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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
Source PublicationRESULTS IN PHYSICS
2019-03-01
Volume12Pages:1062-1072
ISSN2211-3797
Abstract

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.

KeywordLaser welding Dissimilar metals ALE Thermal behavior Solidification characteristics
DOI10.1016/j.rinp.2018.12.017
Indexed BySCI
Language英语
WOS IDWOS:000460704700153
WOS KeywordFLUID-FLOW ; HEAT-TRANSFER ; NUMERICAL-SIMULATION ; PHASE-CHANGE ; MOLTEN POOL ; ARC ; STEEL ; ALLOY
WOS Research AreaMaterials Science, Multidisciplinary ; Physics, Multidisciplinary
WOS SubjectMaterials Science ; Physics
Funding OrganizationNational Natural Science Foundation of China [11272316, 11272317,11672304, 11502269] ; Chinese Academy of Sciences [yz201636]
Classification二类
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78434
Collection先进制造工艺力学重点实验室
Affiliation1.{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
Recommended Citation
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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