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Numerical and Experimental Investigations of Solidification Parameters and Mechanical Property during Laser Dissimilar Welding
Li ZY(李志永); Yu G(虞钢); He XL(何秀丽); Li SX(李少霞); Zhao Y(赵尧)
Source PublicationMETALS
2018-10-01
Volume8Issue:10Pages:Ar-799
ISSN2075-4701
Abstract

Laser beam welding (LBW) has been considered an effective fusion welding method for the dissimilar welding of 304 stainless steel and Ni. However, the principles governing the correlations between the heat input, weld dimension, solidified microstructure and mechanical properties have not been fully studied before. Therefore, LBW experiments with variable heat input were carried out. A transient, three-dimensional model considering liquid metal convection was developed, and solidification parameters such as temperature gradient (G), growth rate (R), and cooling rate (GR) were calculated through thermal analysis to validate the experimental results. Then, microhardness tests were carried out to verify the predications made by the simulation. Energy dispersive spectroscopy (EDS) measurements were performed to study the mass transfer. The results indicate that the joints produced by LBW were nearly defect-free. The heat input per unit length is more effective at characterizing the influence of heat input on weld dimensions. The heat input has a greater influence on the cooling rate (GR) than the morphology parameter (G/R). The results demonstrate that both the solidification characteristics and mechanical property are greatly affected by the thermal behavior in the molten pool.

Keywordlaser welding dissimilar solidified microstructure cooling rate microhardness
DOI10.3390/met8100799
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000448658700063
WOS KeywordFLUID-FLOW ; HEAT-TRANSFER ; PHASE-CHANGE ; 304-STAINLESS-STEEL ; ALUMINUM ; METAL
WOS Research AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [11272316, 11272317, 11672304, 11502269] ; Chinese Academy of Sciences [yz201636] ; Pilot Project B of the Chinese Academy of Sciences
Classification二类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78166
Collection先进制造工艺力学重点实验室
Affiliation1.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
Recommended Citation
GB/T 7714
Li ZY,Yu G,He XL,et al. Numerical and Experimental Investigations of Solidification Parameters and Mechanical Property during Laser Dissimilar Welding[J]. METALS,2018,8(10):Ar-799.
APA Li ZY,Yu G,He XL,Li SX,&Zhao Y.(2018).Numerical and Experimental Investigations of Solidification Parameters and Mechanical Property during Laser Dissimilar Welding.METALS,8(10),Ar-799.
MLA Li ZY,et al."Numerical and Experimental Investigations of Solidification Parameters and Mechanical Property during Laser Dissimilar Welding".METALS 8.10(2018):Ar-799.
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