In-situ synthesis of Mg-based bulk metallic glass matrix composites with primary α-Mg phases
作者： Je In Lee , Eun Soo Park , Kook Noh Yoon , Wook Ha Ryu
DOI: 10.1016/J.JALLCOM.2021.160417
关键词:
摘要: Abstract Herein, we systematically investigate the in-situ synthesis and mechanical properties of Mg-based bulk metallic glass matrix composites (BMGMCs). From a well-known Mg65Cu25Gd10 former, series Mg65+xCu20-2x/3Zn5Gd10-x/3 (x=0-18 at.%) alloys are designed Mg-rich (> 77 at.% Mg) glassy/crystalline containing primary α-Mg phases successfully developed. Mg77Cu12Zn5Gd6 BMGMC (x=12 at.%) exhibits over two times higher compressive fracture strength (773±20.6 MPa) specific (2.6 × 105 N m kg-1) than commercial Mg such as AZ31 or AZ91. In particular, compared with monolithic BMGs, displays obvious yielding, serrated plastic flow strain 0.22±0.02%. This result is attributed to dispersed which prevent rapid propagation shear bands promote formation multiple bands. The crystalline (x=14-18 exhibit an enhancement in (from 0 1.51%) pronounced work hardening at expense yield (
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