MULTIMODAL NANOSTRUCTURED TITANIUM USING SEVERE PLASTIC DEFORMATION

摘要：

In the present study,multimodal nanostructured titanium was engineered using severe plastic deformation.The multimodal structured titanium exhibits an ultrahigh strength of over 940 MPa and a large failure elongation of 24％.The ultrahigh strength is mainly derived from the nanostructured structures;whilst the exceptional ductility originates from the large fraction of high angle grain boundaries,micro-scale structures,and the nonequilibrium grain boundary configuration.It is worth noting that apart from dislocation slip processes,the formation of deformation twins reduced the effective slip distance and increased the strain hardening capacity via the Hall-Petch mechanism,leading to high ductility of the multimodal structured titanium.

关键词： mechanical properties titanium,multimodal microstructure severe plastic deformation

作者: C.Wen D.K.Yang Y.C.Li P.D.Hodgson

作者单位: Faculty of Engineering and Industrial Sciences,Swinburne University of Technology,Hawthorn,Victoria Deakin University,Geelong,Victoria 3217,Australia

会议类型: 国际会议

会议名称: The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)

会议地点: 上海

会议语种:英文

页码: 623-629

在线出版日期: 2011-05-22（万方平台首次上网日期，不代表论文的发表时间）