高密度电脉冲诱导超细晶化的机理与实践

High density electropulsing was applied to a low-carbon steel in the solid state, the ultrafine grained microstructure and nano-structure was found to be formed, the tensile strength of the samples was dramatically enhanced without a decrease in ductility. The influence of electropulsing on nucleation during phase transformation was studied. The mechanism for grain refinement of metallic materials under high density electropulsing was discussed.

以高纯净细晶粒（约5μm）钢为模型材料，建立通过高密度电脉冲处理获得超细晶粒（<1μm）金属材料的新方法。通过调整关键实验参数，分析温度、升温速度、降温速度、内部瞬庇α偷缱臃绲戎匾蛩囟越鹗舨牧铣妇Щ淖饔眉跋嗷ス叵怠＝⒏呙芏鹊缏龀逵盏汲妇Щ睦砺勰Ｐ停教指呙芏鹊缏龀逑富Я５奈⒐刍怼