Recent developments of the high strength and high ductility nanostructured materials

作     者：Jian LU,Aiying CHEN,Hongning KOU,Ying LI,Leyu WANG and Chunsheng WEN Department of Mechanical Engineering,The Hong Kong Polytechnic University,Hung Hom Kowloon,Hong Kong,China 

出 版 物：《Baosteel Technical Research》 (宝钢技术研究（英文版）)

年 卷 期：2010年第4卷第S1期

页      面：93-页

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

主　　题：nanostructured materials high strength high ductility surface mechanical attrition treatment(SMAT) 

摘      要：This talk will summarize the recent work related to a kind of new nanomaterials produced by the SMAT (surface mechanical attrition treatment).The concept of surface nanocrystallization of materials will be *** terms of the grain refinement mechanism induced by plastic deformation,a novel surface mechanical attrition(SMA) technique was developed for synthesizing a nanostructured surface layer on metallic materials in order to upgrade the overall properties and *** grain refinement mechanism of the surface layer during the SMA treatment will be analyzed in terms of the nanostructure observations in several typical *** high yield stress(5 times of the base material) on the surface layer of the material obtained by the SMAT has been *** effect of surface nanostructures on the mechanical behavior and on the failure mechanism of metallic material shows the possibility to develop a new strength gradient composite using co-rolling and *** role of residual stress induced during the treatment will be investigated and *** developed materials are also porosity free materials which can be used as reference material for the local mechanical behavior investigation technique such as the nanoindentation.A general concept for obtaining high strength and high ductility nanostructured materials will be *** exceptional high strength and high ductility steels have *** simulation of the mechanisms for improving ductility of high strength nanostructured materials will be *** potential applications for the land transportation vehicles(car,bus,train) and wind energy have been *** examples of concept design for the integration of the advanced nanostructured steels will be presented.