期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2015.07.032
关键词
Mg-Gd-Y-Zn-Zr alloy; Hot rolling; LPSO phase; Mechanical properties; Ageing
类别
资金
- National Key Basic Research Program of China [2013CB632200]
- National Natural Science Foundation of China [51271063]
- China Scholarship Council (CSC), China Fund
An ultra-high strength and high ductility Mg-8.2Gd-3.8Y-1.02n-0.4Zr Mg alloy sheet was fabricated by vertical direct chill casting, extrusion, hot rolling and peak-ageing treatment. The peak-aged sheet shows tensile yield strength of 416 MPa, ultimate tensile strength of 505 MPa and superior elongation to failure of 12.8% at ambient temperature. The remarkable improvement of strength is ascribed to the fine beta phase precipitated within the grains, grains with strong basal texture and the dispersed long period stacking ordered (LPSO) phases located at the grain boundaries. (C) 2015 Elsevier B.V. All rights reserved.
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