Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 547, Issue -, Pages 93-98Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2012.03.087
Keywords
Mg-Gd-Y-Zn-Zr alloy; Large-strain hot rolling; Mechanical properties; Ageing
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Funding
- Ministry of Science and Technology (MOST), China [2010DFB50210, 2009QJB20003]
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Ultra high-strength Mg-8.2Gd-3.8Y-1.0Zn-0.4Zr alloy sheet was prepared by large-strain hot rolling and subsequent ageing process. The sheet exhibits excellent tensile properties at ambient temperature with ultimate tensile strength of 517 MPa, 0.2% proof stress of 426 MPa and elongation to failure of 4.5%. The notable improvement in strength is attributed to the dense distribution of the fine precipitates inside the grains, scattered precipitates at the grain boundaries, bimodal grain size distribution with fine recrystallized grains and large deformed grains with intense basal texture. (C) 2012 Elsevier B.V. All rights reserved.
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