Journal
RARE METALS
Volume 40, Issue 10, Pages 2956-2963Publisher
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-020-01661-5
Keywords
Magnesium alloys; High-pressure die-cast; Mechanical property; Intermetallic phase
Funding
- National Natural Science Foundation of China [51701200, 11804030]
- Fundamental Research Funds for the Central Universities [3072020CF1009]
- Open Funds of the State Key Laboratory of Rare Earth Resource Utilization [RERU2020008, 2020012]
- Scientific and Technological Developing Scheme of Jilin Province [20200801048GH]
- Jilin Scientific and Technological Development Programs [20200201240JC]
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The new high-pressure die-cast (HPDC) Mg-4Al-3La-1Ca-0.3Mn (ALaX431) alloy achieves higher strength than existing HPDC Mg alloys, mainly due to the formation of fine grained structure, semi-continuous reticular structure, and nanoscale precipitates. Consequently, it has great potential for wide application.
A new high-pressure die-cast (HPDC) Mg-4Al-3La-1Ca-0.3Mn (ALaX431) alloy with high strength has successfully been fabricated. This HPDC alloy in peak-aged state exhibits tensile yield strength (TYS) of 220 MPa at room temperature and TYS of 145 MPa at 250 degrees C, higher than the corresponding strength of HPDC Mg alloys reported so far. These high strengths are mainly due to the formation of fine grained structure, semi-continuous reticular structure consisting of stable Al3La and (Mg,Al)(2)Ca particles along grain boundaries and numerous nanoscale Al2Ca precipitates within grains. Due to its higher strength than existing HPDC Mg alloys, the new developed alloy has great application potential.
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