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The effect of impurity level on ultrafine-grained microstructures and their stability in low stacking fault energy silver

Title
The effect of impurity level on ultrafine-grained microstructures and their stability in low stacking fault energy silver
Author
Megumi Kawasaki
Keywords
Severe plastic deformation; Equal-channel angular pressing; Silver; Stacking fault energy; Thermal stability
Issue Date
2011-10
Publisher
ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Citation
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 권: 528, 호: 29-30, 페이지: 8694-8699
Abstract
The effect of impurity content on the evolution of microstructure in low stacking fault energy silver processed by severe plastic deformation (SPD) was studied. The SPD-processing was carried out on 4N5 and 4N purity Ag samples by equal-channel angular pressing (ECAP) up to 16 passes. It was found that, although the minimum grain size and the maximum dislocation density were not affected by the different impurity atom content, there is a lower degree of twinning in the less pure material for high number of passes. The small increase of impurity level from 4N5 to 4N in Ag resulted in a significantly better thermal stability at room temperature for the ultrafine-grained microstructures obtained by ECAP. (C) 2011 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0921509311009191?via%3Dihub
ISSN
0921-5093
DOI
10.1016/j.msea.2011.08.034
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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