时效处理对55vol% SiCp/6061Al复合材料力学性能的影响

doi:10.13251/j.issn.0254-6051.2024.12.012

摘要/Abstract

摘要： 采用热等静压法制备55vol%SiC_p/6061Al复合材料,研究了170、180和190 ℃条件下时效处理对复合材料力学性能的影响规律。结果表明,制备态55vol%SiC_p/6061Al复合材料的硬度和弯曲强度分别为182.4 HBW和440 MPa。复合材料表现出典型的双峰时效现象和动力学加速行为,当时效温度由170 ℃升高至190 ℃时,峰时效硬度对应时间由2.5 h缩短至0.3 h。时效处理可以显著提升复合材料的力学性能。最优时效温度为180 ℃,其第一个峰时效态(1 h)复合材料硬度最大,为236.3 HBW,增幅29.6%;第二个峰时效态(4.5 h)复合材料弯曲强度最大,为612 MPa,增幅39.1%。

关键词: SiC_p/6061Al复合材料, 热等静压法, 时效处理, 硬度, 弯曲强度

Abstract: 55vol%SiC_p/6061Al composite was prepared by using hot isostatic pressing method. The effect of aging treatment at 170, 180, and 190 ℃ on the mechanical properties of the composite was investigated. The results show that the hardness and bending strength of the as-prepared composite are 182.4 HBW and 440 MPa, respectively. The composite exhibits typical double-peak aging behavior and dynamic acceleration phenomenon. As the aging temperature increases from 170 ℃ to 190 ℃, the time corresponding to the first peak aging decreases from 2.5 h to 0.3 h. The aging treatment can significantly improve the mechanical properties of the composite and the optimal aging temperature is 180 ℃. Correspondingly, the hardness of the composite aged for 1 h is the highest, which is 236.3 HBW, with an increment of 29.6%, while the bending strength of the composite aged for 4.5 h is the highest, which is 612 MPa, with an increment of 39.1%.

Key words: SiC_p/Al composite, hot isostatic pressing, aging, hardness, bending strength

中图分类号:

TB333

曹雷刚, 朱明雨, 杨越, 刘园, 崔岩. 时效处理对55vol% SiC_p/6061Al复合材料力学性能的影响[J]. 金属热处理, 2024, 49(12): 72-77.

Cao Leigang, Zhu Mingyu, Yang Yue, Liu Yuan, Cui Yan. Effect of aging on mechanical properties of 55vol% SiC_p/6061Al composite[J]. Heat Treatment of Metals, 2024, 49(12): 72-77.

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