异种镁合金搅拌摩擦搭接接头的组织演变与成形

T. Li, Zhenshan Wang
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引用次数: 1

摘要

对3mm厚AZ80挤压板和2.3mm厚AZ31B轧制板进行了搅拌摩擦搭接(FSLW)试验。讨论了锥螺纹混合头形状对微观组织的影响。分析了气孔形成、钩状缺陷、界面迁移和组织分布。由于相应的沿销螺纹的合力,熔核区两侧的组织(NZ)呈对角线以上布置。通过塑性微结构随销钉螺纹旋转,从混合头锥体凹处掉落,碰撞形成梯级“洋葱圈”。空腔缺陷与AZ80镁合金下部变形不良及组织碰撞有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Microstructure Evolution and Shaping of Friction Stir Lap WeldedDissimilar Magnesium Alloy Joint
Friction stir lap welding (FSLW) experiment has been conducted on 3mm thick AZ80 extruded sheet and 2.3mm thick AZ31B rolled sheet. The influence of the shape of the taper thread mixing head on microstructure has been discussed. Pores forming, hooked defects, interface migration, tissue distribution have been analyzed. The organization of both sides of nugget zone (NZ) is arranged diagonally above, due to the corresponding resultant force along the thread of pin. NZ was collided to form a cascade "onion ring" by plastic microstructure rotating with thread of the pin and dropping from concave of mixing head conical body. Cavity defect was concerned with the poor deformation of AZ80 magnesium alloy placed underneath and relevant organization collision.
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