Comparison of Microstructure and Hardness between High-carbon and High-nitrogen Martensites
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- Tsuchiyama Toshihiro
- Department of Materials Science and Engineering, Kyushu University International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University
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- Inoue Kurato
- Graduate Student, Kyushu University
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- Hyodo Katsutoshi
- Graduate Student, Kyushu University
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- Akama Daichi
- Department of Materials Science and Engineering, Kyushu University
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- Nakada Nobuo
- Department of Materials Science and Engineering, Tokyo Institute of Technology
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- Takaki Setsuo
- Research Center for Steel, Kyushu University
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- Koyano Tamotsu
- Cryogenics Division, Research Facility Center, University of Tsukuba
抄録
<p>The microstructure and hardness of martensite in Fe–C and Fe–N alloys with up to 7.5 at% contents of carbon and nitrogen, respectively, were compared. Their difference in hardness was discussed based on four strengthening mechanisms. The martensitic structures of Fe–C and Fe–N alloys with equal contents of carbon and nitrogen, respectively, were nearly identical, except for the amount of retained austenite. Furthermore, Fe–C alloy was considerably harder than Fe–N alloy. This discrepancy gradually increased with carbon and nitrogen contents. The enhanced hardness of Fe–C alloy martensite was attributed to its higher dislocation density and the stronger pinning force of interstitial carbon atoms on dislocations.</p>
収録刊行物
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- ISIJ International
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ISIJ International 59 (1), 161-168, 2019-01-15
一般社団法人 日本鉄鋼協会
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キーワード
詳細情報 詳細情報について
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- CRID
- 1390845713042788224
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- NII論文ID
- 130007580274
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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
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可