Exploration of Trade-Off Between Elastic Modulus and Strength of Mg?Gd?Y?Nd?Zr Alloy by Regulating Intermetallic Phases Through Si Addition

Liqun Guan; Yunlai Deng; Yaofeng Luo; An Luo; Xiaobin Guo

doi:10.1007/s12540-020-00749-y

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자료유형: 학술저널

저자정보: Liqun Guan (Central South University) Yunlai Deng (Central South University) Yaofeng Luo (Central South University) An Luo (Central South University) Xiaobin Guo (Central South University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.10

발행연도: 2021.10

수록면: 3,740 - 3,749 (10page)

DOI: 10.1007/s12540-020-00749-y

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In this study, low-cost Si was added to an Mg?8Gd?4Y?1Nd?0.5Zr alloy to regulate the intermetallic phases. The mechanicalproperties of 0, 0.5, and 1.0 wt% Si-added alloys were studied to explore the trade-off between the elastic modulus andstrength. The microstructures were characterized through metallographic microscopy, scanning electron microscopy applyingenergy dispersive spectroscopy, and transmission electron microscopy. The microstructures demonstrated that Y5Si3and GdSi phases formed and consumed the solid soluble Gd and Y elements, thus reducing the amount of precipitation andincreasing the size of the β′ phase. Correlations between the elastic modulus and the intermetallic phase indicated that theY5Si3and GdSi phases formed by the addition of Si were the mainly responsible for the improvement in the elastic modulus. The change in strength through the addition of Si was calculated, and the results revealed that such an addition could increasethe elastic modulus but with a reduction in the alloy strength. The addition of 0.5 wt% Si alloy resulted in a relatively highcomprehensive performance, with an elastic modulus of 46 GPa, a tensile strength of 278 MPa, a yield strength of 226 MPa,and an elongation of 4.9% under a cast-T6 state.

#Magnesium alloys #Si addition #Intermetallic phases #Strength #Elastic modulus #Microstructure

참고문헌 (39)

참고문헌 신청

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N. Liu / 2015 / Mater. Sci. Eng., A 223:627

Y. Wan / 2018 / Mater. Letters 274:213

C. Tang / 2019 / Mater. Sci. Eng., A 172:759

X. Zhou / 2018 / J. Alloy. Compd 878:749

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