Control of aluminium laser welding conditions with the help of numerical modelling

被引：17
作者：
Tirand, Guillaume [1 ,2 ,3 ,4 ]
Arvieu, Corinne [1 ,2 ,3 ]
Lacoste, Eric [1 ,2 ,3 ]
Quenisset, Jean-Michel [1 ,2 ,3 ]
机构：
[1] Univ Bordeaux, I2M, UMR 5295, F-33400 Talence, France
[2] CNRS, I2M, UMR 5295, F-33400 Talence, France
[3] Arts & Metiers ParisTech, I2M, UMR 5295, F-33400 Talence, France
[4] ASTF Aero Serv Tolerie Fine Grp ALCEN, F-33692 Merignac, France
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2013年 / 213卷 / 03期
关键词：
Numerical modelling; Microstructure; Non ferrous metals alloys; Laser welding; Hot cracking; Thermal treatment; BEAM; MAGNESIUM; ABSORPTION; KEYHOLE; SILICON; ALLOY;
D O I：
10.1016/j.jmatprotec.2012.10.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Numerical modelling of laser welding in both conduction and keyhole modes is studied to highlight the influence of the main welding parameters on assembly performance. Numerical simulation enables the thermal history of assembly weld joints to be described. A hot cracking criterion is proposed. The model predicts that (1) a deviation in the localization of the shielding gas does not affect instability and that (2) fluctuations of the absorbed laser beam power generate cooling speed deviations. The results also demonstrate that laser welding in keyhole mode, when compared to laser welding in conduction mode, is more likely to induce higher cooling speeds, greater risks of hot cracking but better sensitivity to post weld age hardening heat treatment. (C) 2012 Published by Elsevier B.V.
引用
收藏
页码：337 / 348
页数：12
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