Pub Date : 2022-04-01DOI: 10.2320/jinstmet.j2021029
H. Takebe, K. Ushioda
{"title":"Effects of Grain Size, Thickness and Tensile Direction on Yield Behavior of Pure Titanium Sheet","authors":"H. Takebe, K. Ushioda","doi":"10.2320/jinstmet.j2021029","DOIUrl":"https://doi.org/10.2320/jinstmet.j2021029","url":null,"abstract":"","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90733467","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":"Damage Evaluation of Carburizing Gear for Remanufacturing","authors":"Tomohisa Kanazawa, M. Hayakawa, M. Yoshimoto, Yuuki Tahara, Norihito Hata, Susumu Meguro, T. Hiroto, Y. Matsushita, M. Sugawara","doi":"10.2320/JINSTMET.J2020034","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2020034","url":null,"abstract":"Tomohisa Kanazawa1, Masao Hayakawa2, Mitsuhiro Yoshimoto1, Yuuki Tahara3, Norihito Hata1, Susumu Meguro2, Takanobu Hiroto2, Yoshitaka Matsushita2 and Michio Sugawara1 1 Remanufacturing Promotion Division, Parts Department, Hitachi Construction Machinery Co., Ltd., Tsuchiura 300–0013 2 National Institute for Materials Science (NIMS), Tsukuba 305–0047 3 Production Engineering Division, Production & Procurement Group, Hitachi Construction Machinery Co., Ltd., Tsuchiura 300–0013","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73210901","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}
Pub Date : 2022-01-01DOI: 10.2320/jinstmet.j2021053
Shun Hamashima, A. Nishimoto
{"title":"Thickening of S-Phase and Sα-Phase of Various Stainless Steels Treated by Low Temperature Plasma Nitriding Using Screen","authors":"Shun Hamashima, A. Nishimoto","doi":"10.2320/jinstmet.j2021053","DOIUrl":"https://doi.org/10.2320/jinstmet.j2021053","url":null,"abstract":"","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"102 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76097850","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}
Pub Date : 2022-01-01DOI: 10.2320/jinstmet.j2021041
M. Takeuchi, T. Yomogita, N. Kikuchi, K. Toyoki, S. Kobayashi, Y. Kotani, T. Nakamura, K. Hioki, S. Okamoto
A large step on the initial magnetization curve has been widely observed in Nd – Fe – B hot – deformed magnets. This behavior has been considered as that the fi rst – and latter – half parts of the initial magnetization curve correspond to the magnetization reversals of multi – and single – domain grains, respectively. In this study, the detailed magnetic domain structure of a Nd – Fe – B hot – deformed magnet has been studied for the initial magnetization and demagnetization processes by using a soft X – ray magnetic circular dichroism ( XMCD ) microscopy. The observed magnetization reversal behavior for the initial magnetization process is quite di ff erent from that previously considered. The multi – domain states move from grains to grains through the gradual displacement of domain wall passing through many grains, and then the massive domain wall displacement takes place. The latter part of domain wall displacement is similar with that found in the demagnetization process near the coercivity. Moreover, we found that there are several strong pinning sites which are identical for both the initial magnetization and the demagnetization processes. ［ doi:10.2320 / jinstmet.J2021041 ］ ( )
在Nd - Fe - B热变形磁体中，已广泛观察到初始磁化曲线上的一个大台阶。这种行为被认为是初始磁化曲线的前半部分和后半部分分别对应于多畴和单畴晶粒的磁化反转。本文利用软X射线圆二色性(XMCD)显微镜研究了Nd - Fe - B热变形磁体在初始磁化和退磁过程中的详细磁畴结构。观察到的初始磁化过程的磁化反转行为与先前考虑的完全不同。多畴态通过畴壁在多个晶粒间的逐渐位移，从一个晶粒向另一个晶粒移动，然后发生大规模的畴壁位移。畴壁位移的后半部分与矫顽力附近的退磁过程相似。此外，我们发现在初始磁化和退磁过程中存在几个相同的强钉钉位点。[doi:10.2320 / jinstmet.][2021041] ()
{"title":"Magnetic Domain Structure Observation for Initial Magnetization and Demagnetization Processes of a Nd-Fe-B Hot-Deformed Magnet Using Soft X-ray Magnetic Circular Dichroism Microscopy","authors":"M. Takeuchi, T. Yomogita, N. Kikuchi, K. Toyoki, S. Kobayashi, Y. Kotani, T. Nakamura, K. Hioki, S. Okamoto","doi":"10.2320/jinstmet.j2021041","DOIUrl":"https://doi.org/10.2320/jinstmet.j2021041","url":null,"abstract":"A large step on the initial magnetization curve has been widely observed in Nd – Fe – B hot – deformed magnets. This behavior has been considered as that the fi rst – and latter – half parts of the initial magnetization curve correspond to the magnetization reversals of multi – and single – domain grains, respectively. In this study, the detailed magnetic domain structure of a Nd – Fe – B hot – deformed magnet has been studied for the initial magnetization and demagnetization processes by using a soft X – ray magnetic circular dichroism ( XMCD ) microscopy. The observed magnetization reversal behavior for the initial magnetization process is quite di ff erent from that previously considered. The multi – domain states move from grains to grains through the gradual displacement of domain wall passing through many grains, and then the massive domain wall displacement takes place. The latter part of domain wall displacement is similar with that found in the demagnetization process near the coercivity. Moreover, we found that there are several strong pinning sites which are identical for both the initial magnetization and the demagnetization processes. ［ doi:10.2320 / jinstmet.J2021041 ］ ( )","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88413403","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}
