冷轧ECAP温变形的组织分析

等径弯曲通道变形是制备块体超细晶材料最有效的方法之一,通过使材料经过剧烈塑性变形获得超细晶组织。采用两通道夹角Φ=90°,外圆角Ψ=20°的模具,成功实现工业纯钛BC方式ECAP温变形,制得ECAP温变形试样后,对各道次ECAP温变形后的工业纯钛进行下压量为55%的冷轧变形,观察分析变形试样的显微组织。

Analysis on the Organization of ECAP Intermediate Temperature Deformation of Cold Rolling

Ultra-fine-grained material has the excellent performance.Therefore,the preparation and organization of ultra-fine-grained materials is always a hot topic of research.Equal Channel Angular Pressing(ECAP) is one of the most effective ways for the preparation of bulk ultra-fine-grained materials.Ultra-fine-grained structure is obtained through severe plastic deformation of the materials.ECAP at intermediate temperature with rout BC was successfully processed into commercial pure titanium(CP-Ti),using a die with the internal angle Φ of 90° and outer curvature angle Ψ of 20°.At the end of the trial after intermediate temperature ECAP,the samples are deformed by cold rolling,with the cold rolling strain being 55%.Meanwhile,the deformation specimens’ microstructure performance is investigated.