{"title":"Effect of sintering conditions on the hardness of porous pure magnesium fabricated by MM-SPS process","authors":"Takumi Inomiya, Masahiro Kubota","doi":"10.2464/jilm.74.28","DOIUrl":"https://doi.org/10.2464/jilm.74.28","url":null,"abstract":"","PeriodicalId":16292,"journal":{"name":"Journal of Japan Institute of Light Metals","volume":"42 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140507422","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":"Surface adhesion enhancement of A5052 aluminum alloy by surface texturing with a UV pulsed laser","authors":"R. Kuwano, Makoto Hino, Tsuyoshi Tokunaga, Norihito Nagata, Toshihiko Koga, Nathan Hagen, Yukitoshi Otani","doi":"10.2464/jilm.74.18","DOIUrl":"https://doi.org/10.2464/jilm.74.18","url":null,"abstract":"","PeriodicalId":16292,"journal":{"name":"Journal of Japan Institute of Light Metals","volume":"101 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140507961","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 chemical composition and microstructure on the thermal conductivity of Mg-Al-Ca alloys","authors":"Yuichi Kirimoto, Natsuki Kondo, Mizuki Ito, Tadayoshi Tsukeda, Tetsuo Aida, Hironobu Tabata, Hideki Kurihara, Mayumi Suzuki","doi":"10.2464/jilm.74.9","DOIUrl":"https://doi.org/10.2464/jilm.74.9","url":null,"abstract":"","PeriodicalId":16292,"journal":{"name":"Journal of Japan Institute of Light Metals","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140507160","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":"AZ91Dマグネシウム合金の機械的特性と析出物の体積率との関係","authors":"Hideaki Iwaoka, Masaya Iwasaki, Hiroyuki Watanabe","doi":"10.2464/jilm.74.22","DOIUrl":"https://doi.org/10.2464/jilm.74.22","url":null,"abstract":"","PeriodicalId":16292,"journal":{"name":"Journal of Japan Institute of Light Metals","volume":"55 8-10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140507638","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 Cu addition on electrochemical activity of ribbons of Mg-Al-Ca anode materials for magnesium rechargeable batteries manufactured by rapid solidification method","authors":"Shunsaku Fukui, Tadayoshi Tsukeda, Tetsuo Aida, Hironobu Tabata, Hideki Kurihara, Mayumi Suzuki","doi":"10.2464/jilm.74.14","DOIUrl":"https://doi.org/10.2464/jilm.74.14","url":null,"abstract":"","PeriodicalId":16292,"journal":{"name":"Journal of Japan Institute of Light Metals","volume":"32 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140507196","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":"Investigation of manufacturing conditions of single roll rapidly solidified ribbon for anode materials of magnesium rechargeable batteries","authors":"Yuichi Kirimoto, Kousuke Fuke, Tadayoshi Tsukeda, Tetsuo Aida, Yasunori Nemoto, Minoru Ikeda, Hironobu Tabata, Hideki Kurihara, Mayumi Suzuki","doi":"10.2464/jilm.73.537","DOIUrl":"https://doi.org/10.2464/jilm.73.537","url":null,"abstract":"","PeriodicalId":16292,"journal":{"name":"Journal of Japan Institute of Light Metals","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139275837","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}
Ryota Higa, H. Fujihara, H. Toda, M. Kobayashi, Kenichi Ebihara, Akihisa Takeuchi
{"title":"Multi-modal 3D image-based simulation of hydrogen embrittlement crack initiation in Al-Zn-Mg alloy","authors":"Ryota Higa, H. Fujihara, H. Toda, M. Kobayashi, Kenichi Ebihara, Akihisa Takeuchi","doi":"10.2464/jilm.73.530","DOIUrl":"https://doi.org/10.2464/jilm.73.530","url":null,"abstract":"","PeriodicalId":16292,"journal":{"name":"Journal of Japan Institute of Light Metals","volume":"161 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139271177","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}
Akihiro Choshi, Tianqi Zhu, Naoki Takata, Asuka Suzuki, M. Kobashi
{"title":"単結晶マイクロピラー圧縮試験を用いたAl-Fe合金積層造形体の高強度支配因子の検討","authors":"Akihiro Choshi, Tianqi Zhu, Naoki Takata, Asuka Suzuki, M. Kobashi","doi":"10.2464/jilm.73.523","DOIUrl":"https://doi.org/10.2464/jilm.73.523","url":null,"abstract":"","PeriodicalId":16292,"journal":{"name":"Journal of Japan Institute of Light Metals","volume":"12 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139275978","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}
Rei Yano, Masaki Tanaka, Shigeto Yamasaki, Tatsuya Morikawa, Tomohito Tsuru
Impact tests and tensile tests were conducted between 77 K and 450 K in order to elucidate the temperature dependence of absorbed-impact energy, yield stress, effective shear stress, activation volume, and activation enthalpy. The impact-absorbed energy decreased with decreasing test temperature, however, this alloy did not undergo low-temperature embrittlement although it has a bcc structure. Tensile tests showed changes in both the work-hardening rate and the temperature dependence of yield stress at approximately 150 K. This suggests a change in the mechanism behind the plastic deformation at the temperature. The temperature dependence of the activation enthalpy for dislocation glide suggests that the process of climbing over the Peierls potential (kink-pair nucleation) is the dominant mechanism for the dislocation glide from 150 K to 200 K, while the interaction between a dislocation and solute atoms dominantly controls the dislocation glide above 200 K. Superelasticity appears in stress-strain curves tested below 120 K, suggesting that the yielding is governed by transformation-induced plasticity below 120 K. The enhanced toughness at low temperatures in these alloys is discussed from the viewpoint of dislocation shielding theory.
