Microstructure and mechanical properties of a laser welded low carbon-stainless steel joint

被引：51

作者：

Esfahani, M. Nekouie ^{[1
]}

Coupland, J. ^{[1
]}

Marimuthu, S. ^{[1
]}

机构：

[1] Univ Loughborough, Wolfson Sch Mech & Mfg, Opt Engn Grp, Loughborough LE11 3TU, Leics, England

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2014年 / 214卷 / 12期

关键词：

Alloy concentration; CFD analysis; Dissimilar welding; Laser; Melt pool; Steel; GAS-TUNGSTEN-ARC; HEAT-TRANSFER; FLUID-FLOW; SPOT WELDS; BEAM;

D O I：

10.1016/j.jmatprotec.2014.07.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This article reports on an experimental investigation to understand and subsequently control the alloying composition in laser welding of austenitic stainless steel and low carbon steel. An energy dispersive spectrometer was used to analyse the alloying composition, while microscopy and tensile tests were used to study the microstructure, and mechanical performance of the welded joint respectively. The investigation revealed that above a certain specific point energy the material within the melt pool is well mixed and the laser beam position can be used to control the mechanical properties of the joint. This finding was confirmed using a numerical model based on computational fluid dynamics (CFD) of melt pool dynamics. Strategies to control the composition leading to dramatic changes in hardness, microstructure and mechanical properties of the dissimilar laser welded joint are discussed. (c) 2014 Elsevier B.V. All rights reserved.

引用

页码：2941 / 2948

页数：8

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