Stretching the engineering strain of high strength LPSO quaternary Mg-Y-Zn-Al alloy via integration of nano-Al2O3
作者： XingHe Tan , Winston Keat How Chee , Jimmy Kwok Weng Chan , Richard Wai Onn Kwok , Manoj Gupta
DOI: 10.1007/S10853-016-9742-9
关键词:
摘要: In the present study, an attempt is made for first time to reinforce long-period stacking ordered (LPSO) MgY1.06Zn0.76Al0.42 (at.%) alloy with 0.5, 1.0, and 1.5 vol% of nano-Al2O3 particles form nanocomposites. Microstructure characterization revealed ability in inhibiting formation 14H LPSO phases nanocomposites during solidification. Homogenization at 723 K (450 °C) 2 h led subsequent precipitation fine Mg-Y-Zn-Al precipitates (≤1 µm) The were established be active promoting dynamic recrystallization (DRX) α-Mg via particle-simulated nucleation extrusion, which was responsible weakening basal texture improving failure strain. As a result, strain significantly increased from 10.8 % monolithic beyond 15 highest strength among achieved NC5 (nanocomposite reinforced 0.5 particles).
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