Diffusion Controlled Transformation Plasticity of Steel under Externally Applied Stress
SCIE
SCOPUS
- Title
- Diffusion Controlled Transformation Plasticity of Steel under Externally Applied Stress
- Authors
- HeungNam Han; Jae Kon Lee; Suh, DW; Sung-Joon Kim
- Date Issued
- 2007-01-01
- Publisher
- Taylor and Francis
- Abstract
- The transformation plasticity of steel during phase transformation under external stress was modelled on a migrating interface diffusion mechanism. Atomic diffusion along the migrating phase interface is assumed to cause transformation plasticity by an accelerated Coble creep. A creep equation on transformation plasticity is derived as a function of transformation rate, temperature and externally applied stress. Predictions are compared with dilatometric measurements during the austenite-to-ferrite and ferrite-to-austenite transformation of steel under various levels of uniaxial compressive stress. Good agreement was found between the calculated and experimental transformation strain. The model proposed also successfully describes the thermally activated behaviour of the transformation strain. The evaluated effective diffusion coefficients on the migrating interface are three to four orders of magnitude larger than those reported for stationary boundaries.
- Keywords
- GRAIN-BOUNDARY MIGRATION; BAINITE TRANSFORMATION; PHASE-TRANSFORMATION; CONSTITUTIVE MODEL; SUPERPLASTICITY; DEFORMATION; RECRYSTALLIZATION; BEHAVIOR; KINETICS; STRAIN
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/25682
- DOI
- 10.1080/14786430600953731
- ISSN
- 1478-6435
- Article Type
- Article
- Citation
- PHILOSOPHICAL MAGAZINE, vol. 87, no. 1, page. 159 - 176, 2007-01-01
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.