Pub Date : 2023-09-01DOI: 10.2320/matertrans.mt-mg2022018
Wb Wu, J. Kasiuk, J. Przewoźnik, C. Kapusta, I. Svito, K. Tung Do, T. H. Huong Nguyen, H. Manh Dinh, J. Åkerman, T. A. Anh Nguyen
{"title":"Fundamentally Different Magnetoresistance Mechanisms in Related Co/Pd and Co/Pt Multilayers for Spintronic Applications","authors":"Wb Wu, J. Kasiuk, J. Przewoźnik, C. Kapusta, I. Svito, K. Tung Do, T. H. Huong Nguyen, H. Manh Dinh, J. Åkerman, T. A. Anh Nguyen","doi":"10.2320/matertrans.mt-mg2022018","DOIUrl":"https://doi.org/10.2320/matertrans.mt-mg2022018","url":null,"abstract":"","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47003967","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 : 2023-09-01DOI: 10.2320/matertrans.mt-mg2022017
T.N. Anh Nguyen, Q. Pham, V. Chu, K. T. Do, T. H. Nguyen, H. Pham, M. Goto, M. Fukumoto, Hiroyuki Tomita, Tatsuki Watanabe, H. Kubota, A. Fukushima, Kei Yakushiji, Yoshishige Suzuki
{"title":"Highly Sensitive Detection of Weak Low Frequency Magnetic Fields Using Single Nanoscale Orthogonal MgO Magnetic Tunnel Junctions under a Large Bias Field","authors":"T.N. Anh Nguyen, Q. Pham, V. Chu, K. T. Do, T. H. Nguyen, H. Pham, M. Goto, M. Fukumoto, Hiroyuki Tomita, Tatsuki Watanabe, H. Kubota, A. Fukushima, Kei Yakushiji, Yoshishige Suzuki","doi":"10.2320/matertrans.mt-mg2022017","DOIUrl":"https://doi.org/10.2320/matertrans.mt-mg2022017","url":null,"abstract":"","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43241157","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 : 2023-09-01DOI: 10.2320/matertrans.mt-mi2022007
Jun-Ha Jeon, Yoonje Sung, Namhyuk Seo, Jae-Gil Jung, S. Son, Seok-Jae Lee
{"title":"Machine Learning Model and Prediction Mechanisms of Bainite Start Temperature of Low Alloy Steels","authors":"Jun-Ha Jeon, Yoonje Sung, Namhyuk Seo, Jae-Gil Jung, S. Son, Seok-Jae Lee","doi":"10.2320/matertrans.mt-mi2022007","DOIUrl":"https://doi.org/10.2320/matertrans.mt-mi2022007","url":null,"abstract":"","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43501437","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 : 2023-09-01DOI: 10.2320/matertrans.mt-c2023003
Masashi Nishimoto, Izumi Muto, Yu Sugawara
This paper reviews recent studies on the relationships between local electrochemical properties at the steel/inclusion boundary and pitting corrosion resistance of stainless steels. The effect of Mo addition to the steel matrix on the local dissolution behavior at the steel/inclusion boundary is explained. The inhibition of inclusion dissolution is beneficial for improving the pitting corrosion resistance of stainless steels. The importance of spark plasma sintering and microelectrochemical techniques in the research on localized corrosion processes are briefly discussed. We also discuss novel methods for improving the pitting corrosion resistance of stainless steels, such as the addition of corrosion inhibitors.
{"title":"Review—Understanding and Controlling the Electrochemical Properties of Sulfide Inclusions for Improving the Pitting Corrosion Resistance of Stainless Steels","authors":"Masashi Nishimoto, Izumi Muto, Yu Sugawara","doi":"10.2320/matertrans.mt-c2023003","DOIUrl":"https://doi.org/10.2320/matertrans.mt-c2023003","url":null,"abstract":"This paper reviews recent studies on the relationships between local electrochemical properties at the steel/inclusion boundary and pitting corrosion resistance of stainless steels. The effect of Mo addition to the steel matrix on the local dissolution behavior at the steel/inclusion boundary is explained. The inhibition of inclusion dissolution is beneficial for improving the pitting corrosion resistance of stainless steels. The importance of spark plasma sintering and microelectrochemical techniques in the research on localized corrosion processes are briefly discussed. We also discuss novel methods for improving the pitting corrosion resistance of stainless steels, such as the addition of corrosion inhibitors.","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":"54 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135830276","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 : 2023-09-01DOI: 10.2320/matertrans.mt-l2023009
Ryota Nagata, Yoshiki Tomura, Takaomi Itoi
The Mg0.1In0.9 phase with FCC structure was formed in Mg–In and Mg–Al–In alloys. The LCR (Limiting Cold-Rolling ratio) at room temperature tended to increase with increasing area fraction of the Mg0.1In0.9 phase, and the LCR achieved 80% for the single Mg0.1In0.9 phase in both alloys. The hardness value of the Mg0.1In0.9 phase in the Mg–In binary alloys increased after rolling originated from grain-refinement by recrystallization and precipitation hardening due to processing heat generated by rolling at room temperature. On the other hand, the Mg0.1In0.9 phase formed in the Mg–Al–In ternary alloys was stable at room temperature and work hardened after rolling. Since the Mg0.1In0.9 phase dissolves about 5 mol% of Al, substituting Al for In in the Mg–In alloy was effective in reducing density. The density of the Mg80Al7In13 (mol%) alloy is 2.60 Mg/m3, which is lower than that of Al, and the LCR showed 49%. In Mg–In alloys, the substitution of Al is effective in developing alloys that are easy to process at room temperature and have low density, because the Mg0.1In0.9 phase has a solid solution of Al and contributes to phase stabilization at room temperature.
