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Cited 14 time in webofscience Cited 13 time in scopus
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Hollow cone high-pressure torsion: Microstructure and tensile strength by unique severe plastic deformation

Title
Hollow cone high-pressure torsion: Microstructure and tensile strength by unique severe plastic deformation
Authors
Ho Yong UmEun Yoo YoonDong Jun LeeLee, CSLee Ju ParkLee, SKim, HS
POSTECH Authors
Lee, CSLee, SKim, HS
Date Issued
Jan-2014
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Abstract
Hollow cone high-pressure torsion (HC-HPT) is proposed as a new severe plastic deformation to produce ultrafine-grained (UFG)/nanocrystalline microstructure materials. UFG Cu with an average grain size of 550 nm and well-developed high-angle grain boundary after HC-HPT of only 1 turn of torsion exhibited a high tensile strength of 414 MPa and a fracture elongation of 25%. A higher plastic deformation in the inner region, the unique deformation mode of HC-HPT, was analyzed using the finite element method. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Keywords
Severe plastic deformation (SPD); High-pressure torsion; Ultrafine grained microstructure; Tension test; Finite element analysis; MECHANICAL-PROPERTIES; GRAIN-REFINEMENT; PURE COPPER; CU; PRINCIPLES; DUCTILITY
URI
http://oasis.postech.ac.kr/handle/2014.oak/14177
DOI
10.1016/J.SCRIPTAMAT.2013.09.032
ISSN
1359-6462
Article Type
Article
Citation
SCRIPTA MATERIALIA, vol. 71, page. 41 - 44, 2014-01
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 LEE, SUNG HAK
Dept of Materials Science & Enginrg
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