首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Cold Deformation and Heat Treatment on the Microstructure and Mechanical Behavior of High Entropy Alloy CuCrFeNi2Al0.5
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Effect of Cold Deformation and Heat Treatment on the Microstructure and Mechanical Behavior of High Entropy Alloy CuCrFeNi2Al0.5

机译:冷变形和热处理对高熵合金Cucrfeni2Al0.5的微观结构和力学行为的影响

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摘要

CuCrFeNi2Al0.5, a high entropy alloy (HEA) with a single FCC phase, was deformed at room temperature and then heat treated. The small particles precipitated from the deformed FCC solid solution matrix after heating at 700 degrees C, softening the solid solution matrix. This outcome confirms that the microstructure of HEAs can be controlled by heat treatment in addition to controlling the chemical composition and the rate of cooling from liquid alloys. The hardness of the samples increased due to precipitation hardening, and the specimen heated at 700 degrees C with 10% predeformation had the highest hardness. As the predeformation increases, the precipitates tend to interweave in the network morphology. Meanwhile, grains in all specimens became more severely coarse after heat treatment at 1100 degrees C. Predeformation followed by annealing can obviously slow down the creep rate, indicating that annealing at an appropriate temperature can improve the mechanical properties of deformed HEA.
机译:Cucrfeni2Al0.5,具有单个FCC阶段的高熵合金(Hea),在室温下变形,然后热处理。在700℃下加热后,从变形的FCC固溶体基质中沉淀的小颗粒,软化固溶体基质。该结果证实,除了控制化学成分和来自液体合金的冷却速率之外,还可以通过热处理来控制HEA的微观结构。样品的硬度由于沉淀硬化而增加,并且在700摄氏度下加热的样品具有10%的预换剂具有最高的硬度。随着预流量的增加,沉淀物倾向于在网络形态中进行交织。同时,在1100摄氏度下热处理后,所有标本中的谷物变得更严重的粗糙。预测随后通过退火可以显然减慢蠕变率,表明在适当温度下退火可以改善变形HEA的机械性能。

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