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Thermal Analysis and Phase Formation in Mg-rich Mg–Sn–Gd Alloys

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Abstract

Mg–Sn–Gd alloys can be considered prospective contenders for creep applications owing to the formation of thermally stable phases. In the present investigation, the solidification behaviour of Mg–Sn–Gd alloys was analysed from cooling curves obtained from thermal analysis within the temperature range of 700–300 °C. The phase evolution as a function of Sn and Gd content was studied by varying the ratio of Sn to Gd (Sn/Gd) at three levels (0.5, 1, and 2) up to a maximum concentration of 3 wt% Sn and Gd, respectively. The phases in the as-cast microstructure were compared with the phases predicted by a commercially available thermodynamic database, and a deviation was observed. The results indicated that the addition of Sn and Gd promoted the formation of a ternary MgSnGd phase. Moreover, the presence of the MgSnGd phase in the microstructure led to significant grain refinement, and its role as a potential grain refiner has been recognized.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan, India

    Rohit Shandley, K. R. Ravi & Appala Naidu Gandi

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  1. Rohit Shandley
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  2. K. R. Ravi
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  3. Appala Naidu Gandi
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Correspondence to K. R. Ravi.

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Shandley, R., Ravi, K.R. & Gandi, A. Thermal Analysis and Phase Formation in Mg-rich Mg–Sn–Gd Alloys. Trans Indian Inst Met (2023). https://doi.org/10.1007/s12666-023-03166-y

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