Abstract
High pressure die casting Mg-Al-RE alloy has an intrinsic and macroscopic gradient structure regarding the grain size and the area fraction of second phase along the depth direction. Such gradient structure exhibits incompatible but continuous mechanical properties in regions of different depth from surface during uniaxial tension. An extra strain hardening and a higher strength are thus produced. The unique mechanical behaviors originate from the generation and accumulation of geometrically necessary dislocations promoted by the strain gradient.
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This work was supported by the National Key Research and Development Program of China (Grant No. 2016YFB0301001); and the National Natural Science Foundation of China (NSFC, Grant Nos. U1902220, 51374145, 51674166, 51074106, 50674067).
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Manuscript submitted September 10, 2019.
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Wei, J., Wang, Q., Yin, D. et al. Extra Strain Hardening in High Pressure Die Casting Mg-Al-RE Alloy. Metall Mater Trans A 51, 1487–1492 (2020). https://doi.org/10.1007/s11661-020-05656-w
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DOI: https://doi.org/10.1007/s11661-020-05656-w