{"title":"Microstructure of Mg–In Alloy Systems and Their Room Temperature Rollability","authors":"Ryota Nagata, Yoshiki Tomura, Takaomi Itoi","doi":"10.2320/matertrans.mt-l2023009","DOIUrl":"https://doi.org/10.2320/matertrans.mt-l2023009","url":null,"abstract":"The Mg0.1In0.9 phase with FCC structure was formed in Mg–In and Mg–Al–In alloys. The LCR (Limiting Cold-Rolling ratio) at room temperature tended to increase with increasing area fraction of the Mg0.1In0.9 phase, and the LCR achieved 80% for the single Mg0.1In0.9 phase in both alloys. The hardness value of the Mg0.1In0.9 phase in the Mg–In binary alloys increased after rolling originated from grain-refinement by recrystallization and precipitation hardening due to processing heat generated by rolling at room temperature. On the other hand, the Mg0.1In0.9 phase formed in the Mg–Al–In ternary alloys was stable at room temperature and work hardened after rolling. Since the Mg0.1In0.9 phase dissolves about 5 mol% of Al, substituting Al for In in the Mg–In alloy was effective in reducing density. The density of the Mg80Al7In13 (mol%) alloy is 2.60 Mg/m3, which is lower than that of Al, and the LCR showed 49%. In Mg–In alloys, the substitution of Al is effective in developing alloys that are easy to process at room temperature and have low density, because the Mg0.1In0.9 phase has a solid solution of Al and contributes to phase stabilization at room temperature.","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136265495","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 : 2023-09-01DOI: 10.2320/matertrans.mt-m2023019
Shuyi Wang, Song Zhang, Yonggang Xu
{"title":"Hot Deformation Behaviour and Deformation Microstructure of an Al–Zn–Ce Damping Alloy","authors":"Shuyi Wang, Song Zhang, Yonggang Xu","doi":"10.2320/matertrans.mt-m2023019","DOIUrl":"https://doi.org/10.2320/matertrans.mt-m2023019","url":null,"abstract":"","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44188015","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 : 2023-09-01DOI: 10.2320/matertrans.mt-mg2022008
Cong Doanh Sai, V. T. Pham, Thị Ngọc Lam Trần, T. Tran, Thi Ngoc Minh Vu, Thi-Lan-Huong Hoang, Anh Son Pham, Thi Minh Thuy Nguyen, Thi Thu Hoai Duong, H. Do
{"title":"Construction of Highly Condensed Cu2O/CuO Composites on Cu Sheet and Its Photocatalytic in Photodegradation of Hazardous Colouring Agent Rose Bengal","authors":"Cong Doanh Sai, V. T. Pham, Thị Ngọc Lam Trần, T. Tran, Thi Ngoc Minh Vu, Thi-Lan-Huong Hoang, Anh Son Pham, Thi Minh Thuy Nguyen, Thi Thu Hoai Duong, H. Do","doi":"10.2320/matertrans.mt-mg2022008","DOIUrl":"https://doi.org/10.2320/matertrans.mt-mg2022008","url":null,"abstract":"","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43202390","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 : 2023-09-01DOI: 10.2320/matertrans.mt-m2023018
Koichi Nakagawa, Tatsuya Nakagaito, S. Nakajima, M. Nagoshi, Y. Tamai, J. Hiramoto, A. Yoshitake
{"title":"Effect of Micro-Crack Depth on Fatigue Property in Zn–Ni Coated Press Hardened Steel","authors":"Koichi Nakagawa, Tatsuya Nakagaito, S. Nakajima, M. Nagoshi, Y. Tamai, J. Hiramoto, A. Yoshitake","doi":"10.2320/matertrans.mt-m2023018","DOIUrl":"https://doi.org/10.2320/matertrans.mt-m2023018","url":null,"abstract":"","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":"36 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69111962","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 : 2023-09-01DOI: 10.2320/matertrans.mt-y2023003
Takahisa Yamamoto
Flash sintering was first reported in 2010 by a research group of Raj et al. at Colorado University. Since then, flash sintering has attracted attention as an innovative sintering method that uses the steep power spike, generated when ceramic green compact is heated while an electric field, is applied to densify ceramic green compact in an instant. However, there are several technical challenges that must be overcome before flash sintering can be used as a practical sintering method. This paper outlines the problems and improvements related to flash sintering from a viewpoint of sintering method and introduces the improved flash sintering noted as shrinkage-rate controlled flash sintering developed by the author.
