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Materials 2017, 10(6), 596; doi:10.3390/ma10060596

Micro-Mechanical Response of an Al-Mg Hybrid System Synthesized by High-Pressure Torsion

1
Division of Materials Science and Engineering, Hanyang University, Seoul 04763, Korea
2
Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-1453, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Daolun Chen
Received: 10 May 2017 / Revised: 26 May 2017 / Accepted: 27 May 2017 / Published: 30 May 2017
(This article belongs to the Special Issue Advanced Nanoindentation in Materials)
View Full-Text   |   Download PDF [4363 KB, uploaded 30 May 2017]   |  

Abstract

This paper summarizes recent efforts to evaluate the potential for the formation of a metal matrix nanocomposite (MMNC) by processing two commercial bulk metals of aluminum and magnesium alloy through high-pressure torsion (HPT) at room temperature. After significant evolutions in microstructures, successful fabrication of an Al-Mg hybrid system was demonstrated by observing unique microstructures consisting of a multi-layered structure and MMNC. Moreover, the evolution of small-scale mechanical properties was examined through the novel technique of nanoindentation and the improvement in plasticity was estimated by calculating the strain rate sensitivity of the Al-Mg hybrid system after HPT. The present paper demonstrates that, in addition to conventional tensile testing, the nanoindentation technique is exceptionally promising for ultrafine-grained materials processed by HPT, where the samples may have small overall dimensions and include heterogeneity in the microstructure. View Full-Text
Keywords: intermetallic composite; grain refinement; hardness; high-pressure torsion; nanocomposite; nanoindentation; plasticity intermetallic composite; grain refinement; hardness; high-pressure torsion; nanocomposite; nanoindentation; plasticity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Kawasaki, M.; Jang, J.-I. Micro-Mechanical Response of an Al-Mg Hybrid System Synthesized by High-Pressure Torsion. Materials 2017, 10, 596.

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