{"title":"<i>β</i>型チタン合金Ti-22V-4Alにおける変形・破壊挙動の温度依存性","authors":"Rei Yano, Masaki Tanaka, Shigeto Yamasaki, Tatsuya Morikawa, Tomohito Tsuru","doi":"10.2464/jilm.73.497","DOIUrl":"https://doi.org/10.2464/jilm.73.497","url":null,"abstract":"Impact tests and tensile tests were conducted between 77 K and 450 K in order to elucidate the temperature dependence of absorbed-impact energy, yield stress, effective shear stress, activation volume, and activation enthalpy. The impact-absorbed energy decreased with decreasing test temperature, however, this alloy did not undergo low-temperature embrittlement although it has a bcc structure. Tensile tests showed changes in both the work-hardening rate and the temperature dependence of yield stress at approximately 150 K. This suggests a change in the mechanism behind the plastic deformation at the temperature. The temperature dependence of the activation enthalpy for dislocation glide suggests that the process of climbing over the Peierls potential (kink-pair nucleation) is the dominant mechanism for the dislocation glide from 150 K to 200 K, while the interaction between a dislocation and solute atoms dominantly controls the dislocation glide above 200 K. Superelasticity appears in stress-strain curves tested below 120 K, suggesting that the yielding is governed by transformation-induced plasticity below 120 K. The enhanced toughness at low temperatures in these alloys is discussed from the viewpoint of dislocation shielding theory.","PeriodicalId":16292,"journal":{"name":"Journal of Japan Institute of Light Metals","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135766493","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}
Pure magnesium (Mg) powders together with different amounts of process control agent (PCA) were mechanically milled (MMed) using a vibration ball mill. Stearic acid was used as process control agent (PCA) for the mechanical milling (MM) process. The MMed powders were consolidated into bulk materials by the spark plasma sintering (SPS). Changes in hardness and solid-state reactions of the SPS materials have been examined by hardness measurements and an X-ray diffraction (XRD), respectively. A maximum hardness value of 102 HV obtained in the SPS materials fabricated from MMed 24 h powders with PCA1.50 g at sintering temperature of 823 K for 60 min. Formation of MgO by solid-state reaction was observed for the SPS materials consolidated from MMed 24 h powders with PCA1.00 g and 1.50 g. The amount of MgO formation increased with increasing sintering time. No correlation was observed between MgO formation and hardness. The Vickers hardness of the SPS materials improved by increasing sintering temperature. However, no significant change in hardness and constituent phases was observed with increasing sintering time. Pure Mg of hardness can be improved by MM-SPS process.
{"title":"MM-SPSプロセスで作製した純マグネシウムの硬さに及ぼす焼結保持時間の影響","authors":"Takumi Inomiya, Masahiro Kubota","doi":"10.2464/jilm.73.491","DOIUrl":"https://doi.org/10.2464/jilm.73.491","url":null,"abstract":"Pure magnesium (Mg) powders together with different amounts of process control agent (PCA) were mechanically milled (MMed) using a vibration ball mill. Stearic acid was used as process control agent (PCA) for the mechanical milling (MM) process. The MMed powders were consolidated into bulk materials by the spark plasma sintering (SPS). Changes in hardness and solid-state reactions of the SPS materials have been examined by hardness measurements and an X-ray diffraction (XRD), respectively. A maximum hardness value of 102 HV obtained in the SPS materials fabricated from MMed 24 h powders with PCA1.50 g at sintering temperature of 823 K for 60 min. Formation of MgO by solid-state reaction was observed for the SPS materials consolidated from MMed 24 h powders with PCA1.00 g and 1.50 g. The amount of MgO formation increased with increasing sintering time. No correlation was observed between MgO formation and hardness. The Vickers hardness of the SPS materials improved by increasing sintering temperature. However, no significant change in hardness and constituent phases was observed with increasing sintering time. Pure Mg of hardness can be improved by MM-SPS process.","PeriodicalId":16292,"journal":{"name":"Journal of Japan Institute of Light Metals","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135766343","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}
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