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Author

Park, Sung Soo
Metal Alloy Design (MADe) Lab
Research Interests
  • Metals and alloys, materials properties (mechanical/physical/electrochemical/functional), biomedical implants, metals corrosion

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A theoretical prediction of twin variants in extruded AZ31 Mg alloys using the microstructure based crystal plasticity finite element method

Cited 3 times inthomson ciCited 5 times inthomson ci
Title
A theoretical prediction of twin variants in extruded AZ31 Mg alloys using the microstructure based crystal plasticity finite element method
Author
Shin, E. J.Jung, A.Choi, S. -H.Rollett, A. D.Park, Sung Soo
Keywords
AZ31 Mg alloys; Crystal plasticity; Crystal plasticity finite element method; Ex situ; Finite Element; Finite element meshes; Local fluctuations; Quasi-3D; Schmid factors; Stress field; Theoretical prediction; Twin variants; Uni-axial compression
Issue Date
201203
Publisher
ELSEVIER SCIENCE SA
Citation
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.538, no., pp.190 - 201
Abstract
A resolved shear stress (RSS) criterion and the microstructure-based-crystal plasticity finite element method (MB-CPFEM) were used to analyze the activation of twin variants in extruded AZ31 Mg alloys during ex situ uniaxial compression. The RSS criterion, which is simply based on the Schmid factor, failed to predict the activation of twin variants consisting of the second-highest RSS and the third-highest RSS. In contrast to the RSS criterion, the MB-CPFEM based on a quasi-3D finite element mesh successfully predicted the activation of twin variants consisting of the highest RSS and the second-highest RSS. The MB-CPFEM demonstrated that local fluctuation of the stress field induces the activation of twin variants with the second-highest RSS during uniaxial compression.
URI
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DOI
http://dx.doi.org/10.1016/j.msea.2012.01.028
ISSN
0921-5093
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