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摘要:
Few studies were reported on the phases'relationships of AE44(Mg-4.0Al-4.1RE-0.3Mn,wt.%)and its composites.In this work,AE44 alloy and Saffil(6-Al2O3)/AE44 Metal matrix composite(MMC)were both prepared by slow shot high pressure die casting(SS-HPDC)technology and their phase constitutions were all studied in detail using experimental techniques combined with CALPHAD(Calculation of Phase Diagram)modeling.The results revealed that the alloy consists of the a-Mg matrix,A1hRE3 intermetallic phase,and one trace phase AI3RE,while the composite contains five major phases:a-Mg,5-AI2O3,AI3RE,MgO and Mg2Si.and two trace phases of A12RE and AI11RE3,respectively.A1hRE3 is partly derived from ALRE,while A13RE is a product of the peritectoid reaction between the two precipitates.The presence of MgO and Mg2Si is due to the interfacial reaction between the SiO2 binder in the fiber preforms and the molten magnesium during infiltration.The use of SiO2 binder in the preform manufacturing was limited/minimized to reduce the MgO formation in the MMC casting process,which can be detrimental to the fatigue performance of the MMC materials.
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篇名 Microstructural evolution of Mg-Al-Re alloy reinforced with alumina fibers
来源期刊 镁合金学报(英文) 学科 工学
关键词 Mg-Al-RE Magnesium composite Slow shot high pressure die casting Microstructure CALPHAD AlxREy
年,卷(期) 2020,(3) 所属期刊栏目
研究方向 页码范围 565-577
页数 13页 分类号 TG1
字数 语种
DOI
五维指标
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研究主题发展历程
节点文献
Mg-Al-RE
Magnesium
composite
Slow
shot
high
pressure
die
casting
Microstructure
CALPHAD
AlxREy
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研究来源
研究分支
研究去脉
引文网络交叉学科
相关学者/机构
期刊影响力
镁合金学报(英文)
季刊
2213-9567
50-1220/TF
174 Shazheng Str., C
出版文献量(篇)
153
总下载数(次)
1
总被引数(次)
0
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