The effects of C and N on solid solution strengthening and grain refinement strengthening were quantitatively evaluated using various austenitic stainless steels in which C and N were added independently to Fe-18 mass%Cr-12 mass%Ni alloys. As a result of evaluating the amount of solid solution strengthening from the intercept value in the Hall-Petch relationship, it was confirmed that N has a stronger solid solution strengthening capacity than C. On the other hand, the addition of C and N increased the slope of the Hall-Petch relationship, the so-called Hall-Petch coefficient, and the amount of grain refinement strengthening increased. Comparing the effects of C and N, there was no significant difference in the effect of increasing the Hall-Petch coefficient between the two elements at the same amount of addition. The critical grain boundary shear stress measured by nanoindentation tests and the Hall-Petch coefficient corresponded well for both steels, demonstrating that the increase in critical shear stress due to the addition of C and N results in increased grain refinement strengthening. However, the amount of grain boundary segregation was calculated to be considerably higher for C than for N, suggesting that N is more effective than C in increasing the critical grain boundary shear stress.
{"title":"オーステナイト系ステンレス鋼における結晶粒微細化強化の炭素および窒素濃度依存性","authors":"Yoshihiro Oka, Ayumi Morimatsu, Takuro Masumura, Takahito Ohmura, Toshihiro Tsuchiyama","doi":"10.2355/tetsutohagane.tetsu-2023-072","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2023-072","url":null,"abstract":"The effects of C and N on solid solution strengthening and grain refinement strengthening were quantitatively evaluated using various austenitic stainless steels in which C and N were added independently to Fe-18 mass%Cr-12 mass%Ni alloys. As a result of evaluating the amount of solid solution strengthening from the intercept value in the Hall-Petch relationship, it was confirmed that N has a stronger solid solution strengthening capacity than C. On the other hand, the addition of C and N increased the slope of the Hall-Petch relationship, the so-called Hall-Petch coefficient, and the amount of grain refinement strengthening increased. Comparing the effects of C and N, there was no significant difference in the effect of increasing the Hall-Petch coefficient between the two elements at the same amount of addition. The critical grain boundary shear stress measured by nanoindentation tests and the Hall-Petch coefficient corresponded well for both steels, demonstrating that the increase in critical shear stress due to the addition of C and N results in increased grain refinement strengthening. However, the amount of grain boundary segregation was calculated to be considerably higher for C than for N, suggesting that N is more effective than C in increasing the critical grain boundary shear stress.","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135158820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.2355/tetsutohagane.tetsu-2023-012
Koharu Nishio, R. Matsumoto, H. Utsunomiya, Kosuke Hayashi, Yasuyoshi Hidaka, Masaaki Sugiyama
{"title":"熱間圧延中の低炭素鋼板の酸化皮膜の変形に及ぼすマンガンの影響","authors":"Koharu Nishio, R. Matsumoto, H. Utsunomiya, Kosuke Hayashi, Yasuyoshi Hidaka, Masaaki Sugiyama","doi":"10.2355/tetsutohagane.tetsu-2023-012","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2023-012","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"50 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75810869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.2355/tetsutohagane.109.149
M. Mitsuhara, H. Nakashima
{"title":"Preface to the Special Issue “Fundamental Researches and its Applications for Strengthening in High Temperature Materials”","authors":"M. Mitsuhara, H. Nakashima","doi":"10.2355/tetsutohagane.109.149","DOIUrl":"https://doi.org/10.2355/tetsutohagane.109.149","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"92 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79771767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.2355/tetsutohagane.tetsu-2022-124
Takayuki Yonezawa, Takashige Mori, S. Tsutsumi
{"title":"Effects of Cyclic Softening on Fatigue Crack Propagation Properties of Steel","authors":"Takayuki Yonezawa, Takashige Mori, S. Tsutsumi","doi":"10.2355/tetsutohagane.tetsu-2022-124","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2022-124","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"72 3 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77177366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.2355/tetsutohagane.tetsu-2022-121
Kota Moriya, Koichi Takahashi, Akinori Murao, Takeshi Sato, K. Fukada
