期刊
ACTA METALLURGICA SINICA-ENGLISH LETTERS
卷 35, 期 6, 页码 879-889出版社
CHINESE ACAD SCIENCES, INST METAL RESEARCH
DOI: 10.1007/s40195-021-01351-w
关键词
Metal matrix composite; Cryorolling; Mechanical properties; High-entropy alloy particle
资金
- National Key Research and Development Program [2019YFB2006500]
- Huxiang High-Level Talent Gathering Project of HUNAN Province [2018RS3015]
- Innovation Driven Program of Central South University [2019CX006]
- Science and Technology Innovation Program of Hunan Province [2020RC2002]
- Natural Science Foundation of Hunan Province [2021JJ40774]
- Fundamental Research Funds for the Central Universities of Central South University [2021zzts0150]
- Research Fund of the Key Laboratory of High Performance Complex Manufacturing at Central South University
The mechanical properties of AA5083/Al0.5CoCrFeNi HEAPs MMCs were significantly enhanced by adding HEAPs. The mechanical properties of the MMCs sheets were further improved after hot rolling and cryorolling treatments.
High-entropy alloy particles (HEAPs) can markedly enhance the mechanical properties of metal matrix composites (MMCs). In this study, AA5083/Al0.5CoCrFeNi HEAPs MMCs with different HEAPs contents (0, 1, and 3 wt%) were prepared via a stir-casting, and then these MMCs sheets were hot rolled (573 K) and cryorolled (77 K), respectively. The mechanical properties of the MMCs sheets were measured by tensile testing and microhardness test. Additionally, their microstructures were analyzed by scanning electron microscopy and transmission electron microscopy. Results revealed that the ultimate tensile strength (UTS) of the as-cast AA5083/Al0.5CoCrFeNi HEAPs MMCs were improved from 203 to 257 MPa by adding 3 wt% HEAPs. And the mechanical properties of the MMCs sheets were improved after cryorolling. After cryorolling with 50% rolling reduction ratio, the MMCs with 1 wt% HEAPs had an UTS of 382 MPa, which was 1.9 times that of the MMCs before rolling. Finally, the strengthening mechanisms of HEAPs and cryorolling on the AA5083/HEAPs MMCs were discussed.
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