超细晶材料制备新工艺——挤扭

Recently, interest in the preparetion of bulk ultrafine-grained materials has grown significantly in material field. As a new kind of severe plastic deformation methods for preparing bulk ultrafine-grained materials, twist extrusion (TE) plays an important role in fining the microstructure of material, improving mechanical properties and formability of material. In this review, attention is concentrated on the basic principles and deformation characteristics of TE, the present status and advances made in research at home and abroad. Finally, both problems urgent to be solved and application of TE in the future are mentioned.