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Micro‐Mechanical Behavior of an Exceptionally Strong Metal Matrix Nanocomposite Processed by High‐Pressure Torsion
Author(s) -
Ahn Byungmin,
Lee HanJoo,
Choi InChul,
Kawasaki Megumi,
Jang JaeIl,
Langdon Terence G.
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500520
Subject(s) - materials science , nanocomposite , torsion (gastropod) , alloy , composite material , metal , matrix (chemical analysis) , severe plastic deformation , high pressure , metallurgy , thermodynamics , medicine , surgery , physics
This research describes the micro‐mechanical behavior of an Al–Mg alloy system synthesized from two separate commercial Al‐1050 and ZK60 alloys through the application of high‐pressure torsion (HPT) for five turns at room temperature. The essential mechanical characteristics of the alloys are observed at the corresponding phases in a multi‐layered structure at the disk center but the edge contains a metal matrix nanocomposite (MMNC) exhibiting an apparent plastic instability and decreasing strain rate sensitivity under strain rates of 10 −4 −10 −3 s −1 . The results demonstrate a significant opportunity for using HPT processing to prepare new alloy systems involving a wide range of MMNCs.