{"title":"Improvements in Flash Sintering for Practical Application","authors":"Takahisa Yamamoto","doi":"10.2320/matertrans.mt-y2023003","DOIUrl":"https://doi.org/10.2320/matertrans.mt-y2023003","url":null,"abstract":"Flash sintering was first reported in 2010 by a research group of Raj et al. at Colorado University. Since then, flash sintering has attracted attention as an innovative sintering method that uses the steep power spike, generated when ceramic green compact is heated while an electric field, is applied to densify ceramic green compact in an instant. However, there are several technical challenges that must be overcome before flash sintering can be used as a practical sintering method. This paper outlines the problems and improvements related to flash sintering from a viewpoint of sintering method and introduces the improved flash sintering noted as shrinkage-rate controlled flash sintering developed by the author.","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136161524","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 : 2023-08-01DOI: 10.2320/matertrans.mt-l2023006
Kensuke Kurihara, Ivan Lobzenko, Tomohito Tsuru, Ai Serizawa
Nanoclusters formed in Al–Mg–Si alloys affect the aging behavior of the alloys depending on the formation temperature. In the present study, first-principles calculations were carried out to evaluate the two- and three-body interactions between Mg, Si atoms and vacancies in the Al matrix and estimate the effect of local bonding on the formation of nanoclusters. Monte Carlo simulations were subsequently performed to investigate the stable structure of the nanocluster formed in Al–0.95 mass pct Mg–0.81 mass pct Si alloy. We found that the Mg–Si and Si–Vac pairs are stable in the Al matrix. The result shows that the solute atoms easily aggregate with different types of solute atoms and that the Si atom has a strong attractive interaction with a vacancy. Furthermore, Mg–Si–vacancy triplets are more stable than Mg–Si and Si–vacancy pairs in the Al matrix. The nanoclusters in the Al matrix were thermally stabilized by the stable configurations between solute atoms and vacancy. Thus, the electronic structure calculations suggested that the local bondings within a nanocluster play a significant role in not only the thermal stability but also the formation and growth behavior of nanoclusters during aging at low temperatures.
{"title":"Effects of Local Bonding between Solute Atoms and Vacancy on Formation of Nanoclusters in Al–Mg–Si Alloys","authors":"Kensuke Kurihara, Ivan Lobzenko, Tomohito Tsuru, Ai Serizawa","doi":"10.2320/matertrans.mt-l2023006","DOIUrl":"https://doi.org/10.2320/matertrans.mt-l2023006","url":null,"abstract":"Nanoclusters formed in Al–Mg–Si alloys affect the aging behavior of the alloys depending on the formation temperature. In the present study, first-principles calculations were carried out to evaluate the two- and three-body interactions between Mg, Si atoms and vacancies in the Al matrix and estimate the effect of local bonding on the formation of nanoclusters. Monte Carlo simulations were subsequently performed to investigate the stable structure of the nanocluster formed in Al–0.95 mass pct Mg–0.81 mass pct Si alloy. We found that the Mg–Si and Si–Vac pairs are stable in the Al matrix. The result shows that the solute atoms easily aggregate with different types of solute atoms and that the Si atom has a strong attractive interaction with a vacancy. Furthermore, Mg–Si–vacancy triplets are more stable than Mg–Si and Si–vacancy pairs in the Al matrix. The nanoclusters in the Al matrix were thermally stabilized by the stable configurations between solute atoms and vacancy. Thus, the electronic structure calculations suggested that the local bondings within a nanocluster play a significant role in not only the thermal stability but also the formation and growth behavior of nanoclusters during aging at low temperatures.","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135872426","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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