Load relaxation behavior of ultra-fine grained Ti-6Al-4V alloy
SCIE
SCOPUS
- Title
- Load relaxation behavior of ultra-fine grained Ti-6Al-4V alloy
- Authors
- Ko, YG; Kim, JH; Lee, CS; Shin, DH; Semiatin, SL
- Date Issued
- 2005-01
- Publisher
- TRANS TECH PUBLICATIONS LTD
- Abstract
- In this study, superplastic deformation behavior of ultrafine-grained Ti-6Al-4V alloy was investigated on the basis of the inelastic deformation theory which consists of grain matrix deformation and grain boundary sliding. Specimens with coarse equiaxed grains (11 mu m in diameter) were significantly refined ( approximate to 0.3 mu m in diameter) with high angle boundaries after 4 times of isothermal equal channel angular (ECA) pressing at 600 degrees C. Load relaxation test was performed at 600 similar to 700 degrees C to enlighten the deformation mechanisms operating at specific temperature and to find optimum superplastic forming conditions for ultrafine-grained structures. Main efforts were devoted to analyze quantitatively the relative amount of each deformation mode, i.e., dislocation glide and grain boundary sliding operating at specific temperature.
- Keywords
- Ti-6Al-4V alloy; equal channel angular pressing; inelastic deformation theory; superplastic deformation; CHANNEL ANGULAR EXTRUSION; SUPERPLASTICITY; TEMPERATURE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/24736
- DOI
- 10.4028/www.scientific.net/MSF.475-479.2955
- ISSN
- 0255-5476
- Article Type
- Article
- Citation
- MATERIALS SCIENCE FORUM, vol. 475-479, page. 2955 - 2960, 2005-01
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