Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 660, Issue -, Pages 252-257Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.11.098
Keywords
Magnesium alloys; LPSO phase; Mechanical properties; Ideal microstructure
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Funding
- Chinese Scholarship Council (CSC) [2011623076]
- National Natural Science Foundation of China [51401124, 51401172]
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Mg-RE alloys containing long period stacking ordered (LPSO) phases usually exhibit excellent mechanical properties while the effect of LPSO phases on mechanical properties is still in dispute. To clarify the intrinsic effect of LPSO phases in Mg-RE alloys, we investigated two selected Mg-RE alloys through microstructure manipulation. The experimental results indicate that the LPSO phases can not only inhibit the coarsening of predominant strengthening beta' phase with a c-axis base-centred orthogonal (cbco) structure, but also accommodate basal dislocations during plastic deformation. Therefore, smart alloy design by incorporating the LPSO and beta' phases synergistically has great potential to achieve optimized mechanical properties with high strength, high ductility and high creep resistance in Mg-RE based alloys. (C) 2015 Elsevier B.V. All rights reserved.
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