On the Prediction of Hot Tearing in Al-to-Steel Welding by Friction Melt Bonding

被引：0
|
作者：
N. Jimenez-Mena
P. J. Jacques
J. M. Drezet
A. Simar
机构：
[1] Université Catholique de Louvain,iMMC
[2] École Polytechnique Fédérale de Lausanne,IMAP
[3] IMX,undefined
来源：
Metallurgical and Materials Transactions A | 2018年 / 49卷
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摘要：
Aluminum alloy AA6061 was welded to dual-phase steel 980 (DP980) by the friction melt bonding (FMB) process. Hot tears have been suppressed by controlling the thermomechanical cycle. In particular, the welding speed and the thermal conductivity of the backing plate have been optimized. A finite-element thermomechanical model coupled with the Rappaz–Drezet–Gremaud (RDG) criterion has been used to explain these experimental observations. The hot tear susceptibility has been reduced with large thermal gradients and with the formation of a cellular microstructure. Both effects are favored by a backing plate made of a material with high thermal conductivity, such as copper.
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页码：2692 / 2704
页数：12
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