Strain signatures associated to the formation of hot cracks during laser beam welding of aluminum alloys

被引：18
|
作者：
Hagenlocher, Christian [1 ,2 ]
Stritt, Peter [1 ,2 ]
Weber, Rudolf [1 ,2 ]
Graf, Thomas [1 ,2 ]
机构：
[1] Univ Stuttgart, Inst Strahlwerkzeuge IFSW, Pfaffenwaldring 43, D-70569 Stuttgart, Germany
[2] Univ Stuttgart, Stuttgart Ctr Photon Engn SCoPE, Pfaffenwaldring 43, D-70569 Stuttgart, Germany
来源：
OPTICS AND LASERS IN ENGINEERING | 2018年 / 100卷
关键词：
Hot cracks; Laser beam welding; Aluminum alloys; Digital image correlation; VISION;
D O I：
10.1016/j.optlaseng.2017.08.007
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The local surface displacement during the laser beam welding process of MgSi alloyed aluminum sheets (AA6014) in overlap configuration was optically determined near the weld seam by means of digital correlation of images recorded with a high-speed video camera. The analysis allowed the time- and space-resolved determination of the plane strain in the immediate vicinity of the solidification zone behind the weld pool. The observations revealed characteristic signatures in the temporal evolution of the strain that are related to the formation of centerline cracks in laser beam welding. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：131 / 140
页数：10
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