Abstract
Objectives: In this study, Friction Stir Processing method is used to decrease grain size and increase the materials strength. Methods/Analysis: Produced with this process are the production of parts with fine-grained structure without porosity, being environmentally friendly, availability and ease of having mechanical properties. Application of coarse grain copper in medical science is an important problem, because release of dangerous materials during the time, while this problem could be removed by decrease of grain size and increase its applications. Process varying conditions are included as size of tools shoulder, speed and number of passes, each one possesses its specific effects. Findings: By increasing of improvement speed and number of passes besides decrease of rotational speed, grain size decreased while strength and consolidation increased. Novelty/Improvement: Investigating the effects of friction stir processing on the mechanical and microstructure changes of copper.
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