Influence of Zn coating on friction stir spot welded magnesium-aluminium joint
Influence of Zn coating on friction stir spot welded magnesium-aluminium joint
复制标题
Zn镀层对搅拌摩擦点焊镁铝接头的影响
DOI：
10.1080/13621718.2016.1266735
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发表时间：
2017
影响因子：
3.3
通讯作者：
Ma Z. Y.
中科院分区：
文献类型：
--
作者：
Xu R. Z.;Ni D. R.;Yang Q.;Liu C. Z.;Ma Z. Y.
镁铝搅拌摩擦点焊接头中，由于弯钩区Mg-Al金属间化合物的形成和界面开裂严重影响了接头的强度，接头载荷仅为0.8 ± 0.2kN。在铝基体表面镀Zn层后，在接头肩部形成了由Mg-Zn扩散区和Al-Zn扩散区组成的钎焊层，在钩状区形成了由MgZn 2、富Zn区和残余Zn组成的过渡层，消除了未镀Zn层的接头裂纹和Mg-Al金属间化合物。具有Zn涂层的接头的载荷增加到3.7 ± 0.3kN。
For friction stir spot welded (FSSW) magnesium–aluminium joints, the formation of Mg–Al intermetallics in the hook region and cracking at the interface damaged seriously the strength of Mg–Al joints, resulting in lower joint load of only 0.8 ± 0.2 kN. When adding the hot-dipped Zn coating on the Al substrate surface prior to FSSW, a brazed layer, composed of Mg–Zn and Al–Zn diffusion zones at the edge of the shoulder, and a transition layer, composed of MgZn2, Zn-rich zone and residual Zn in the hook region, were formed in the FSSW Mg–Al joint, eliminating the cracking and Mg–Al intermetallics in the FSSW joint without the Zn coating. The load of the joint with the Zn coating increased to 3.7 ± 0.3 kN.