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材料工程  2015 

冷轧对Al10Cu25Co20Fe20Ni25高熵合金组织结构及力学性能的影响

DOI: 10.11868/j.issn.1001-4381.2015.08.009, PP. 50-55

Keywords: 高熵合金,冷轧,相结构,抗拉强度,微观结构

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Abstract:

对铸态Al10Cu25Co20Fe20Ni25高熵合金进行冷轧处理后进行室温拉伸测试,并利用X射线衍射仪(XRD)和扫描电镜(SEM)分别对其相结构、微观组织形貌及拉伸断口进行分析。结果表明经冷轧工艺处理后,Al10Cu25Co20Fe20Ni25高熵合金硬度最大为285HV,较轧制前提高了51.6%;在变形量为40%时,抗拉强度达到最大值,为638MPa,是铸态合金的2.7倍。拉伸断口分析表明,铸态合金的断裂模式为树枝晶沿晶断裂和韧窝型延性断裂,而冷轧态合金主要为韧窝型延性断裂模式。

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