Pub Date : 2022-01-01DOI: 10.2320/jinstmet.j2021047
H. Sato, Akito Tasaki, R. Fujita, N. Adachi, Y. Todaka, Yasuhiro Kobayashi
It is widely known that a steady–state grain size dss obtained by a plastic deformation varies with change in physical properties of a material, such as stacking fault energy ΓSFE, shear modulus G, flow stress σ and magnitude of Burgers vector b. In a previous study, a model has been proposed based on dislocation theory to describe the relationship between dss and physical properties. For pure metals, it has been reported that the variation of dss follows the model. For alloys, although the effect of the normalized stacking fault energy ΓSFE/Gb has been investigated, that of other physical properties such as σ has not been well considered. In this study, physical properties of the Ni–Fe alloys were controlled by changing Fe content, and effect of the physical properties on dss obtained by the High–pressure torsion (HPT) straining was investigated. dss of Ni–Fe alloys became finer with increasing Fe content. This study revealed that decrease in dss of Ni–Fe alloys follow the previous model, which suggested that not only ΓSFE/Gb but also normalized flow stress σ/G affects dss of Ni–Fe alloys. It is presumable that the decrease in ΓSFE/Gb suppresses the recovery of dislocations, and the decrease in inverse of σ/G enhances the introduction of dislocation, which leads to a finer dss in the Ni–Fe alloys. [doi:10.2320/jinstmet.J2021047]
{"title":"Effect of Fe Content on Steady-State Grain Size in Ni-Fe Alloys","authors":"H. Sato, Akito Tasaki, R. Fujita, N. Adachi, Y. Todaka, Yasuhiro Kobayashi","doi":"10.2320/jinstmet.j2021047","DOIUrl":"https://doi.org/10.2320/jinstmet.j2021047","url":null,"abstract":"It is widely known that a steady–state grain size dss obtained by a plastic deformation varies with change in physical properties of a material, such as stacking fault energy ΓSFE, shear modulus G, flow stress σ and magnitude of Burgers vector b. In a previous study, a model has been proposed based on dislocation theory to describe the relationship between dss and physical properties. For pure metals, it has been reported that the variation of dss follows the model. For alloys, although the effect of the normalized stacking fault energy ΓSFE/Gb has been investigated, that of other physical properties such as σ has not been well considered. In this study, physical properties of the Ni–Fe alloys were controlled by changing Fe content, and effect of the physical properties on dss obtained by the High–pressure torsion (HPT) straining was investigated. dss of Ni–Fe alloys became finer with increasing Fe content. This study revealed that decrease in dss of Ni–Fe alloys follow the previous model, which suggested that not only ΓSFE/Gb but also normalized flow stress σ/G affects dss of Ni–Fe alloys. It is presumable that the decrease in ΓSFE/Gb suppresses the recovery of dislocations, and the decrease in inverse of σ/G enhances the introduction of dislocation, which leads to a finer dss in the Ni–Fe alloys. [doi:10.2320/jinstmet.J2021047]","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89571636","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}
Pub Date : 2022-01-01DOI: 10.2320/jinstmet.j2021042
Takumi Fujioka, Y. Hangai, H. Mitsugi, K. Amagai
Porous aluminum is lightweight and has good shock absorption properties. Therefore, by joining thermoplastic resin, which has been widely used in recent years, to porous aluminum, it is possible to achieve both strength and weight reduction while providing shock absorption properties. In this study, bonding of porous aluminum and a polycarbonate plate was performed. The polycarbonate plate was pressed against the heated porous aluminum to bond them. From the tensile test of the bonded specimen, it was found that bonded specimen, which was bonded at 400 ℃ can achieve higher strength than that at 300 ℃ owing to the anchor e ff ect. The bonded specimen, which was bonded at 400 ℃ , exhibited fracture at the porous aluminum part, while the bonded specimen, which was bonded at 300 ℃ , exhibited fracture at the bonded surface.
