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Influence of Silicon Addition on the Microstructure and Mechanical Properties of WE43 Alloy

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Abstract

The investigation aims to study the microstructure and mechanical property changes of various silicon added WE43 alloys. With the increase in Si addition, the Mg2Si phase forms randomly in grains apart from the formed neodymium and yttrium rich phases like Mg24Y5 and Mg41Nd5. The morphology of the eutectic Mg2Si phase changes to a tiny needle shape on 0.5% addition of silicon and upon 1%, it again transforms to a Chinese script phase when the addition increases above 1%, along with the formed eutectic Mg2Si phase, polygonal primary Mg2Si phase. Simultaneously, a new intermetallic was developed based on the quantity of silicon addition; at lower silicon addition, it’s a star-shaped compound and in higher addition, rare earth silicon intermetallic phase was formed, which is confirmed through scanning electron microscopy analyses. The hardness of WE43 alloy varies from 77 to 97 BHN; the YS (162 MPa), UTS (196 MPa) and % E (4.94%) gradually decline as silicon addition exceeds 1%. Silicon minimizes dislocations and strain flow locations, whereas the improved characteristics are likely due to solid solution strengthening and grain refinement.

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All the original data are available with the corresponding author.

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Acknowledgements

The authors are indebted to the casting and characterization tests like optical microstructure, hardness and tensile testing by MatRICS – Materials Research and Innovation Centric Solutions, Vellimalai, Kanyakumari District, 629 204, INDIA, Tel: +91 91766 06699; web: www.matricstech.com.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University College of Engineering, Nagercoil, India

    S. Muthukumar

  2. Department of Mechanical Engineering, Rohini College of Engineering and Technology, Palkulam, Kanyakumari, India

    K. K. Ajith Kumar

  3. Department of Mechanical Engineering, VV College of Engineering, Tisaiyanvilai, Tirunelveli, India

    J. Godwin

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  1. S. Muthukumar
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  2. K. K. Ajith Kumar
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  3. J. Godwin
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S. Muthu Kumar, K.K. Ajith Kumar and J.Godwin contributed to the design and implementation of the research and writing the manuscript.

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Correspondence to K. K. Ajith Kumar.

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Muthukumar, S., Ajith Kumar, K.K. & Godwin, J. Influence of Silicon Addition on the Microstructure and Mechanical Properties of WE43 Alloy. Silicon 15, 1535–1544 (2023). https://doi.org/10.1007/s12633-022-02166-9

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  • DOI: https://doi.org/10.1007/s12633-022-02166-9

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