Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 759, Issue -, Pages 703-707Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2019.05.093
Keywords
Tensile-compression asymmetry; Heterogenous microstructure; AZ91 alloy; Equal channel angular pressing
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Funding
- Natural Science Foundation of Jiangsu Province [BK20160867, BK20160869]
- Fundamental Research Funds for the Central Universities [2017B12814, 2018B48414]
- National Natural Science Foundation of China [51774109, 51701065]
- China Postdoctoral Science Foundation [2016M591752]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1501041A]
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The tension-compression asymmetric mechanical behavior of the AZ91 magnesium alloy with multi-heterogenous microstructure was investigated in comparison with its cast counterpart. The individual effect of different deformation modes in fine and coarse grains are clarified to reveal the underlying mechanism behind the asymmetric yield behavior by electron back-scatter diffraction analysis. The result demonstrated that the mechanical twinning prevailing in coarse grains is responsible for the yield asymmetry of the multi-heterogeneous alloy.
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