Microstructure of the Joint of 1565chM Alloy Sheets Fabricated by Friction Stir Welding

被引：2
|
作者：
Ovchinnikov V.V. [1 ]
Badall N.N. [1 ]
机构：
[1] Moscow Polytechnic University, Moscow
来源：
Russian Metallurgy (Metally) | 2018年 / 2018卷 / 6期
关键词：
aluminum alloy; fragmented structure; friction stir welding; superplasticity;
D O I：
10.1134/S0036029518060162
中图分类号：
学科分类号：
摘要：
The microstructure in the joints of a non-heat-treatable aluminum–magnesium 1565chM alloy sheets fabricated by friction stir welding is studied. The structure near the interface between the base metal and a welded joint is examined. Friction stir welding results in a gradient structure with ultrafine grains at the center of the welded joint. The structure in the welded joint forms by the mechanism resulting in the formation of a layered ultrafine structure due to plastic deformation by shear and rotation of structural fragments. Layers are assumed to form due to the balance between the strain hardening and the softening caused by frictional heating and heat released during deformation. An analogy between the microstructure in the joint fabricated by friction stir welding and the microstructure formed by sliding friction is drawn. © 2018, Pleiades Publishing, Ltd.
引用
收藏
页码：552 / 556
页数：4
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