Quick Search:       Advanced Search
刘晓燕,张琪,杨西荣,亢淑梅.超细晶工业纯钛的变形、应变速率敏感性和激活体积[J].稀有金属材料与工程(英文),2020,49(6):1867~1872.[LIU Xiaoyan,ZHANG Qi,YANG Xirong and KANG Shumei.Deformation, strain rate sensitivity and activation volume of ultrafine-grained commercially pure Ti[J].Rare Metal Materials and Engineering,2020,49(6):1867~1872.]
Deformation, strain rate sensitivity and activation volume of ultrafine-grained commercially pure Ti
Download Pdf  View/Add Comment  Download reader
Received:January 26, 2019  Revised:April 10, 2019
DOI:
Key words: Ultrafine-grained  commercially pure Ti  strain rate sensitivity  activation volume  flow softening
Foundation item:国家自然科学基金项目面上项目(51474170),陕西省自然科学基金青年项目(2016JQ5026),辽宁省教育厅专项基金(2017LNQN14)
Author NameAffiliation
LIU Xiaoyan,ZHANG Qi,YANG Xirong and KANG Shumei  
Hits: 28
Download times: 0
Abstract:
      The deformation behavior of ultrafine-grained (UFG) commercially pure (CP) Ti was investigated. The strain rate sensitivity and activation volume were calculated from strain rate jump tests performed at a temperature range of 250-450 °C and strain rate of 1×10-4 - 1 s-1. The results show that flow softening effect in steady state of deformation occurs in UFG CP Ti which is controlled by high-angle grain boundaries and dislocation activity during the deformation process. Strain rate sensitivity of UFG CP Ti is relatively low in value and increases with the rise of temperature. The activation volume of UFG CP Ti is also low in value and invariant with temperature. The values of strain rate sensitivity and activation volume indicate that dislocation-dislocation interactions within the grain interiors take place scarcely and interactions between dislocation and grain boundary can significantly affect plastic deformation of UFG CP Ti.