所属单位：冶金工程学院

发表刊物：Materials Science Forum

关键字：中文关键字：1，英文关键字：Ultrafine-grained CP-Ti, Equal-channel Angular Pre

摘要：Ultrafine-grained (UFG) commercially pure (CP) Ti with a grain size of about 200 nm was produced by ECAP up to 8 passes using route BC at room temperature. For ECAP processing a proper die set was designed and constructed with an internal channel angle Φ of 120° and an outer arc of curvature Ψ of 20°. Strain rate sensitivity of UFG CP-Ti and CG CP-Ti were investigated by compression tests in the temperature range of 298~673K and strain rate range of 10-4~100s-1 using Gleeble simulator machine. Evolution of the microstructure during compression testing was observed using optical microscopy (OM) and transmission electron microscopy (TEM). Strain rate sensitivity value m of the UFG CP-Ti has been measured and is found to increase with increasing temperature and decreasing strain rate, and is enhanced compared to that of CG CP-Ti. Result of the deformation activation energy determination of UFG CP-Ti indicates that the deformation mechanism in UFG CP-Ti is correlated to the grain boundaries.

备注：刘晓燕

合写作者：XichengZhao,XirongYang

第一作者：刘晓燕

论文类型：期刊论文

卷号：卷：667-669

期号：期：

页面范围：页：707-7112

是否译文：否

发表时间：2011-03-01