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. By using severe plastic deformation(SPD) techniques, materials with fine grain size as small as 200-250nm have been obtained. However, the nature of the grain boundaries has not been theoretically... limit of the cell size of SPD materials. Key words: evolution of dislocation cells; ultrafine grain; severe plastic deformation CLC number: TG1 Document code: A 1 INTRODUCTION It is expected......
Trans. Nonferrous Met. Soc. China 22(2012) 1810-1816 Deformation defects and electron irradiation effect in nanostructured Al-Mg alloy processed by severe plastic deformation LIU Man-ping1,2, SUN... subjected to severe plastic deformation, a more thorough examination of the radiation effect on the formation of the planar defects in the high pressure torsion (HPT) alloys was conducted using high......
Inner Oxide Fabrication and Severe Plastic Deformation Microstructure Homogenization of Silver Cerium Oxide Composites周晓龙,陈敬超,曹建春,杜焰,张昆华,孙加林摘 要:Fabrication... in inner silver cerium alloy. This no-homogenization microstructure can not be dispersed by general extrusion technology. Severe plastic deformation was adopted to disperse the CeO2 particles......
大塑性变形(severe plastic deformation,SPD)的研究现状史庆南,王效琪,起华荣,王军丽,周蕾,刘兆华昆明理工大学材料科学与工程学院摘 要:本文概述了近10年来大塑性变形(severe plastic deformation,SPD)研究成果,文章首先简述了各种SPD工艺的特点,其次对SPD强化机理研究现状做了分析,最后基于目前SPD技术的应用现状,对其发展和应用前景展开了必要的讨论和展望.关键词:大塑性变形(SPD);综述;晶粒细化机制;强化机制;第二相;......
of severe plastic deformation induced by the high-speed high-pressure torsion(HSHPT) process on the microstructural evolution of an Fe–Mn–Si–Cr alloy was investigated. Transmission electron microscopic analysis of the alloy revealed the existence of nanoscale grains with an abundance of stacking faults. The high density of dislocations characteristic of severe plastic deformation was not observed......
Granular Carbides-Assisted Ultrafine-Ferrite Fabrication in the Pearlitic Steel Without Severe Plastic Deformation and AnnealingHan Zheng1,Liming Fu1,Xinbo Ji1,Ziyong Li1,Yanle Sun1,Sixin... equivalent strain cold rolling without severe plastic deformation(SPD) and annealing. The average grain size of ferrite depends on the volume fraction, shape and distribution of granular carbides......
Phase transformation behaviors and mechanical properties of Ti50Ni49Fe1 alloy with severe plastic deformationWen Ma1,2,Bin Chen2,Fu-Shun Liu2,Qing Xu31. Division of Science and Technology Information... Aerospace Machinery Company摘 要:In this work,transformation behaviors and mechanical properties of cold-rolled shape memory alloy Ti50Ni49Fe1by severe plastic......
Mechanism of localized severe plastic deformation and damage fracture in fine-blanking using mixed displacement and pressure FEM XIE Xiao-long(谢晓龙)1, ZHAO Zhen(赵 震)1, YU Song(虞 松)1, GU Sheng... Engineering Co Ltd, Suzhou 215004, China Received 4 November 2005; accepted 12 April 2006 Abstract: A mixed displacement-pressure updated Lagrange FEM was used to simulate the severe plastic deformation......
Determination of mechanical properties of pure zirconium processed by surface severe plastic deformation through nanoindentationYao-Mian Wang,Wei Zhuang,Huan-Ping Yang,Cong-Hui ZhangSchool... below the treated surface to verify the derivation of the local elastic-plastic constitutive relationship.Stressstrain curves were computed for the treated samples through the rule of mixtures......
Consolidation of AA 7075-2 wt% ZrO2 Composite Powders by Severe Plastic Deformation via ECAPS.E.Hernández-Marínez1,J.J.Cruz-Rivera1,J.A.Mu?oz-Bola?os3,J.M.Cabrera3,4,J.L.Hernández-Rivera51. Instituto de Metalurgia, Universidad Autónoma de San Luis Potosí3. Departamento de Ciencia de Materiales e Ingeniería Metalúrgica, Universitat Politècnica de Catalunya5. CONACYT Research Fellow-Instituto de......