Acta Metallurgica Sinica (English Letters) ›› 2022, Vol. 35 ›› Issue (6): 879-889.DOI: 10.1007/s40195-021-01351-W

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Enhanced Mechanical Properties of AA5083 Matrix Composite via Introducing Al0.5CoCrFeNi Particles and Cryorolling

Hao Gu1,2, Zhide Li1,4, Kaiguang Luo1,2, Laxman Bhatta1,2, Hanqing Xiong1,2, Yun Zhang1,2(), Charlie Kong3, Hailiang Yu1,2,4()   

  1. 1State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 4 10083, China
    2College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
    3Mark Wainwright Analytical Center, University of New South Wales, Sydney, NSW 2052, Australia
    4Light Alloys Research Institute, Central South University, Changsha 410083, China
  • Received:2021-06-11 Revised:2021-08-18 Accepted:2021-08-30 Online:2022-06-10 Published:2022-06-15
  • Contact: Yun Zhang,Hailiang Yu
  • About author:Hailiang Yu, yuhailiang@csu.edu.cn
    Yun Zhang, yunzhang@csu.edu.cn;

Abstract:

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.

Key words: Metal matrix composite, Cryorolling, Mechanical properties, High-entropy alloy particle