Laser welding of dissimilar copper and aluminum sheets by shaping the laser pulses

被引：35

作者：

Mathivanan, Karthik ^{[1
]}

Plapper, Peter ^{[1
]}

机构：

[1] Univ Luxembourg, 6 Rue Richard Coudenhove Kalergi, L-1359 Luxembourg, Luxembourg

来源：

17TH NORDIC LASER MATERIALS PROCESSING CONFERENCE (NOLAMP17) | 2019年 / 36卷

关键词：

Laser welding; Dissimilar metal joining; Cu-Al joints; Intermettalic compounds (IMC); Pulse modulation;

D O I：

10.1016/j.promfg.2019.08.021

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dissimilar metal joining of thin copper and aluminum sheets is very important in the battery connections. The main problem while joining this dissimilar combination is formation of brittle intermetallic phases that degrade the electrical and mechanical properties of the joint. For joining copper and aluminum sheet with laser, very high intensity in the range of 10(7) W/cm(2) is required. Intermixture of copper and aluminum is vital for joint ductility. In this paper, the effect of combined oscillation and shaping of the laser pulses on the overlap welding of copper-aluminum is studied. Precise control of intermixing can be achieved by modifying the laser pulse i.e. the percentage of power with respect to the pulse time. Investigation on different pulse shapes with ramp up and ramp down profile is conducted by cross-section and microstructural analysis. (C) 2019 The Authors. Published by Elsevier B.V.

引用

页码：154 / 162

页数：9

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