大塑性变形材料及变形机制研究进展

大塑性变形技术（SPD）具有将铸态粗晶金属的晶粒细化到纳米量级的巨大潜力。综述了SPD技术的分类、优势及其存在问题；介绍了材料在SPD加工过程中的组织转变特点，指出如果超塑性成形能够在镁合金等中得到成功的应用，则可大大拓宽其实际应用领域；描述了SPD细化铝、镁、钛等合金后的微观组织、塑性变形机制与力学性能，最后对大塑性变形技术的应用前景进行了展望。

Deformation Mechanism of Severe Plastic Deformation Alloy

Severe plastic deformation（SPD） is an effective route to refining coarse-grain size into nanometer regime, the SPD technical classification, advantage and it existence problem are reviewed. The characteristics of the organization of material which change within processing in the SPD is introduced, also points out superplasticity can get a successful application in the magnesium alloy etc.,which may greatly open up its practical application domain; then describes the organization, the plastic deformation mechanism and mechanics properties of AI, Mg, Ti alloy after SPD, finally further improvements and applications of SPD material are put forward.