Evaluation of Sensitization and Self-Healing in Austenitic Stainless Steels Based on Simulations of Cr-Depleted Zones
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- Tokunaga Tatsuya
- Department of Applied Science for Integrated System Engineering, Kyushu Institute of Technology
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- Ohtani Hiroshi
- Department of Materials Science and Engineering, Kyushu Institute of Technology
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- Ågren John
- Department of Materials Science and Engineering, The Royal Institute of Technology
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説明
A simulation of the grain boundary precipitation of the Cr-rich carbide, M23C6, in austenitic stainless steels has been carried out using the DICTRA software package employing kinetic and thermodynamic databases. Our calculations reproduced the evolution of the Cr-depleted zone close to M23C6 carbide and the disappearance of the zone after a long annealing time. In addition, the calculated time-temperature-sensitization diagrams were in line with the experimental results of typical corrosion trends with annealing time. According to our results, despite the simple treatment used, a reasonable approximation for the simulations was to set the initial width of the austenite region from which the carbon was drawn as a sixth of the grain size. We also confirmed that the onset of sensitization for a steel with 0.1 mass%C shifted to shorter times and to higher temperatures compared with a steel with 0.06 mass%C.
収録刊行物
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- ISIJ International
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ISIJ International 51 (6), 965-968, 2011
一般社団法人 日本鉄鋼協会
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詳細情報 詳細情報について
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- CRID
- 1390282681465209728
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- NII論文ID
- 10030381635
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- NII書誌ID
- AA10680712
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- ISSN
- 13475460
- 09151559
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- 本文言語コード
- en
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- データソース種別
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- JaLC
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- CiNii Articles
- OpenAIRE
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- 使用不可