期刊
ADVANCED ENGINEERING MATERIALS
卷 17, 期 6, 页码 876-884出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adem.201400369
关键词
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资金
- National Natural Science Foundation of China [51301048]
- Natural Science Foundation of Heilongjiang Province of China [QC2012C114]
- Postdoctoral Science-research Developmental Foundation of Heilongjiang Province [LBH-Q12129]
- Foundation of State Key Laboratory of Rare Earth Resources Utilization [RERU2013011]
- Fundamental Research funds for the Central Universities [HEUCFR1128]
- Natural Science Foundation of Jiamusi university of China [lq2014-003]
Due to low density and other features, magnesium (Mg) alloys are becoming one of key engineering structural materials for aerospace and automotive industries. In the meantime, conventional Mg alloys are limited because of their low mechanical properties, especially at high temperatures. In this study, a new Mg-12Ymm-4Zn (Ymm=Y-rich misch metal, wt%) extruded alloy was prepared by water-cooled mold casting and hot extrusion, and its ultimate tensile strength (UTS) and tensile yield strength (TYS) could reach 314 and 231MPa at 300 degrees C, which were slightly lower than those at room temperature (338 and 278MPa). To date, there is rare report on such high strength for Mg alloys at 300 degrees C, and it has been confirmed that introducing a large volume fraction of long-period stacking ordered (LPSO) phase in combination with nano-spaced stacking faults (SFs) is an effective pathway to develop deformed Mg alloys with high strength at elevated temperatures.
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