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High cycle fatigue behavior of different regions in a low-pressure sand-cast GW103K magnesium alloy component

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Abstract

Different parts of a casting may receive different microstructures during cooling particularly for the large scale casting, which can affect the fatigue behavior. In the present study, in consideration of the safety and reliability, the microstructures, tensile properties, and high cycle fatigue behaviors of different regions in a low-pressure sand-cast Mg–10Gd–3Y–0.5Zr (GW103K) magnesium alloy component with large scale and complicated structure were investigated. The results showed that the tensile properties particularly ultimate tensile strength (UTS) and elongation (EL) varied with regions and the fatigue strength varied in a range from 100 to 115 MPa. In addition, crack initiation, crack propagation, and fracture behavior of the studied alloys after tensile test and high cycle fatigue test were also investigated systematically.

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ACKNOWLEDGMENTS

This work is sponsored by Shanghai Rising-Star Program (B type, 14QB1403200), National Natural Science Foundation of China (No. 51275295), Research Fund for the Doctoral Program of Higher Education of China (Nos. 20120073120011 and 20130073110052), and IPP program in SJTU (No. IPP7036).

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Authors and Affiliations

  1. National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Longkang Jiang, Wencai Liu, Yanlei Li, Guohua Wu & Wenjiang Ding

  2. Shanghai Light Alloy Net Forming National Engineering Research Center Co., Ltd, Shanghai, 201615, China

    Wencai Liu

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  1. Longkang Jiang
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  2. Wencai Liu
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  3. Yanlei Li
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  4. Guohua Wu
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  5. Wenjiang Ding
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Correspondence to Wencai Liu.

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Jiang, L., Liu, W., Li, Y. et al. High cycle fatigue behavior of different regions in a low-pressure sand-cast GW103K magnesium alloy component. Journal of Materials Research 29, 2587–2595 (2014). https://doi.org/10.1557/jmr.2014.286

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  • DOI: https://doi.org/10.1557/jmr.2014.286

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