Effect of N on Microstructure and Tensile Behavior of TWIP steel
SCIE
SCOPUS
- Title
- Effect of N on Microstructure and Tensile Behavior of TWIP steel
- Authors
- Sangwon Lee; Jinkyung Kim; Kim, S; Chin, K; De Cooman, BC
- Date Issued
- 2010-06
- Publisher
- Trans Tech Publications
- Abstract
- The present study focused on the design and testing of new 3rd generation TWIP steels to find reduced Mn content alternatives to the existing high Mn FeMnC and FeMnAlC alloy systems. In order to investigate the effect of nitrogen addition, 12Mn0.6C-N was examined and 18Mn0.6C-N steel was used as a reference. Effects of nitrogen and manganese on the microstructure and mechanical properties were investigated by X-ray diffraction, optical microscopy, scanning electron microscopy and tensile testing. The deformation microstructures of 12Mn0.6C-N were mixtures of twinned austenite and 5 similar to 10% epsilon-martensite. Only deformation twinning was observed in 1 8Mn0.6C-N during the deformation due to its higher stacking fault energy. 1 8Mn0.6C-N steel exhibited higher strength and elongation than 12Mn0.6C-N steel. The effect of the strain rate on the tensile behavior of both materials was also examined. While 18Mn0.6C-N showed clear negative strain rate sensitivity, 12Mn0.6C-N did not show a clear relationship between flow stress and strain rate. The effect of annealing temperature on the tensile behavior and microstructure was also examined.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/35259
- DOI
- 10.4028/www.scientific.net/MSF.654-656.262
- ISSN
- 0255-5476
- Article Type
- Article
- Citation
- MATERIALS SCIENCE FORUM, vol. 654, page. 262 - 265, 2010-06
- 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.