| 55%SiCp/2024Al复合材料时效过程的微观组织与力学性能 |
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| 引用本文： | 崔岩,董和谦,曹雷刚,杨越,蒙毅.55%SiCp/2024Al复合材料时效过程的微观组织与力学性能[J].金属热处理,2022,47(1):142-148. |
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| 作者姓名： | 崔岩 董和谦 曹雷刚 杨越 蒙毅 |
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| 作者单位： | 北方工业大学 机械与材料工程学院, 北京 100144 |
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| 基金项目： | 国家重点研发计划(2017YFB0703102)；;北京市优秀人才培养资助青年骨干个人项目(2016000020124G015)； |
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| 摘 要： | 选用粒径为12 μm的SiC颗粒和19 μm的2024铝合金粉末,采用热等静压工艺制备体积分数为55%的SiCp/2024Al复合材料,研究固溶时效处理对SiCp/2024Al复合材料微观组织和力学性能的影响。结果表明,真空热等静压法制备的复合材料组织致密,SiC颗粒与铝合金结合良好。时效过程中SiCp/2024Al复合材料呈现出双峰时效行为,与铝合金相比,复合材料提前达到峰时效状态,此时基体中主要强化相为θ″相与S″相。与烧结态相比,复合材料硬度从255 HBW提高到281 HBW,抗弯强度从633 MPa提高到747 MPa。
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| 关 键 词： | 铝基复合材料 热等静压 时效 力学性能 |
| 收稿时间： | 2021-08-29 |
Microstructure and mechanical properties of 55%SiC;/2024Al composite during aging process |
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| Cui Yan,Dong Heqian,Cao Leigang,Yang Yue,Meng Yi.Microstructure and mechanical properties of 55%SiC;/2024Al composite during aging process[J].Heat Treatment of Metals,2022,47(1):142-148. |
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| Authors: | Cui Yan Dong Heqian Cao Leigang Yang Yue Meng Yi |
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| Affiliation: | School of Mechanical and Materials Engineering, North China University of Technology, Beijing 100144, China |
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| Abstract: | Effect of aging treatment on microstructure and mechanical properties of 55vol%SiCp/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 SiCp/2024Al composite. The SiCp/2024Al composite exhibits “double-peak phenomenon” in the aging treatment process. In comparison, the maximum hardness of the aged SiCp/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. |
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| Keywords: | aluminum matrix composite hot-isostatic pressing aging mechanical properties |
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