2015年2月
The difference in thermal and mechanical stabilities of austenite between carbon- and nitrogen-added metastable austenitic stainless steels
ACTA MATERIALIA
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- 巻
- 84
- 号
- 開始ページ
- 330
- 終了ページ
- 338
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.actamat.2014.10.041
- 出版者・発行元
- PERGAMON-ELSEVIER SCIENCE LTD
In order to evaluate the effects of carbon and nitrogen addition on the stability of austenite, athermal and deformation-induced alpha'-martensitic transformation behaviors were investigated using type 304-metastable austenitic stainless steels containing 0.1 mass% carbon or nitrogen. The difference in the development of the deformation microstructure in particular is discussed in terms of the stacking-fault energy (SFE). Since carbon-added steel has a lower SFE than that of nitrogen-added steel, deformation twins and epsilon-martensite were preferentially formed in the carbon-added steel, whereas a dislocation cell structure developed in the nitrogen-added steel. Crystallographic analysis using the electron backscatter diffraction method revealed that the difference in the deformation microstructure has a significant influence on the growth behavior of deformation-induced alpha'-martensite, that is, the interface of the deformation twins and epsilon-martensite suppresses the growth of alpha'-martensite, whereas dislocation cell boundaries are not effective. As a result, the mechanical stability of carbon-added steel is slightly higher than that of nitrogen-added steel, although the thermal stabilization effect of carbon is much lower than that of nitrogen. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.actamat.2014.10.041
- ISSN : 1359-6454
- eISSN : 1873-2453
- Web of Science ID : WOS:000348688300030