Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 893, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.162370
Keywords
Metal matrix composite; High-entropy alloy particle; Cryorolling; Mechanical property; Microvoid
Categories
Funding
- National Key Research and Development Program, China [2019YFB2006500]
- Innovation Driven Program of Central South University, China [2019CX006]
- Science and Technology Innovation Program of Hunan Province, China [2020RC2002]
- Research Fund of the Key Laboratory of High Performance Complex Manufacturing at Central South University, China
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AA1050 metal matrix composites (MMCs) reinforced by Al0.5CoCrFeNi high-entropy alloy particles (HEAp) were prepared using stir casting and subsequent rolling techniques. The addition of 3 wt% HEAp led to a significant increase in ultimate tensile strength compared to AA1050. Cryorolling showed better mechanical properties than room temperature rolling, with increasing differences in mechanical properties observed with higher rolling deformation and lower HEAp content. The presence of voids in MMCs after room temperature rolling was not observed in cryorolled MMCs, highlighting the impact of cryogenic temperatures on microvoids and mechanical properties.
AA1050 metal matrix composites (MMCs) reinforced by Al0.5CoCrFeNi high-entropy alloy particles (HEAp) were prepared by stir casting and subsequent rolling (room temperature rolling (RTR) and cryorolling (CR)). The mechanical properties and microstructures of the AA1050-HEAp MMCs were studied. By adding 3 wt% HEAp, the ultimate tensile strength of the stir-casted AA1050-HEAp MMCs increased by 74.3% compared with AA1050. After rolling, the mechanical properties of the CR AA1050-HEAp MMCs were better than those obtained by RTR. The differences of the mechanical properties of the AA1050-HEAp MMCs obtained by CR and RTR increased with a higher rolling deformation and a lower mass fraction of HEAp. After RTR, there were various voids in AA1050-HEAp MMCs, which were not observed in CR MMCs through both scanning electron microscopy and transmission electron microscopy. Finally, the effect of cryogenic temperature on microviods and mechanical properties of MMCs were discussed. (C) 2021 Elsevier B.V. All rights reserved.
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