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Evaluation of Critical Resolved Shear Stresses for Various Plastic Deformation Mechanisms To Understand Mechanical Properties of Magnesium-Yttrium Alloys

Published online by Cambridge University Press:  27 February 2015

T. Mineta  and
S. Miura
T. Mineta
Affiliation:
Graduate student, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628
S. Miura
Affiliation:
Faculty of Engineering, Hokkaido University, Sapporo 060-8628
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Abstract

In order to understand enhanced mechanical properties of magnesium-yttrium (Mg-Y) alloys, applied stresses which were required to operate independent plastic deformation mechanisms on various stress axes were evaluated. Moreover, for this analysis, mechanical tests including newly-established testing method “pure-shear test” were conducted to evaluate Critical Resolved Shear Stresses (CRSSes) for various plastic deformation mechanisms of Mg-Y solid solution alloy single crystals with various Y concentration. Relatively higher solid solution strengthening of dominant plastic deformation mechanisms such as basal slip and extension twin at room temperature, results in increase in the activation of non-basal slip system. By a simple analysis based on von-Mises criterion with experimental CRSS values, it is revealed that enhanced mechanical properties of Mg-Y alloys might be attributed to the decrease of difference in the activity of plastic deformation mechanisms by Y addition.

Keywords

Mgductilitystrength
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1741: Symposium AA – Synthesis, Processing and Mechanical Properties of Functional Hexagonal Materials , 2015 , mrsf14-1741-aa02-04
Copyright
Copyright © Materials Research Society 2015 

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