Pub Date : 2023-07-01DOI: 10.2355/tetsutohagane.tetsu-2023-007
K. Nakayama
{"title":"バナジウム内標準の同時測定に基づく連続光源フレーム原子吸光分析を用いた工具鋼中タングステンの定量","authors":"K. Nakayama","doi":"10.2355/tetsutohagane.tetsu-2023-007","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2023-007","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"14 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82036997","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}
{"title":"316FRステンレス鋼溶接継手の16Cr-8Ni-2MoおよびMod. 316溶接金属のクリープ変形","authors":"Tetsuya Matsunaga, Hiromichi Hongo, Masayo Yamazaki, Masaaki Tabuchi","doi":"10.2355/tetsutohagane.tetsu-2022-128","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2022-128","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"33 4 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77270522","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 : 2023-07-01DOI: 10.2355/tetsutohagane.tetsu-2023-003
Daiki Nakanishi, Tetsuya Uchiyama, H. Shirahata, Manabu Takahashi
{"title":"Suppression of Coarsening of Upper Bainite at prior Austenite Grain Boundaries by Intra-granular Bainite Nucleated on Inclusions in Steel Welds","authors":"Daiki Nakanishi, Tetsuya Uchiyama, H. Shirahata, Manabu Takahashi","doi":"10.2355/tetsutohagane.tetsu-2023-003","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2023-003","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"25 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84190873","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 : 2023-07-01DOI: 10.2355/tetsutohagane.tetsu-2022-120
Toshiya Kinami
{"title":"焼戻しマルテンサイト鋼の水素トラップに及ぼすVおよびMo複合添加の影響","authors":"Toshiya Kinami","doi":"10.2355/tetsutohagane.tetsu-2022-120","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2022-120","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"155 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86790279","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 : 2023-07-01DOI: 10.2355/tetsutohagane.tetsu-2023-002
Shohei Uranaka, Issei Hirashima, Takuya Maeda, T. Masumura, T. Tsuchiyama, Yuzo Kawamoto, H. Shirahata, R. Uemori
{"title":"マルテンサイト鋼における炭素による固溶硬化の定量解析","authors":"Shohei Uranaka, Issei Hirashima, Takuya Maeda, T. Masumura, T. Tsuchiyama, Yuzo Kawamoto, H. Shirahata, R. Uemori","doi":"10.2355/tetsutohagane.tetsu-2023-002","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2023-002","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"42 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86776186","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 : 2023-07-01DOI: 10.2355/tetsutohagane.tetsu-2022-114
Zhenyu Ma, D. Maruoka, T. Murakami, E. Kasai, T. Higuchi
{"title":"Effect of CaO Component on Strength of Pre-granulated Pellets in Composite Sinter Products","authors":"Zhenyu Ma, D. Maruoka, T. Murakami, E. Kasai, T. Higuchi","doi":"10.2355/tetsutohagane.tetsu-2022-114","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2022-114","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"47 14 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77948420","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 : 2023-07-01DOI: 10.2355/tetsutohagane.tetsu-2023-008
Daisuke Itabashi, Kazumi Mizukami
{"title":"フローインジェクション－非対称流れ流動場分離(AF4)法によるナノ粒子個数濃度の定量分析","authors":"Daisuke Itabashi, Kazumi Mizukami","doi":"10.2355/tetsutohagane.tetsu-2023-008","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2023-008","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"15 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75507477","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 : 2023-06-15DOI: 10.2355/tetsutohagane.tetsu-2022-053
Satoshi Mitomi, H. Iwaoka, S. Hirosawa
{"title":"Hydrogen Embrittlement Mechanism of Ultrafine-grained Iron with Different Grain Sizes","authors":"Satoshi Mitomi, H. Iwaoka, S. Hirosawa","doi":"10.2355/tetsutohagane.tetsu-2022-053","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2022-053","url":null,"abstract":"","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"72 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86574744","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 : 2023-06-15DOI: 10.2355/tetsutohagane.tetsu-2021-053
F. Ichikawa, M. Sawada, Yusuke Kohigashi
NoDerivatives license (https://creativecommons.org/licenses/by-nc-nd/4.0/). Abstract: Dislocations are often introduced in Ni-based superalloys to impart sufficient strength at both room temperature and high temperatures prior to their use in automobile exhaust gaskets. However, the interaction between the representative γ′ (Ni3(Al, Ti))-phase precipitates and dislocations in high temperature remains unclear. Therefore, this study examined the effect of cold rolling on age-hardening behavior and microstructure evolution, focusing on the formation of γ′-phase Ni3Ti during aging at 700oC for up to 400 h after 60% cold rolling of solution-treated specimens. During the early stage of aging, at 0.03 h, the hardness rapidly increased from 401 HV to 496 HV. Age-hardening continued until 3 h and reached its peak of 536 HV, followed by gradual decrease with aging time. 3D atom probe investigation revealed that the γ′-phase was confirmed after 0.3 h of aging. However, the composition-modulated structure speculated to be caused by spinodal decomposition was observed in the 0.03 h aged specimen. The change in strength with aging time was considered by calculating the contribution of each strengthening mechanism. In the initial stage of aging (0-3 h), dislocation and solid-solution strengthening dominated along with spinodal strengthening. Strengthening by spinodal decomposition in the 0.03 h aged specimen is presumptively accelerated by the introduced dislocations, which is followed by further precipitation strengthening caused by γ′-phase precipitates. In the later stage of aging (3-400 h), precipitation strengthening became dominant and reached its peak at 20 h aging, while dislocation strengthening decreased with aging time.
