Effect of Process Parameters on Microstructure and Micro-hardness of AZ91/Al2O3 Surface Composite Produced by FSP
Source abstract
Abstract
In this article, the effects of three different sizes of Al2O3 particles in the friction stir processing on grain size, cluster size, microstructure, and micro-hardness of as-cast magnesium alloy AZ91 were investigated. Moreover, the effects of two types of tool geometries and number of passes on the mentioned parameters were considered. Effect of mentioned parameters on microstructure, grain refinement, and micro-hardness profile in the friction stirred zone of the specimens was compared by as-cast received form and also friction stir processed (FSPed) specimens without particles. Microstructural characterization of the materials revealed reasonably uniform distribution of Al2O3 reinforcement and significant grain refinement. Hardness studies revealed that the incorporation of nano- and micro-size Al2O3 particulates in magnesium matrix led to a simultaneous increase in hardness.
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Research context
OpenAlex topics: Aluminum Alloys Composites Properties · Advanced Welding Techniques Analysis · Magnesium Alloys: Properties and Applications
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References (22)
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