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Development of High Strength and Toughness Non-Heated Al–Mg–Si Alloys for High-Pressure Die-Casting

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

Based on the 3 factors and 3 levels orthogonal experiment method, compositional effects of Mg, Si, and Ti addition on the microstructures, tensile properties, and fracture behaviors of the high-pressure die-casting Al-xMg-ySi-zTi alloys have been investigated. The analysis of variance shows that both Mg and Si apparently influence the tensile properties of the alloys, while Ti does not. The tensile mechanical properties are comprehensively influenced by the amount of eutectic phase (α-Al + Mg2Si), the average grain size, and the content of Mg dissolved into α-Al matrix. The optimized alloy is Al-7.49 Mg-3.08Si-0.01Ti (wt%), which exhibits tensile yield strength of 219 MPa, ultimate tensile strength of 401 MPa, and elongation of 10.5%. Furthermore, contour maps, showing the relationship among compositions, microstructure characteristics, and the tensile properties are constructed, which provide guidelines for developing high strength and toughness Al–Mg–Si–Ti alloys for high-pressure die-casting.

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Acknowledgements

This work is financially supported by the National Key Research and Development Program of China (No. 2016YFB0301001) and the Science & Technology Program of Zhaoqing (No. 2018K006).

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Authors and Affiliations

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

    Ling-Yang Yuan, Pan-Wen Han, Ghulam Asghar, Peng-Huai Fu & Li-Ming Peng

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

    Bao-Liang Liu, Peng-Huai Fu & Li-Ming Peng

  3. General Motors China Science Laboratory, Shanghai, 201206, China

    Jin-Ping Li & Bin Hu

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  1. Ling-Yang Yuan
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  2. Pan-Wen Han
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  3. Ghulam Asghar
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  4. Bao-Liang Liu
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  5. Jin-Ping Li
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  6. Bin Hu
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  7. Peng-Huai Fu
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  8. Li-Ming Peng
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Correspondence to Li-Ming Peng.

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Yuan, LY., Han, PW., Asghar, G. et al. Development of High Strength and Toughness Non-Heated Al–Mg–Si Alloys for High-Pressure Die-Casting. Acta Metall. Sin. (Engl. Lett.) 34, 845–860 (2021). https://doi.org/10.1007/s40195-020-01174-1

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  • DOI: https://doi.org/10.1007/s40195-020-01174-1

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