Effect of Deformation Route on the Mechanical Properties of CP-Ti Deformed by Equal Channel Angular Pressing (ECAP)
Effect of Deformation Route on the Mechanical Properties of CP-Ti Deformed by Equal Channel Angular Pressing (ECAP)
复制标题
DOI：
10.4028/www.scientific.net/kem.345-346.125
复制
发表时间：
2007-08
期刊：
影响因子：
--
通讯作者：
S. Chon;S.M. Liu;T. Kim;Joongkeun Park
中科院分区：
文献类型：
--
作者：
S. Chon;S.M. Liu;T. Kim;Joongkeun Park
采用拉伸试验、TEM观察、x射线极形测量和ODF计算等方法，研究了变形路径对一级CP-Ti等通道角压变形力学性能的影响。Bc路线由于晶粒细，晶界角大，屈服应力高，延伸率均匀较大，因此具有较高的极限抗拉强度。造成这种情况的原因是，除了常见的基底滑移外，Bc路线还发生了棱柱滑移。由于织构硬化的显著贡献，尽管C路线的晶粒组织不利，但却表现出惊人的高屈服应力。
The effect of deformation route on the mechanical properties of grade-1 CP-Ti deformed by equal-channel angular pressing (ECAP) was studied using tensile testing, TEM observation, Xray pole figure measurement, and ODF calculation. Route Bc showed high yield stress and comparatively large uniform elongation, thus high ultimate tensile strength, because of its fine grain structure with high angle grain boundary. The reason for this was because of the occurrence of prismatic slip in route Bc, in addition to the commonly occurring basal slip. Route C showed surprisingly high yield stress despite of its unfavorable grain structure because of the significant contribution of texture hardening.