热处理对AlFeCrCoNiMo高熵合金微观组织与硬度的影响

发布时间：2018-03-04 02:13

  本文选题：高熵合金　切入点：退火　出处：《锻压技术》2017年07期 　论文类型：期刊论文

【摘要】：利用真空电弧熔炼法制备了AlFeCrCoNiMo高熵合金。用X射线衍射(XRD)、扫描电镜(SEM)、硬度仪,研究了退火对高熵合金的微观组织及硬度的影响。结果表明:铸态以及退火后的合金是树枝晶结构,枝晶间是由Cr_9Mo_(21)Ni_(20)和NiCoCr金属间化合物组成的共晶结构;随着退火温度的升高,FCC相逐渐减少,并会析出新的金属间化合物;合金的微观应力表现出先增大后减少的变化趋势;合金的硬度随着退火温度的升高先升高再降低,合金的应力与硬度的变化趋势一致,当退火温度达到800℃时,合金的硬度达到最大。
[Abstract]:The high entropy AlFeCrCoNiMo alloy was prepared by vacuum arc melting. The effect of annealing on the microstructure and hardness of high entropy alloy is studied. The results show that the as-cast and annealed alloys are dendritic, and the dendritic interdendrites are eutectic structures composed of Cr9MoS-1 / NiS20) and NiCoCr intermetallic compounds. With the increase of annealing temperature, the FCC phase decreases gradually, and new intermetallic compounds are precipitated. The microstructure stress of the alloy increases first and then decreases, and the hardness of the alloy increases first and then decreases with the increase of annealing temperature. The stress of the alloy is consistent with the change of hardness. When the annealing temperature reaches 800 鈩，

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