the top area to the bottom in 304ss side. The similar phenomenon was also observed in Ni side.

分类号二类
WOS关键词FLUID-FLOW ; HEAT-TRANSFER ; NUMERICAL-SIMULATION ; PHASE-CHANGE ; MOLTEN POOL ; ARC ; STEEL ; ALLOY
WOS研究方向Materials Science, Multidisciplinary ; Physics, Multidisciplinary
语种英语
WOS记录号WOS:000460704700153
资助机构National Natural Science Foundation of China [11272316, 11272317,11672304, 11502269] ; Chinese Academy of Sciences [yz201636]
其他责任者Yu, G ; He, XL
内容类型期刊论文
源URL[http://dspace.imech.ac.cn/handle/311007/78434]  
专题力学研究所_先进制造工艺力学重点实验室
作者单位1.{Li, Zhiyong、Yu, Gang、He, Xiuli、Li, Shaoxia、Li, Qingyu} Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing 100190, Peoples R China
2.{Li, Zhiyong、Yu, Gang、He, Xiuli、Li, Haiming、Li, Qingyu} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Li ZY,Yu G,He XL,et al. Study of thermal behavior and solidification characteristics during laser welding of dissimilar metals[J]. RESULTS IN PHYSICS,2019,12:1062-1072.
APA Li ZY,Yu G,He XL,Li SX,Li HM,&Li QY.(2019).Study of thermal behavior and solidification characteristics during laser welding of dissimilar metals.RESULTS IN PHYSICS,12,1062-1072.
MLA Li ZY,et al."Study of thermal behavior and solidification characteristics during laser welding of dissimilar metals".RESULTS IN PHYSICS 12(2019):1062-1072.
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