Rajendran, A and Nadammal, N and Singh, K and Kailas, SV (2021) Effect of axial load-dependent deformation rate on the grain size distribution and mechanical properties of friction stir processed copper. In: Materials Performance and Characterization, 10 (2).
Full text not available from this repository.Abstract
During friction stir processing (FSP), the combination of rotation and movement of the tool leads to frictional heat generation and plastic deformation at the tool-material contact surface, leading to a microstructurally refined formation region. The deformation rate in the material can be altered by varying the axial load by increasing or decreasing the tool's plunging depth. In the present study, FSP was carried out on a pure copper plate of 3-mm thickness by varying the plunge depth from 2.3 to 2.6 mm for a tool pin length of 2.4 mm. The microstructure of the processed samples was studied by optical microscopy, and the grain size was measured by the linear intercept method. Tensile testing was carried out perpendicular to the processing direction. The grain size distribution was narrower at low axial loads and wider at the higher axial loads, measured between 1 and 120 μm. At higher axial loads, microstructure consisted of bands indicative of the heterogeneity in the deformation. The formation of bands at higher axial loads leads to improved mechanical properties. The ductility of the processed materials at higher axial loads was 16, which was four times the increase observed at lower axial loads (4). The formation of a bi-modal microstructure (alternating layers of fine and coarse grains) at high axial load enhanced the processed materials' strength and ductility. © 2021 by ASTM International.
| Item Type: | Journal Article |
|---|---|
| Publication: | Materials Performance and Characterization |
| Publisher: | ASTM International |
| Additional Information: | The copyright for this article belongs to Authors |
| Keywords: | Ductility; Friction; Grain size and shape; Microstructure; Size distribution; Tensile testing, Alternating layers; Bi-modal microstructures; Friction stir processing; Frictional heat generation; Grain size distribution; Load-dependent deformations; Processed materials; Strength and ductilities, Axial loads |
| Department/Centre: | Division of Mechanical Sciences > Mechanical Engineering |
| Date Deposited: | 12 Jul 2021 11:49 |
| Last Modified: | 12 Jul 2021 11:49 |
| URI: | http://eprints.iisc.ac.in/id/eprint/68813 |
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