Effect of T6 and T6I4 Aging Treatments on Microstructure and Compressive Properties of Aluminum Metal Matrix Composites Reinforced by SiCw Via Squeeze Casting

IF 0.6 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Metal Science and Heat Treatment Pub Date : 2024-04-17 DOI:10.1007/s11041-024-01006-4

Tao Wei, Xiaojing Xu, Bin Zhang, Guoning Bao, Lele Liu, Shuaidi Li, Jianming Wu

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Abstract

The microstructure and compressive properties of the 7xxx series aluminum alloy (Al – 12.44Zn – 3.22Mg – 1.13Cu – 0.19Zr – 0.12Sr) reinforced with SiC whiskers via squeeze casting are investigated after aging treatments T6-1, T6-2, T6I4-1, and T6I4-2. For this purpose, the effect of four kinds of aging heat treatments on the properties of the aluminum metal matrix composites (AMMCs) is studied systematically through Vickers hardness and room temperature compressive testing. The microstructure is analyzed by optical microscopy, scanning electron microscopy, and x-ray diffraction. The experimental results show that the hardness of the AMMCs after four kinds of aging processes has different degrees of improvement compared to no-aging. After the T6-1, T6-2, T6I4-1, and T6I4-2 aging processes, the hardness of the composites is 325, 278, 306, and 345.8 HV, respectively. The additional T6-2 aging treatment provides the highest compressive strength and compressive strain, about 747 MPa and 7%, respectively, as well as a maximum dislocation strengthening of approximately 86.89 MPa.

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T6 和 T6I4 老化处理对挤压铸造 SiCw 增强铝金属基复合材料显微结构和压缩性能的影响

研究了通过挤压铸造用碳化硅晶须增强的 7xxx 系列铝合金（Al - 12.44Zn - 3.22Mg - 1.13Cu - 0.19Zr - 0.12Sr）在经过 T6-1、T6-2、T6I4-1 和 T6I4-2 时效处理后的微观结构和抗压性能。为此，通过维氏硬度和室温压缩测试系统地研究了四种老化热处理对铝金属基复合材料性能的影响。通过光学显微镜、扫描电子显微镜和 X 射线衍射分析了微观结构。实验结果表明，与未老化相比，经过四种老化处理的 AMMC 的硬度有不同程度的提高。经过 T6-1、T6-2、T6I4-1 和 T6I4-2 时效处理后，复合材料的硬度分别为 325、278、306 和 345.8 HV。额外的 T6-2 时效处理可提供最高的抗压强度和抗压应变，分别约为 747 兆帕和 7%，以及约 86.89 兆帕的最大位错强化。

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来源期刊

Metal Science and Heat Treatment 工程技术-冶金工程

CiteScore

1.20

自引率

16.70%

发文量

102

审稿时长

4-8 weeks

期刊介绍： Metal Science and Heat Treatment presents new fundamental and practical research in physical metallurgy, heat treatment equipment, and surface engineering. Topics covered include: New structural, high temperature, tool and precision steels; Cold-resistant, corrosion-resistant and radiation-resistant steels; Steels with rapid decline of induced properties; Alloys with shape memory effect; Bulk-amorphyzable metal alloys; Microcrystalline alloys; Nano materials and foam materials for medical use.