Abstract

Friction stir welding and processing are widely used for joining of aluminum alloys and composites and fabrication of aluminum matrix composites. However, the friction stirred plates possess different microstructural zones which create significant difference in local properties and heat treatment is required to establish uniformity. In this article, the state-of-the-art of heat treatment on FSWed/FSPed aluminum alloys is discussed. The effects of heat treatment time and temperature on microstructural appearances and mechanical properties are examined thoroughly. Special attention is provided on the change in the state of precipitates by different heat treatment processes. Also, the effects of different heat treatment techniques are compared. Finally, some ideas regarding direction of new research related to current topic are addressed.

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