Effect of tool pin eccentricity on microstructural and mechanical properties of friction stir processed copper. (March 2021)

• Record Type: Journal Article
• Authors: Kumar, Harikishor; Prasad, Rabindra; Kumar, Parshant
• Is Part Of: Vacuum. Volume 185(2021)
• Publication Date: 2021-03
• Subjects: Copper -- Friction stir processing -- Tool pin eccentricity -- Microstructure -- Hardness -- Tensile properties; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2020.110037
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: In this study, microstructural features and mechanical properties developed in the stir zone (SZ) of copper was analysed while employing different pin eccentricities (0, 0.3 and 0.6 mm) during friction stir processing. Friction stir processing led to substantial grain refinement which further enhanced with pin eccentricity. Specimen processed with 0.3 mm of pin eccentricity displayed finer grain and hence highest hardness and tensile properties, associated to increased grain boundary strengthening. Highlights: Production of finer grains when processed with pin eccentricity Material softening increased with increased pin eccentricity Oversized pin eccentricity produced more heat and hence coarsening of grains Increment in hardness and tensile properties when processed with pin eccentricity