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

Title
Micro-Mechanical Response of an Al-Mg Hybrid System Synthesized by High-Pressure Torsion
Author
장재일
Keywords
intermetallic composite; grain refinement; hardness; high-pressure torsion; nanocomposite; nanoindentation; plasticity
Issue Date
2017-05
Publisher
MDPI AG
Citation
MATERIALS, v. 10, no. 6, Article no. 596
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.
URI
https://www.mdpi.com/1996-1944/10/6/596https://repository.hanyang.ac.kr/handle/20.500.11754/113939
ISSN
1996-1944
DOI
10.3390/ma10060596
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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