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首页> 外文期刊>Materials Science and Engineering >Grain structure and texture evolution during friction stir welding of thin 6016 aluminum alloy sheets
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Grain structure and texture evolution during friction stir welding of thin 6016 aluminum alloy sheets

机译：6016铝合金薄板摩擦搅拌焊过程中的晶粒组织和织构演变

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摘要

A "stop-action" technique was employed to study the grain structure and texture development during friction stir welding of thin 6016 aluminum sheets. The microstructural evolution ahead of the tool pin was found to be a complex process involving geometrical effects of strain as well as simultaneous development of continuous and discontinuous recrystallizations. At the circumference of the pin, the material flow was shown to be governed by the simple shear deformation induced by the rotating pin, which led to the formation of a pronounced {112}<110> simple shear texture. Beyond the pin, the material experienced additional hot deformation, possibly caused by the influence of the tool shoulder, and limited static annealing during the weld cooling cycle. As a result, a well-recrystallized grain structure having a characteristic {100}<100> cube texture finally developed in the stir zone.
机译：“停止动作”技术用于研究6016铝薄板摩擦搅拌焊接过程中的晶粒结构和织构发展。人们发现，工具销之前的微观结构演变是一个复杂的过程，涉及应变的几何效应以及连续和不连续再结晶的同时发展。在销的圆周上，材料流被显示为受旋转销引起的简单剪切变形支配，这导致形成明显的{112} <110>简单剪切纹理。除销钉之外，材料还会经历额外的热变形，这可能是由于刀肩的影响以及焊缝冷却周期中有限的静态退火所致。结果，最终在搅拌区中形成了具有特征性的{100} <100>立方织构的重结晶晶粒结构。

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