Journal of the Japan Institute of Metals and Materials最新文献

{"title":"Designing of Flux Composition in Copper Alloy Melting Process to Achieve Good Balance between Suppression of Refractory Corrosion and Acceleration of MnO Dissolution into Flux Using Neural Network and Thermodynamic Computation","authors":"Itaru Hasegawa, T. Koizumi, K. Kita, Masanori Suzuki, Toshihiro Tanaka","doi":"10.2320/JINSTMET.J2020063","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2020063","url":null,"abstract":"A new method of designing a fl ux for the copper alloy melting process that can achieve a good balance between the suppression of refractory corrosion by the fl ux and the acceleration of MnO dissolution into the fl ux was proposed. In this study, NN ( neural network ) computation was used to evaluate the refractory corrosion by the fl ux, and the predicted amounts of corrosion of refractories were in good agreement with experimental data. For the evaluation of the properties related to the MnO dissolution into the fl ux, both the viscosity of fl uxes and the activity of MnO in fl uxes were examined using thermodynamic analysis. By integrating the results of the above evaluations, an e ffi cient method of designing the fl ux composition was devised. As an example of the application for this method, SiO 2 – 55mass ％ Na 2 O fl ux was found to be the optimal fl ux when Al 2 O 3 refractory was employed. ［ doi:10.2320 / jinstmet.J2020063 ］","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"152 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85152636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of Textured Porous Ti3SiC2 by Slip Casting under High Magnetic Field and Microstructural Evolution through High Temperature Deformation","authors":"N. Hashimoto, K. Ikeda, S. Miura, K. Morita, Tohru S. Suzuki, Y. Sakka","doi":"10.2320/JINSTMET.J2021001","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2021001","url":null,"abstract":"To clarify the effect of constraint conditions on the kink formation, fabrication process of the texture and porosity controlled Ti3SiC2 polycrystals was investigated and microstructural evolution during high temperature deformation was examined in it under high temperature uniaxial compression tests at 1200℃. Dense textured Ti3SiC2 sintered body was fabricated by slip casting in the high magnetic field of 12 T and following pressureless sintering at 1400℃ for 1 h. The porosity of the textured Ti3SiC2 was controlled by dispersing polymethyl methacrylate (PMMA) particles into the textured Ti3SiC2 as a spacer media. The highly textured Ti3SiC2 polycrystals with porosity of 8.4 vol％ and 16.7 vol％, respectively, were successfully fabricated by the slip casting in the high magnetic field. After the high temperature uniaxial compression perpendicular to the c-axis of the textured structure, both the porous and dense Ti3SiC2 showed kink formation, which is a common deformation mode for anisotropic layered materials. However, the average rotation angles of the kink boundaries were higher in the porous specimen than in the dense specimen. Since the crystal rotation is necessary for the kink formation, kink bands would be preferably developed in the porous area due to its weaker constraint than in the dense area. It can be concluded from the microstructural analysis that the constrain factor caused by the neighbor grains affects the crystalline rotation, resulting in the kink boundary formation with different rotation angles.","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"138 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75848964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Polymer Additives and Chloride Ions on Electrodeposition Behavior and Morphology of Electrolytic Copper Powder","authors":"K. Ochi, M. Sekiguchi, S. Oue, Hiroaki Nakano","doi":"10.2320/JINSTMET.J2021018","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2021018","url":null,"abstract":"To investigate the effect of polymer additives and chloride ions on the electrodeposition behavior and morphology of copper powder, the polarization curves were measured and constant current electrolysis of 300 A·m−2 and 500 A·m−2 was conducted in an electrolytic solution containing 0.079 mol·dm−3 of Cu2+ and 0.5 mol·dm−3 of free H2SO4 at 293K and 393 K without stirring. Polyethylene glycol (PEG) and polyethyleneimine (PEI) were used as polymer additives. PEG and PEI had a suppressing effect on the electrodeposition of copper powder. The current efficiency for Cu deposition decreased with the addition of PEG and PEI. The addition of PEG decreased the average particle size of the copper powder, while PEI didn’t change the average particle size. When Cl− coexisted with PEG, the suppressing effect on the electrodeposition of copper powder became even greater and the particle size of the copper powder became finer than when Cl− or PEG was added alone.","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87604042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural Phase Transformations of Gallium Ion Irradiated SUS304 Steel","authors":"Hanako Tsuruta, K. Shimizu, T. Murakami, Y. Kamada, H. Watanabe","doi":"10.2320/JINSTMET.J2021006","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2021006","url":null,"abstract":"The plan–view and cross–sectional microstructures of SUS304 steel irradiated by gallium focused–ion beam were investigated using electron backscatter diffraction and energy dispersive X–ray spectroscopy. Structural phase transformation and gallium implantation were confirmed in the region of irradiated austenite grains. The amount of bcc phase and gallium concentration increased with increasing irradiation dose, which suggests that gallium implantation plays an important role as a ferrite stabilizer and also the source of stress effect. Crystallographic orientation relationships between bcc phase and austenite matrix were analyzed by considering the angular deviation between closed–packed planes and closed–packed