Nanoindentation Study on Mechanical Properties of Commercially Pure Ti Processed by ECAP

作者：Liu Xiaoyan^*; Zhao Xicheng; Yang Xirong; Jia Jiangping

来源：Rare Metal Materials and Engineering, 2017, 46(3): 669-674.

• ECAP
• commercially pure Ti
• nanoindentation
• continuous stiffness measurement
• mechanical properties

Ultrafine grained commercially pure Ti with different grain sizes was prepared by Equal Channel Angular Pressing (ECAP). The mechanical properties of the commercially pure Ti were investigated by a nanoindentation technique. The effects of loading strain rate and grain size on the nanoindentation measurement of commercially pure Ti were discussed. Strain hardening capacity and residual stress of commercially pure Ti were analyzed. The results indicate that the hardness of commercially pure Ti increases with the loading strain rate increasing and the grain size decreasing. The hardness-dislocation curves exhibit the Indentation Size Effect (ISE) with the incorporated hardening effect. The indentation morphology shows that commercially pure Ti processed by ECAP has low strain hardening capacity and compressive residual stress compared to the coarse-grained sample.

• 出版日期2017-3
• 单位西安建筑科技大学