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首页> 外文期刊>Materials Science and Engineering >Microstructures and mechanical properties of in-situ Al_3Ti/2024Al composites after solution and subsequent aging treatment
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Microstructures and mechanical properties of in-situ Al_3Ti/2024Al composites after solution and subsequent aging treatment

机译：固溶及后续时效处理后原位Al_3Ti / 2024Al复合材料的组织和力学性能

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摘要

In the present work, in-situ Al3Ti/2024Al composites with different amount of Al3Ti reinforcements were fabricated by ultrasonic casting method. The effects of solution and subsequent aging treatment on the microstructures and mechanical properties were studied. The results show that solution at 500 °C for 6 h is suitable for in-situ Al3Ti/2024Al composites with mass fractions of reinforcements between 4 wt% and 16 wt%. The aging kinetics of Al3Ti/2024Al composites was promoted by the Al3Ti reinforcements. When the mass fraction of Al3Ti is increased from 0% to 16%, the peak hardness is increased by 20.3%, and the time required to reach the peak hardness is shortened by 66.7%. The microstructures of peak-aged Al3Ti/2024Al composites consist of equiaxed α-Al grains and evenly distributed reinforcing particles. As the mass fraction of Al3Ti increasing, the compression and tensile strengths were both increased gradually at the sacrifice of plasticity.
机译：在目前的工作中，通过超声铸造法制备了具有不同数量的Al3Ti增强材料的原位Al3Ti / 2024Al复合材料。研究了固溶和随后的时效处理对组织和力学性能的影响。结果表明，在500 C下固溶6 h适用于原位Al3Ti / 2024Al复合材料，增强材料的质量分数在4 wt％和16 wt％之间。 Al3Ti增强材料促进了Al3Ti / 2024Al复合材料的时效动力学。当Al 3 Ti的质量分数从0％增加到16％时，峰值硬度增加20.3％，并且达到峰值硬度所需的时间缩短了66.7％。峰时效Al3Ti / 2024Al复合材料的微观结构由等轴α-Al晶粒和均匀分布的增强颗粒组成。随着Al3Ti质量分数的增加，抗压强度和抗拉强度均逐渐增加，而牺牲了可塑性。

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