Effects of Minor Zr and Sr on As-Cast Microstructure and Mechanical Properties of Mg-4Y-1.2Mn-1Zn (wt.%) Magnesium Alloy |
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| Authors: | Mingbo Yang Fusheng Pan Jia Shen Tao Zhou Caiyuan Qin |
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| Affiliation: | (1) Materials Science & Engineering College, Chongqing University of Technology, Chongqing, 400050, China;(2) National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing, 400030, China;(3) Key Laboratory of Automobile Components Manufacturing and Testing Technology of the Education Ministry, Chongqing University of Technology, Chongqing, 400054, China |
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| Abstract: | The effects of minor Zr and Sr on the as-cast microstructure and mechanical properties of the Mg-4Y-1.2Mn-1Zn (wt.%) alloy
were investigated using optical and electron microscopies, differential scanning calorimetry (DSC) analysis, and tensile and
creep tests. The microstructural results indicate that small additions of Zr and/or Sr to the Mg-4Y-1.2Mn-1Zn alloy do not
cause an obvious change in the morphology and distribution of the Mg12YZn phase in the alloy. The tensile and creep tests indicate that, although small additions of Zr and/or Sr to the Mg-4Y-1.2Mn-1Zn
alloy do not have obvious effects on the creep properties of the alloy, the tensile properties at room temperature and 300 °C
for the alloys added with Zr and/or Sr are improved. Among the Zr- and/or Sr-containing alloys, the alloy specifically added
with of 0.5 wt.% Zr + 0.1 wt.% Sr obtains the optimum tensile properties, and is followed by the alloys added with 0.5 wt.%
Zr and 0.1 wt.% Sr. |
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