ABSTRACT

In this study, Al_0.5CoCrFeNi high-entropy alloy particles (HEAp) were added to aluminum alloy 2024 to prepare aluminum alloy matrix composites. The composites were prepared via melting, casting, and subsequent rolling (hot rolling, cold rolling, or cryorolling). The results reveal that the adding of HEAp can significantly refine the grains during casting. The cryorolled AA2024 matrix composite with 1 weight percent HEAp content had a tensile strength of 543 MPa and 10% elongation. The Al-Cu crystalline phase of the aluminum matrix composites was more finely dispersed after the addition of an appropriate HEAp content and cryorolling, which led to an increase in both strength and ductility.

摘要

本研究将Al _0.5 CoCrFeNi高熵合金颗粒（HEAp）添加到铝合金2024中制备铝合金基复合材料。通过熔化、铸造和随后的轧制（热轧、冷轧或低温轧制）制备复合材料。结果表明，HEAp的加入可以显着细化铸造过程中的晶粒。具有 1 重量百分比 HEAp 含量的冷冻轧制 AA2024 基复合材料具有 543 MPa 的拉伸强度和 10% 的伸长率。在添加适当的 HEAp 含量和低温轧制后，铝基复合材料的 Al-Cu 结晶相分散得更细，从而提高了强度和延展性。