Kensuke Kurihara, I. Lobzenko, T. Tsuru, A. Serizawa
{"title":"Interaction between solute atoms and vacancies in Al-Mg-X (X＝Si, Ge) alloys","authors":"Kensuke Kurihara, I. Lobzenko, T. Tsuru, A. Serizawa","doi":"10.2464/jilm.72.427","DOIUrl":"https://doi.org/10.2464/jilm.72.427","url":null,"abstract":"","PeriodicalId":39954,"journal":{"name":"Keikinzoku/Journal of Japan Institute of Light Metals","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90999632","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}
Ryoichi Oikawa, K. Shimizu, Y. Kamada, H. Toda, H. Fujihara, M. Uesugi, A. Takeuchi
{"title":"Influence of hydrogen on the damage behavior of IMC particles in Al-Zn-Mg-Cu alloys","authors":"Ryoichi Oikawa, K. Shimizu, Y. Kamada, H. Toda, H. Fujihara, M. Uesugi, A. Takeuchi","doi":"10.2464/jilm.72.411","DOIUrl":"https://doi.org/10.2464/jilm.72.411","url":null,"abstract":"","PeriodicalId":39954,"journal":{"name":"Keikinzoku/Journal of Japan Institute of Light Metals","volume":"39 2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89479941","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":"Effects of multi-directional forging on texture and hardness in A5052 aluminum alloy","authors":"K. Kashihara, Daiki Ogura","doi":"10.2464/jilm.72.420","DOIUrl":"https://doi.org/10.2464/jilm.72.420","url":null,"abstract":"","PeriodicalId":39954,"journal":{"name":"Keikinzoku/Journal of Japan Institute of Light Metals","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85305490","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":"Stress corrosion cracking of aluminum alloys from the viewpoint of intergranular corrosion sensitivity and hydrogen embrittlement","authors":"T. Minoda, Yoichiro Betsuki","doi":"10.2464/jilm.72.431","DOIUrl":"https://doi.org/10.2464/jilm.72.431","url":null,"abstract":"","PeriodicalId":39954,"journal":{"name":"Keikinzoku/Journal of Japan Institute of Light Metals","volume":"99 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80612217","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":"Modeling of yield surfaces for A5052 aluminum alloy sheets with different tempers by simplified identification method and its experimental validation","authors":"Yuta Saito, H. Takizawa","doi":"10.2464/jilm.72.403","DOIUrl":"https://doi.org/10.2464/jilm.72.403","url":null,"abstract":"","PeriodicalId":39954,"journal":{"name":"Keikinzoku/Journal of Japan Institute of Light Metals","volume":"78 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79005734","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":"Microstructure and cell structure determining mechanical properties of additively manufactured porous metals","authors":"K. Kitazono","doi":"10.2464/jilm.72.350","DOIUrl":"https://doi.org/10.2464/jilm.72.350","url":null,"abstract":"","PeriodicalId":39954,"journal":{"name":"Keikinzoku/Journal of Japan Institute of Light Metals","volume":"119 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77480120","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}
In order to avoid the formation of defects in additive manufacturing (AM) by powder bed fusion (PBF) process, it is crucial to understand the relationship between the quality of powder bed and a powder spreading process. In this study, the in fl uences of conditions of powder raking process on the densities and homogeneity of powder bed have been examined by computer simulation using Discrete Element Method (DEM) and experiment of powder bed formation using a blade-type spreader for Ti 6Al 4V powder by way of example. The results were analyzed with a special focus on the e ff ects of the relative size of powder particles with respect to the gap between the blade and the build platform. It has been clearly shown that the gap needs to be larger than the upper bound of the distribution of powder particles diameter to obtain a high-density powder bed. The DEM simulation indicated that the blade can sweep even powder particles that are not in direct contact with the blade when the powder particles are in a close-packed tetragonal con fi guration. This is the probable reason for the experimental fact that powder particles smaller than half of the gap are suitable for PBF. [doi:10.2320 / matertrans.MT-MLA2022010]
