Microstructural evolution and strain-hardening behavior of multi-pass caliber-rolled Ti-13Nb-13Zr
SCIE
SCOPUS
- Title
- Microstructural evolution and strain-hardening behavior of multi-pass caliber-rolled Ti-13Nb-13Zr
- Authors
- Lee, T; Park, KT; Lee, DJ; Jeong, J; Oh, SH; Kim, HS; Park, CH; Lee, CS
- Date Issued
- 2015-11-11
- Publisher
- ELSEVIER SCIENCE SA
- Abstract
- The multi-pass caliber-rolling (MPCR) process is a rod-manufacturing process that has recently proven capable of fabricating ultrafine-grained bulk rods with superior mechanical performance for biomedical uses. There have rarely been studies which focused on MPCR-processed nonferrous alloys in spite of the great potential of doing so. The present work elucidates the metallurgical phenomena which occur during the MPCR process of Ti-13Nb-13Zr alloy, such as strain accumulation, microstructural evolution, and strain-hardening behavior. These factors were discussed in light of dislocation storage and annihilation. A FEM analysis revealed a significant amount of plastic strain applied by the MPCR process, most of which was considered as redundant strain. The heavy deformation induced a fragmentation of lamellar structure and strong grain refinement as the rolling passes increased in number. Both dynamic globularization and continuous dynamic recrystallization played key roles in such a microstructural change. In addition, a dislocation-based analysis provided further insight into the microstructural evolution and strain-hardening behavior of MPCR-processed titanium alloys. (C) 2015 Elsevier B.V. All rights reserved.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/37318
- DOI
- 10.1016/J.MSEA.2015.09.062
- ISSN
- 0921-5093
- Article Type
- Article
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol. 648, page. 359 - 366, 2015-11-11
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