{"title":"高炉羽口におけるラジカル化学発光測定を活用した微粉炭燃焼率推定手法の開発","authors":"Kota Moriya, Koichi Takahashi, Akinori Murao, Takeshi Sato, K. Fukada","doi":"10.2355/tetsutohagane.tetsu-2022-121","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2022-121","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"229 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74470104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.2355/tetsutohagane.tetsu-2022-129
Yo Hyodo, Masao Yuga, Yasuyuki Kurihara, T. Doan, T. Sakimoto, Y. Murakami, K. Goto, T. Tagawa
{"title":"Improvement of Fatigue Crack Propagation Property in Low Carbon Steel by Microstructural Control and an Investigation of its Practical Benefit","authors":"Yo Hyodo, Masao Yuga, Yasuyuki Kurihara, T. Doan, T. Sakimoto, Y. Murakami, K. Goto, T. Tagawa","doi":"10.2355/tetsutohagane.tetsu-2022-129","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2022-129","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"38 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90132741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.2355/tetsutohagane.tetsu-2022-061
Takayuki Iwama, R. Inoue, Kenji Nakase, S. Ueda,
{"title":"Separation of Phosphorus from Phosphorus-concentrated Steelmaking Slag","authors":"Takayuki Iwama, R. Inoue, Kenji Nakase, S. Ueda,","doi":"10.2355/tetsutohagane.tetsu-2022-061","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2022-061","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"33 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91267455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.2355/tetsutohagane.tetsu-2023-092
Ai Goto, Masato Yuya, Kaori Kawano
The effect of boron addition on low cycle bending fatigue strength of carburized steel was investigated. The low-cycle bending fatigue strength of B-added steel was improved compared to SCM420. When the fatigue failure was divided into the crack initiation process and the crack propagation process, the addition of boron did not affect the crack initiation life, but improved the crack propagation life. The presence of boron in B-added steels was evaluated using TOF-SIMS and AES measurements. Grain boundary segregation of boron was not observed in the gas carburized surface layer, but precipitation of BN was observed. On the other hand, grain boundary segregation of boron was observed from the carburized surface layer toward the 400 μm core side. Therefore, it is considered that the grain boundary strengthening effect of boron was not obtained in the carburized surface layer, and the crack initiation life did not change.
{"title":"Effects of Boron Addition on Low Cycle Bending Fatigue Strength of Gas Carburized Low Alloy Steel","authors":"Ai Goto, Masato Yuya, Kaori Kawano","doi":"10.2355/tetsutohagane.tetsu-2023-092","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2023-092","url":null,"abstract":"The effect of boron addition on low cycle bending fatigue strength of carburized steel was investigated. The low-cycle bending fatigue strength of B-added steel was improved compared to SCM420. When the fatigue failure was divided into the crack initiation process and the crack propagation process, the addition of boron did not affect the crack initiation life, but improved the crack propagation life. The presence of boron in B-added steels was evaluated using TOF-SIMS and AES measurements. Grain boundary segregation of boron was not observed in the gas carburized surface layer, but precipitation of BN was observed. On the other hand, grain boundary segregation of boron was observed from the carburized surface layer toward the 400 μm core side. Therefore, it is considered that the grain boundary strengthening effect of boron was not obtained in the carburized surface layer, and the crack initiation life did not change.","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135508163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.2355/tetsutohagane.tetsu-2022-132
Masahiro Shimura, Daisuke Kasai, Takayuki Otsuka
{"title":"高張力鋼の冷間圧延におけるスリップ発生機構の解明","authors":"Masahiro Shimura, Daisuke Kasai, Takayuki Otsuka","doi":"10.2355/tetsutohagane.tetsu-2022-132","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2022-132","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"131 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85643351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.2355/tetsutohagane.tetsu-2022-067
K. Ishikawa, M. Fujioka, M. Hoshino, J. Takahashi, Ryuichi Homma, K. Ushioda
{"title":"Effect of Molybdenum Contents on Hardenability and Precipitation Behaviors in B-added Steels Austenitized at High Temperature","authors":"K. Ishikawa, M. Fujioka, M. Hoshino, J. Takahashi, Ryuichi Homma, K. Ushioda","doi":"10.2355/tetsutohagane.tetsu-2022-067","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2022-067","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"30 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87843855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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