Abstract
High-entropy particles reinforced 2024Al composites exhibit the advantages as prominent particulate performance and metal/metal interfacial strengthening, which is the focused topic in the field of advanced composites. In order to adjust the metastable state of solid-solute samples, a variety of aging treatments of FeCoNi1.5CrCu/2024Al composite were processed incorporating oil bath aging (OBA), deep cryogenic and magnetic field treatment (DCT and MFT) in order to adjust the metastable state of solid-solute samples. The results show that in comparison to sole optimized OBA(170 ℃×10 h) both the DCT and MFT accelerate the aging process, that is, the peak aging can be reached at a lower aging temperature(160 ℃×10 h，DCT-OBA) even a shorter aging time(160 ℃×8 h，MFT+OBA). The optimized DCT-OBA and MFT+OBA samples exhibit the similar characteristic as high compactness, high-density dislocations, voluminous nanometer sub-grains, massive GPB areas and plentiful fine precipitates, small-sized and uniformly distributed HEAP and tight-binding interface. The multiple strength and toughness of the composites are attributed to the significant improvement of comprehensive performance. In comparison to the SS one, the least amplification for the three optimized samples are 10.6 %(compactness), 57.1 %(microhardness),10.0 %(yield strength) and 86.1 %(maximum compression ratio).
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