{"title":"Age-hardening Behavior in γ′-phase Precipitation-hardening Ni-based Superalloy","authors":"F. Ichikawa, M. Sawada, Yusuke Kohigashi","doi":"10.2355/tetsutohagane.tetsu-2021-053","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2021-053","url":null,"abstract":"NoDerivatives license (https://creativecommons.org/licenses/by-nc-nd/4.0/). Abstract: Dislocations are often introduced in Ni-based superalloys to impart sufficient strength at both room temperature and high temperatures prior to their use in automobile exhaust gaskets. However, the interaction between the representative γ′ (Ni3(Al, Ti))-phase precipitates and dislocations in high temperature remains unclear. Therefore, this study examined the effect of cold rolling on age-hardening behavior and microstructure evolution, focusing on the formation of γ′-phase Ni3Ti during aging at 700oC for up to 400 h after 60% cold rolling of solution-treated specimens. During the early stage of aging, at 0.03 h, the hardness rapidly increased from 401 HV to 496 HV. Age-hardening continued until 3 h and reached its peak of 536 HV, followed by gradual decrease with aging time. 3D atom probe investigation revealed that the γ′-phase was confirmed after 0.3 h of aging. However, the composition-modulated structure speculated to be caused by spinodal decomposition was observed in the 0.03 h aged specimen. The change in strength with aging time was considered by calculating the contribution of each strengthening mechanism. In the initial stage of aging (0-3 h), dislocation and solid-solution strengthening dominated along with spinodal strengthening. Strengthening by spinodal decomposition in the 0.03 h aged specimen is presumptively accelerated by the introduced dislocations, which is followed by further precipitation strengthening caused by γ′-phase precipitates. In the later stage of aging (3-400 h), precipitation strengthening became dominant and reached its peak at 20 h aging, while dislocation strengthening decreased with aging time.","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"58 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74804132","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 : 2023-06-15DOI: 10.2355/tetsutohagane.tetsu-2021-076
Nobuyuki Yoshimura, K. Ushioda, H. Shirahata, M. Hoshino, G. Shigesato, Masaki Tanaka
: To develop microstructure control concepts for ensuring the toughness of high-strength steel plates, ba-sic research was conducted using ferrite single-phase steels with different amounts of C, and the effects of the states of C were investigated along with those of solute N. In this study, Fe-0.017C (mass%) alloy, wherein the state of C was changed to a solid solution, intragranular cementite, and intergranular cementite, were used for microstructural observation, Charpy testing, and fracture surface investigation. The results reveal that the toughness of the intragranular cementite steel was the best, followed by that of solute C steel and intergranular cementite steel. In intergranular cementite steel with significantly in-ferior toughness, the coarse intergranular cementite leads to dislocation pile-up, initial crack formation, and macroscopic brittle fracture. The brittle fracture of intragranular cementite steel was caused by the deformation twins. It is thought that the fine intragranular cementite only had a minor effect on the crack initiation and dislocation mobility. Twin was also confirmed at the initiation point of brittle fracture in the solute C steel. Hence, it was deduced that the deterioration of toughness caused by solute C resulted from the promotion of twinning, which replaced the dislocation movements. However, the deterioration of toughness caused by solute C was smaller compared with that caused by solute N, which partly caused intergranular fracture. This is attributed to the suppression of intergranular fracture by the presence of a small amount of solute C.
{"title":"Effects of States of Carbon and Solute Nitrogen on Toughness of Ferritic Steel","authors":"Nobuyuki Yoshimura, K. Ushioda, H. Shirahata, M. Hoshino, G. Shigesato, Masaki Tanaka","doi":"10.2355/tetsutohagane.tetsu-2021-076","DOIUrl":"https://doi.org/10.2355/tetsutohagane.tetsu-2021-076","url":null,"abstract":": To develop microstructure control concepts for ensuring the toughness of high-strength steel plates, ba-sic research was conducted using ferrite single-phase steels with different amounts of C, and the effects of the states of C were investigated along with those of solute N. In this study, Fe-0.017C (mass%) alloy, wherein the state of C was changed to a solid solution, intragranular cementite, and intergranular cementite, were used for microstructural observation, Charpy testing, and fracture surface investigation. The results reveal that the toughness of the intragranular cementite steel was the best, followed by that of solute C steel and intergranular cementite steel. In intergranular cementite steel with significantly in-ferior toughness, the coarse intergranular cementite leads to dislocation pile-up, initial crack formation, and macroscopic brittle fracture. The brittle fracture of intragranular cementite steel was caused by the deformation twins. It is thought that the fine intragranular cementite only had a minor effect on the crack initiation and dislocation mobility. Twin was also confirmed at the initiation point of brittle fracture in the solute C steel. Hence, it was deduced that the deterioration of toughness caused by solute C resulted from the promotion of twinning, which replaced the dislocation movements. However, the deterioration of toughness caused by solute C was smaller compared with that caused by solute N, which partly caused intergranular fracture. This is attributed to the suppression of intergranular fracture by the presence of a small amount of solute C.","PeriodicalId":22340,"journal":{"name":"Tetsu To Hagane-journal of The Iron and Steel Institute of Japan","volume":"65 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73367164","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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