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The deformation and work hardening behaviour of a SPD processed Al-5Cu alloy

机译:spD处理al-5Cu合金的变形和加工硬化行为

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摘要

An Al-5wt.%Cu alloy supersaturated with Cu in solid solution was subjected to equal channel angular pressing (ECAP). The microstructuralevolution was systematically investigated by backscattered electron (BSE)imaging, electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). It isrevealedthata bimodal grain structurecomposed of coarse micron-sized grains and submicron-sized grains was developed after fourpassesof ECAP. Tensile testingshowed that a high ultimate tensile strength of ~500MPa, a high elongation to failure of ~28%anda uniform elongation of ~5% wereachieved simultaneously.The deformation behaviourand the grain structure evolution during ECAP, the strengtheningmechanismsof theas-deformed material, and especially, the roleplayed by a high content of Cu have been discussed.
机译:对固溶有铜的过饱和的Al-5wt。%Cu合金进行等通道角挤压(ECAP)。通过背散射电子(BSE)成像,电子背散射衍射(EBSD)和透射电子显微镜(TEM)系统地研究了微结构的演化。经过四次ECAP试验后,形成了由粗微米级晶粒和亚微米级晶粒组成的双峰晶粒结构。拉伸试验表明,同时获得了约500MPa的高极限抗拉强度,约28%的高破坏破坏率和5%的均匀伸长率。讨论了高含量的铜的作用。

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