{"title":"Press Bonding of Heated Porous Aluminum and Polycarbonate","authors":"Takumi Fujioka, Y. Hangai, H. Mitsugi, K. Amagai","doi":"10.2320/jinstmet.j2021042","DOIUrl":"https://doi.org/10.2320/jinstmet.j2021042","url":null,"abstract":"Porous aluminum is lightweight and has good shock absorption properties. Therefore, by joining thermoplastic resin, which has been widely used in recent years, to porous aluminum, it is possible to achieve both strength and weight reduction while providing shock absorption properties. In this study, bonding of porous aluminum and a polycarbonate plate was performed. The polycarbonate plate was pressed against the heated porous aluminum to bond them. From the tensile test of the bonded specimen, it was found that bonded specimen, which was bonded at 400 ℃ can achieve higher strength than that at 300 ℃ owing to the anchor e ff ect. The bonded specimen, which was bonded at 400 ℃ , exhibited fracture at the porous aluminum part, while the bonded specimen, which was bonded at 300 ℃ , exhibited fracture at the bonded surface.","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"129 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76730081","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}
Pub Date : 2022-01-01DOI: 10.2320/jinstmet.j2022015
H. Kato, H. Ikehata, S. Mitao, Hironori Aoyama, Kouji Tanaka, Tadashi Oshima
{"title":"Effects of Ni Content on Particle Size of Secondary Phase in Cu-Based Alloys with Liquid Immiscibility by Laser-Melting","authors":"H. Kato, H. Ikehata, S. Mitao, Hironori Aoyama, Kouji Tanaka, Tadashi Oshima","doi":"10.2320/jinstmet.j2022015","DOIUrl":"https://doi.org/10.2320/jinstmet.j2022015","url":null,"abstract":"","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86111723","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}
Pub Date : 2022-01-01DOI: 10.2320/jinstmet.j2022023
Daiki Harada, Y. Terada
{"title":"Precipitation of Fe2W Laves Phase in Fe-Ni-Based Alloy HR6W without Carbon","authors":"Daiki Harada, Y. Terada","doi":"10.2320/jinstmet.j2022023","DOIUrl":"https://doi.org/10.2320/jinstmet.j2022023","url":null,"abstract":"","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90535957","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}
Pub Date : 2022-01-01DOI: 10.2320/jinstmet.j2021054
Naohiro Kobayashi, M. Koyama, Misaho Yamamura, Tomohiko Hojo, E. Akiyama
{"title":"Cr Effects on the Local Plasticity Evolution and Fracture Behaviors of Ni-Cr Alloys Tensile-Tested under Hydrogen Charging","authors":"Naohiro Kobayashi, M. Koyama, Misaho Yamamura, Tomohiko Hojo, E. Akiyama","doi":"10.2320/jinstmet.j2021054","DOIUrl":"https://doi.org/10.2320/jinstmet.j2021054","url":null,"abstract":"","PeriodicalId":17322,"journal":{"name":"Journal of the Japan Institute of Metals and Materials","volume":"44 28","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91420465","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：