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Friction stir welding of aluminium alloys

机译：铝合金摩擦搅拌焊

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摘要

The comprehensive body of knowledge that has built up with respect to the friction stir welding (FSW) of aluminium alloys since the technique was invented in 1991 is reviewed. The basic principles of FSW are described, including thermal history and metal flow, before discussing how process parameters affect the weld microstructure and the likelihood of entraining defects. After introducing the characteristic macroscopic features, the microstructural development and related distribution of hardness are reviewed in some detail for the two classes of wrought aluminium alloy (non-heat-treatable and heat-treatable). Finally, the range of mechanical properties that can be achieved is discussed, including consideration of residual stress, fracture, fatigue and corrosion. It is demonstrated that FSW of aluminium is becoming an increasingly mature technology with numerous commercial applications. In spite of this, much remains to be learned about the process and opportunities for further research and development are identified.
机译：自1991年发明该技术以来，已经对铝合金的搅拌摩擦焊（FSW）积累了全面的知识。在讨论工艺参数如何影响焊缝微观结构和夹带缺陷的可能性之前，先描述了FSW的基本原理，包括热历史和金属流动。在介绍了特征性的宏观特征之后，对两类锻铝合金（不可热处理和可热处理）的显微组织发展和相关的硬度分布进行了详细的综述。最后，讨论了可以实现的机械性能范围，包括对残余应力，断裂，疲劳和腐蚀的考虑。事实证明，铝的FSW正在成为具有许多商业应用的日益成熟的技术。尽管如此，关于该过程还有很多要学习的地方，并确定了进一步研究和开发的机会。

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