{"title":"Raking process for Powder Bed Fusion of Ti-6Al-4V alloy Powder Analyzed by Discrete Element Method","authors":"M. Okugawa, Y. Isono, Yuichiro Koizumi, T. Nakano","doi":"10.2464/jilm.72.291","DOIUrl":"https://doi.org/10.2464/jilm.72.291","url":null,"abstract":"In order to avoid the formation of defects in additive manufacturing (AM) by powder bed fusion (PBF) process, it is crucial to understand the relationship between the quality of powder bed and a powder spreading process. In this study, the in fl uences of conditions of powder raking process on the densities and homogeneity of powder bed have been examined by computer simulation using Discrete Element Method (DEM) and experiment of powder bed formation using a blade-type spreader for Ti 6Al 4V powder by way of example. The results were analyzed with a special focus on the e ff ects of the relative size of powder particles with respect to the gap between the blade and the build platform. It has been clearly shown that the gap needs to be larger than the upper bound of the distribution of powder particles diameter to obtain a high-density powder bed. The DEM simulation indicated that the blade can sweep even powder particles that are not in direct contact with the blade when the powder particles are in a close-packed tetragonal con fi guration. This is the probable reason for the experimental fact that powder particles smaller than half of the gap are suitable for PBF. [doi:10.2320 / matertrans.MT-MLA2022010]","PeriodicalId":39954,"journal":{"name":"Keikinzoku/Journal of Japan Institute of Light Metals","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88526567","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}
Kohei Yamakawa, Huakang Bian, K. Aoyagi, K. Yamanaka, A. Chiba
The AlSi10Mg alloy was manufactured via the powder bed fusion-electron beam (PBF-EB) melting technology. The present study mainly focused on the influence of post heat treatment on microstructure and mechanical proper -ties. The peak hardness was obtained under optimal aging conditions, such as 240°C for 0.1 ks, 200°C for 1.0 ks, and 160°C for 43.2 ks, respectively. The nanoscale and fine Si phase reprecipitated during aging process, giving rise to the strengthening of as-built AlSi10Mg alloy. The tensile strength increased to>300 MPa while the tensile elon-gation remained approximately 15%. The present study provides a potential method to regulate the microstructure of light-weight alloy in future.
{"title":"Microstructure evolution during T6 heat treatment in an additive manufactured AlSi10Mg alloy using powder bed fusion-electron beam","authors":"Kohei Yamakawa, Huakang Bian, K. Aoyagi, K. Yamanaka, A. Chiba","doi":"10.2464/jilm.72.321","DOIUrl":"https://doi.org/10.2464/jilm.72.321","url":null,"abstract":"The AlSi10Mg alloy was manufactured via the powder bed fusion-electron beam (PBF-EB) melting technology. The present study mainly focused on the influence of post heat treatment on microstructure and mechanical proper -ties. The peak hardness was obtained under optimal aging conditions, such as 240°C for 0.1 ks, 200°C for 1.0 ks, and 160°C for 43.2 ks, respectively. The nanoscale and fine Si phase reprecipitated during aging process, giving rise to the strengthening of as-built AlSi10Mg alloy. The tensile strength increased to>300 MPa while the tensile elon-gation remained approximately 15%. The present study provides a potential method to regulate the microstructure of light-weight alloy in future.","PeriodicalId":39954,"journal":{"name":"Keikinzoku/Journal of Japan Institute of Light Metals","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80568057","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":"Microstructural control and functional enhancement of light metal materials via metal additive manufacturing","authors":"Takuya Ishimoto, T. Nakano","doi":"10.2464/jilm.72.327","DOIUrl":"https://doi.org/10.2464/jilm.72.327","url":null,"abstract":"","PeriodicalId":39954,"journal":{"name":"Keikinzoku/Journal of Japan Institute of Light Metals","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81212870","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}
Ryosuke Ozasa, Aira Matsugaki, Takuya Ishimoto, T. Nakano
{"title":"Research and development of titanium-containing biomedical high entropy alloys (BioHEAs) utilizing rapid solidification via laser-powder bed fusion","authors":"Ryosuke Ozasa, Aira Matsugaki, Takuya Ishimoto, T. Nakano","doi":"10.2464/jilm.72.334","DOIUrl":"https://doi.org/10.2464/jilm.72.334","url":null,"abstract":"","PeriodicalId":39954,"journal":{"name":"Keikinzoku/Journal of Japan Institute of Light Metals","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85525082","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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