directions. Differences in transformation behaviors between (001) and (111) austenite grains were discussed from the view–points of fcc–bcc interface structures. [doi:10.2320/jinstmet.J2021006]","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81192972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Halide Ions on Electrodeposition Behavior and Morphology of Electrolytic Copper Powder","authors":"K. Ochi, M. Sekiguchi, S. Oue, Hiroaki Nakano","doi":"10.2320/JINSTMET.J2021008","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2021008","url":null,"abstract":"To investigate the e ff ect of halide ions on the electrodeposition behavior and morphology of copper powder, the polarization curves were measured and constant current electrolysis of 300A·m − 2 and 500A·m − 2 was conducted in an electrolytic solution of 0.079mol·dm − 3 of Cu 2+ and 0.5mol·dm − 3 of free H 2 SO 4 at 293K and 303K without stirring. In the deposition of copper powder, Cl − had a promoting e ff ect on the deposition of copper powder, while Br − and I − had a suppressing e ff ect. The current e ffi ciency for Cu deposition increased with the addition of Cl − and decreased with Br − . The addition of Cl − reduced the average particle size of the copper powder and grown dendrite – shaped branches and trunks, resulting in a lower tap density. On the other hand, when Br − was added, the average particle size and crystallite size of the copper powder became smaller, and the tap density also became smaller. With increasing Cl − concentration in solution, the current e ffi ciency for Cu deposition increased, that is, copper deposition was promoted even in the di ff usion rate – determining region of Cu 2+ ions, showing that the deposition of copper powder was a ff ected by the charge transfer process for Cu deposition. The change in morphology of Cu powder with halide ions is attributed to change of the charge transfer process. The deposition of Cu powder seems to proceed under a mixed rate – determining process of the di ff usion of Cu 2+ ions and charge transfer. ［ doi:10.2320 / jinstmet.J2021008 ］","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83266937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bibliometric Analysis of Academic Journals in the Area of Materials Science and Engineering for the Benchmarking of Materials Transactions","authors":"Kotaro Takeda, Marc Hansen, Y. Ikenoue, T. Nagasaka","doi":"10.2320/JINSTMET.J2021003","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2021003","url":null,"abstract":"Bibliometric analysis has been conducted against eight representative academic journals, Materials Transactions, Acta Materialia, Scripta Materialia, Journal of Alloys and Compounds, Metallurgical and Materials Transactions A, Materials Science and Engineering A, ISIJ International and Science and Technology of Advanced Materials in order to make clear and benchmark the current status of Materials Transactions in the area of materials science and engineering. The status of each journal has been analyzed and comprehensively discussed based on the annual trend of number of published papers, citation per paper, journal impact factor, number and country a ffi liations of authors, rate of zero – citation articles and so forth. The major conclusions are as following: ( 1 ) the decrease in zero – citation articles in Material Transactions and ISIJ International is very slower against passed time than other six journals, and thus approximately 3 of papers in Material Transactions published in remain un – cited. One of the of may be self – by the themselves. ( The average number of references per paper in Material Transactions and ISIJ is less than in the The of the references are generally cited in the introductory part in to review the explain the originality of their research. These results suggest that the coverage of previous papers and the claim of the expected impact given by their research may be insu ffi cient and thus give a negative e ff ect on the citation for Material Transactions. ［ doi:10.2320 / jinstmet.J2021003 ］ ( )","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90165467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Bending-Tension Deformation on Texture Evolution and Room Temperature Formability of AZ31 Alloy Sheet Rolled at High Temperature","authors":"Yuya Ishiguro, Xinsheng Huang, Yuhki Tsukada, T. Koyama, Y. Chino","doi":"10.2320/JINSTMET.JBW202001","DOIUrl":"https://doi.org/10.2320/JINSTMET.JBW202001","url":null,"abstract":"Bending – tension deformations were conducted to AZ31B ( Mg – 3mass ％ Al – 1mass ％ Zn ) alloy sheets with weak basal texture intensity and RD ( rolling direction ) – split texture, which were processed by high – temperature rolling. E ff ects of process pass number of bending – tension deformation on the texture formation and related room temperature formability were investigated. 1 pass bending – tension deformation contributed to signi fi cant increase in the RD – split angle from 13 ° to 25 ° , and additional bending – tension deformation only contributed to slight increase in the RD – split angle. 7 pass bending – tension deformation increased basal texture intensity from 2.9 to about 4.5, which was still much lower than those of commercial AZ31B alloy sheets. Specimens subjected to less than 5 pass bending – tension deformations kept signi fi cant stretch formability ( 8.0mm of Erichsen value ) . However, specimens subjected to 7 pass bending – tension deformation exhibited deteriorated Erichsen value of 6.7mm regardless of the high RD – split angle, low basal texture intensity and high average Schmid factor. As a result of microstructural observation, it was revealed that repetition of bending – tension deformation generated area with coarse grains at near surface. In addition, repetition of bending – tension deformation induced duplex microstructure at the surface, where layers of fi ne grains and coarse grains were distributed along to the RD on the RD – TD ( transverse direction ) plane. It was suggested that the above microstructural changes induced inhomogeneous deformation at grain boundaries and in double twinning, resulting in the deterioration of the stretch formability of the specimens subjected to 7 pass bending – tension deformation. ［ doi:10.2320 / jinstmet.JBW202001 ］","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77756741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Heating Order on Interference between Deformations by Curved Line Heating in Laser Forming","authors":"T. Akiyama, T. Kitamura, Ryosuke Izutsu, Y. Maeda","doi":"10.2320/JINSTMET.J2020033","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2020033","url":null,"abstract":"Laser forming is one of a few processing methods that can form a plate material into a curved surface without contact and without using a mold. A combination of multiple curved heating lines is required to form a practical shape. The relationship between heating conditions and deformation has been studied in detail in the field of welding, etc. when the heating line is straight. However, there are not many reports investigating the effect of interference between heating lines on deformation. Therefore, in this study, we investigated the interference effect of multiple heating lines with different heating order on angular distortion in laser forming under different two conditions, straight heating lines and curved heating lines. Annealed austenitic stainless steel sheet material with 0.75mm thick was used as the test material for the laser forming with 1500W YAG laser before deformation measurement by using a non–contact three–dimensional coordinate measuring device. From the relationship between the heating order and the angular distortions of the three heating lines arranged concentrically, the influence of the area inside and outside of the curved heating line on the angular distortion behavior of the other heating lines was investigated. When the heating was repeated inside the curved heating line, the inner heating hardly interfered with the angular deformation of the outer heating line, but the angular distortion on the heating line placed inside was changed. When the heating lines were placed on the outside in order, the amount of angular distortion of the heating lines placed earlier changed depending on the heating lines placed later. When considering the curved heating part by classifying it into the inside and outside of the curve, the ability to interfere with the angular distortion of other heating lines was observed inside, but not outside. When laser forming curved surface using multiple curved heating, it was found that the classification of the inner and outer regions of the curved heating part and the heating order are important for examining the interference between the heating lines. [doi:10.2320/jinstmet.J2020033]","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90671647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nucleation-Controlled Phase Selection in Rapid Solidification from Undercooled Melt of DyMnO3","authors":"Y. Hayasaka, K. Kuribayashi, Suguru Shiratori, S. Ozawa","doi":"10.2320/MATERTRANS.MT-M2021047","DOIUrl":"https://doi.org/10.2320/MATERTRANS.MT-M2021047","url":null,"abstract":"1Graduate School of Engineering, Chiba Institute of Technology, Narashino 275-0016, Japan 2Research Liaison Centre, Chiba Institute of Technology, Narashino 275-0016, Japan 3Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan 4Department of Mechanical Systems Engineering, Faculty of Engineering, Tokyo City University, Tokyo 158-8557, Japan 5Department of Advanced Materials Science and Engineering, Chiba Institute of Technology, Narashino 275-0016, Japan","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85727161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wettability of Pure Metals with Liquid Sodium and Liquid Tin","authors":"Jun-ichi Saito, Y. Kobayashi, H. Shibutani","doi":"10.2320/MATERTRANS.MT-M2021107","DOIUrl":"https://doi.org/10.2320/MATERTRANS.MT-M2021107","url":null,"abstract":"This study aims to control the wettability of pure transition metals by liquid sodium or liquid tin. Such wettability was evaluated by measuring the contact angles with the droplet method. Pure titanium, iron, nickel, copper, and molybdenum metals were selected as specimens in this experiment. All experiments were conducted in an environment with high pure argon gas and extremely low moisture to avoid the in fl uence of oxygen on the liquid metals. The measurement temperature was just above the melting temperature of each liquid metal. Results showed that in both liquid sodium and liquid tin, the measured contact angle changed depending on the atomic number of the substrate metal. The electronic structure of the interface between a liquid metal and a substrate metal was calculated by the molecular orbital method. Simple cluster models of the interface between the liquid metal and substrate transition metal were used in this calculation. The calculation results con fi rmed that the electronic state of the interface was expressed well. The magnitude of the atomic bonding between the liquid metal and substrate metal changed in accordance with the atomic number of the substrate metal, and the magnitude of the atomic bonding between the substrate metals changed similarly. There was an evident relationship between the atomic bonding ratio and the contact angle. The atomic bonding ratio is the ratio of the liquid-metal-substrate metal-atomic bonding to the substrate metal atomic bonding. This fi nding implies that the atomic bonding a ff ected the wettability between the liquid metal and the substrate metal. The atomic bonding was obtained as one of the indications was obtained to control the wettability by liquid metal. [doi:10.2320 / matertrans.MT-M2021107] (Received","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"146 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83798846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}