不同凝固冷却速率下制备的Al–15Mg<sub>2</sub>Si复合材料的力学性能

E. Safary; R. Taghiabadi; M.H. Ghoncheh

doi:10.1007/s12613-020-2244-4

Volume 29 Issue 6

Jun. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(6): 1249-1260

E. Safary, R. Taghiabadi, and M.H. Ghoncheh, Mechanical properties of Al–15Mg₂Si composites prepared under different solidification cooling rates, Int. J. Miner. Metall. Mater., 29(2022), No. 6, pp. 1249-1260. https://doi.org/10.1007/s12613-020-2244-4

Cite this article as:

E. Safary, R. Taghiabadi, and M.H. Ghoncheh, Mechanical properties of Al–15Mg2Si composites prepared under different solidification cooling rates, Int. J. Miner. Metall. Mater., 29(2022), No. 6, pp. 1249-1260. https://doi.org/10.1007/s12613-020-2244-4

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研究论文

不同凝固冷却速率下制备的Al–15Mg₂Si复合材料的力学性能

1)
Department of Materials Science and Metallurgy, Imam Khomeini International University, Qazvin, Iran
2)
Department of Mechanical Engineering, University of New Brunswick, Fredericton, NB, Canada

通讯作者:
R. Taghiabadi E-mail: taghiabadi@ikiu.ac.ir

中文摘要

本文研究了不同的冷却速率(2.7、5.5、17.1和57.5°C/s)对Al–15Mg₂Si复合材料的凝固参数、显微组织和力学性能的影响。结果表明，高冷却速率使Mg₂Si颗粒细化，形貌更加致密，微裂纹倾向降低。随着冷却速率从2.7℃/s增加到57.5℃/s，原始Mg₂Si颗粒的平均半径和含量分别从20 µm和13.5%下降到约10 µm和7.3%。提高冷却速率还改善了微成分的分布，降低了晶粒尺寸和微孔的体积分数。力学性能的研究结果表明，将冷却速度从2.7℃/s提高到约57.5°C/s，硬度和质量指数分别提高了25%和245%。高冷却速率还将断裂机制从以脆性为主的模式改变为包含大面积凹陷区的高能韧性模式。

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Research Article

Mechanical properties of Al–15Mg₂Si composites prepared under different solidification cooling rates

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Abstract

Abstract

The effect of different cooling rates (2.7, 5.5, 17.1, and 57.5°C/s) on the solidification parameters, microstructure, and mechanical properties of Al−15Mg₂Si composites was studied. The results showed that a high cooling rate refined the Mg₂Si particles and changed their morphology to more compacted forms with less microcracking tendency. The average radius and fraction of primary Mg₂Si particles decreased from 20 µm and 13.5% to about 10 µm and 7.3%, respectively, as the cooling rate increased from 2.7 to 57.5°C/s. Increasing the cooling rate also improved the distribution of microconstituents and decreased the grain size and volume fraction of micropores. The mechanical properties results revealed that augmenting the cooling rate from 2.7 to about 57.5°C/s increased the hardness and quality index by 25% and 245%, respectively. The high cooling rate also changed the fracture mechanism from a brittle-dominated mode to a high-energy ductile mode comprising extensive dimpled zones.
- Al−15Mg₂Si composite;
- solidification cooling rate;
- thermal analysis;
- mechanical properties

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不同凝固冷却速率下制备的Al–15Mg₂Si复合材料的力学性能

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Mechanical properties of Al–15Mg₂Si composites prepared under different solidification cooling rates

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不同凝固冷却速率下制备的Al–15Mg2Si复合材料的力学性能

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Mechanical properties of Al–15Mg2Si composites prepared under different solidification cooling rates

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不同凝固冷却速率下制备的Al–15Mg₂Si复合材料的力学性能

Mechanical properties of Al–15Mg₂Si composites prepared under different solidification cooling rates