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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)
发表期刊METALS
2018-10-01
卷号8期号:10页码:Ar-799
ISSN2075-4701
摘要

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.

关键词laser welding dissimilar solidified microstructure cooling rate microhardness
DOI10.3390/met8100799
URL查看原文
收录类别SCI
语种英语
WOS记录号WOS:000448658700063
关键词[WOS]FLUID-FLOW ; HEAT-TRANSFER ; PHASE-CHANGE ; 304-STAINLESS-STEEL ; ALUMINUM ; METAL
WOS研究方向Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS类目Materials Science ; Metallurgy & Metallurgical Engineering
项目资助者National Natural Science Foundation of China [11272316, 11272317, 11672304, 11502269] ; Chinese Academy of Sciences [yz201636] ; Pilot Project B of the Chinese Academy of Sciences
论文分区二类
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/78166
专题先进制造工艺力学重点实验室
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
推荐引用方式
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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