Microstructure and mechanical properties of 55%SiCp/2024Al composite during aging process

doi:10.13251/j.issn.0254-6051.2022.01.024

Abstract

Abstract: Effect of aging treatment on microstructure and mechanical properties of 55vol%SiC_p/2024Al composite prepared by hot-isostatic pressing (HIP) process and using SiC particles with average size of 12 μm and 2024 aluminum alloy powders with average size of 19 μm, was studied. The results show that there is a compact structure and good bonding between SiC and aluminum alloy of the HIP processed SiC_p/2024Al composite. The SiC_p/2024Al composite exhibits “double-peak phenomenon” in the aging treatment process. In comparison, the maximum hardness of the aged SiC_p/2024Al composite arrives earlier than that for the 2024Al alloy, and the main strengthening phases in the matrix are θ″ phase and S″ phase. Compared with as-sintered composite, the hardness and bending strength of the aged composite are improved from 255 HBW to 281 HBW and from 633 MPa to 747 MPa, respectively.

Key words: aluminum matrix composite, hot-isostatic pressing, aging, mechanical properties

CLC Number:

TB333.1⁺2

Cui Yan, Dong Heqian, Cao Leigang, Yang Yue, Meng Yi. Microstructure and mechanical properties of 55%SiC_p/2024Al composite during aging process[J]. Heat Treatment of Metals, 2022, 47(1): 142-148.

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Microstructure and mechanical properties of 55%SiC_p/2024Al composite during aging process

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