Literature on ECAP generally deals with room temperature or high-temperature deformation regimes. Very few data on low-temperature SPD processes have been published. This study presents some experimental results on the effect of cryogenic treatment prior to ECAP-B_C on microstructure modification, mechanical response, and corrosion behaviour of an AA6012 Al-Mg-Si-Pb alloy. This type of Pb-bearing AA6000-series alloy, is produced and used for its marked post-extrusion machinability. The mechanical properties were inferred by nanoindentation to measure hardness, H, and local elastic modulus, E_r. These data were presented in form of maps to account for the whole H and E_r evolution with cumulative strain. The experimental results showed significant microstructure differences between the cryogenic treated ECAP condition and the conventional ECAP at room temperature. These differences were also correlated with electron microscopy inspections, XRD. Finally, the cryogenic treatment prior ECAP also affected the alloy corrosion behaviour.

关于ECAP的文献通常涉及室温或高温变形状态。关于低温SPD工艺的数据很少公开。这项研究提出关于深冷处理之前ECAP-B的影响的一些实验结果_Ç上微结构改性，力学响应，和AA6012的Al-Mg-Si系Pb合金的腐蚀行为。生产并使用这种类型的含铅AA6000系列合金，具有明显的挤出后机加工性。通过纳米压痕推断机械性能，以测量硬度H和局部弹性模量E _r。这些数据以地图的形式呈现，以说明整个H和E _r累积应变的演化。实验结果表明，在室温下，低温处理的ECAP条件与常规ECAP之间存在显着的微观结构差异。这些差异也与电子显微镜检查XRD相关。最后，ECAP之前的低温处理也影响了合金的腐蚀行为。