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The Effect of Sr Addition on Hot Tearing Susceptibility of Mg-1Ca-xSr Alloys

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Abstract

The hot tearing susceptibility of Mg-1Ca-xSr (x=0, 0.2, 0.4, 0.6, wt.%) alloys was investigated by CRC mold with a contraction force measurement system with a load cell and a temperature monitor. The results showed that the hot tearing susceptibility of Mg-1Ca-xSr alloys significantly improved with increasing of Sr content. Especially in Mg-1Ca-0.6Sr alloy, no visible tear was found on the casting sample. The force dropped and the final force value from the time-force-temperature curve derived from the hot tearing instruments could reflect the hot tearing susceptibility of different alloys. The mechanism of improved hot tearing resistance of Mg-1Ca-xSr alloys was clarified. In addition to susceptible temperature range and eutectic liquid fraction, it is found that the formation tendency of divorced eutectic also plays an important role on the hot tearing behavior of Mg-1Ca-xSr alloys.

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Acknowledgment

The present work was supported by the National Natural Science Foundation of China (No. U2037601, 52071036) and the Fundamental Research Funds for the Central Universities Project (No. 2020CDJQY-A002).

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Authors and Affiliations

  1. National Engineering Research Center for Magnesium Alloy, Chongqing University, 400044, Chongqing, China

    Hua Zhao, Jiangfeng Song, Bin Jiang, Hong Yang, Biquan Xiao, Qiang Liu, Zhiyuan Yang, Xuejiao Jia, Jinge Liao, Liangyin Wu & Fusheng Pan

  2. State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University, 400044, Chongqing, China

    Jiangfeng Song, Bin Jiang & Fusheng Pan

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  1. Hua Zhao
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Zhao, H., Song, J., Jiang, B. et al. The Effect of Sr Addition on Hot Tearing Susceptibility of Mg-1Ca-xSr Alloys. J. of Materi Eng and Perform 30, 7645–7654 (2021). https://doi.org/10.1007/s11665-021-05925-8

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