Hardness development of mechanically-bonded hybrid nanostructured alloys through high-pressure torsion

Kawasaki, Megumi and Langdon, Terence G (2021) Hardness development of mechanically-bonded hybrid nanostructured alloys through high-pressure torsion. Materials Science Forum, 1016, 177-182. (doi:10.4028/www.scientific.net/MSF.1016.177).

Record type: Article

Abstract

Processing through the application of high-pressure torsion (HPT) provides significant grain refinement in bulk metals at room temperature. These ultrafine-grained (UFG) materials after HPT generally demonstrate exceptional mechanical properties. Recent reports demonstrated the bulk-state reactions for mechanical bonding of dissimilar lightweight metal disks to synthesize hybrid alloy systems by utilizing conventional HPT processing. Accordingly, the present report provides a comprehensive summary of the recent work on processing of several UFG hybrid alloy systems including Al-Mg and Al-Cu by HPT under 6.0 GPa at room temperature and a special emphasis was placed on understanding the evolution of hardness. This study demonstrates a significant opportunity for the application of HPT for a possible contribution to current enhancements in diffusion bonding, welding and mechanical joining technologies as well as to an introduction of hybrid engineering nanomaterials.

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Megumi-THERMEC2020 - Accepted Manuscript

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Accepted/In Press date: 14 May 2020

Published date: January 2021

Additional Information: Funding Information: This work was supported by the National Science Foundation of the United States under Grant No. DMR-1810343 (MK) and the European Research Council under ERC Grant Agreement No. 267464-SPDMETALS (TGL). Publisher Copyright: © 2021 Trans Tech Publications Ltd, Switzerland.

Keywords: Hardness, High-pressure torsion, Intermetallic compounds, Mechanical bonding, Metal-matrix composite