Park Tae Gyu, Lee Sang Hyun, Lee Bin, Cho Hye Mi, Choi Won Jung, Kim Bum Sung, Shin Kwang Seon, Kim Taek-Soo
In this study, precisely controlled large scale gas atomization process was applied to produce spherical and uniform shaped high entropy alloy powder. The gas atomization process was carried out to fabricate CoCrFeNiMn alloy, which was studied for high ductility and mechanical properties at low temperatures. It was confirmed that the mass scale, single phase, equiatomic, and high purity spherical high entropy alloy powder was produced by gas atomization process. The powder was sintered by spark plasma sintering process with various sintering conditions, and mechanical properties were characterized. Through this research, we have developed a mass production process of high quality and spherical high entropy alloy powder, and it is expected to expand applications of this high entropy alloy into fields such as powder injection molding and 3D printing for complex shaped components.
{"title":"Fabrication and Characterization of CoCrFeNiMn High Entropy Alloy Powder Processed by Gas Atomization","authors":"Park Tae Gyu, Lee Sang Hyun, Lee Bin, Cho Hye Mi, Choi Won Jung, Kim Bum Sung, Shin Kwang Seon, Kim Taek-Soo","doi":"10.24425/122442","DOIUrl":"https://doi.org/10.24425/122442","url":null,"abstract":"In this study, precisely controlled large scale gas atomization process was applied to produce spherical and uniform shaped high entropy alloy powder. The gas atomization process was carried out to fabricate CoCrFeNiMn alloy, which was studied for high ductility and mechanical properties at low temperatures. It was confirmed that the mass scale, single phase, equiatomic, and high purity spherical high entropy alloy powder was produced by gas atomization process. The powder was sintered by spark plasma sintering process with various sintering conditions, and mechanical properties were characterized. Through this research, we have developed a mass production process of high quality and spherical high entropy alloy powder, and it is expected to expand applications of this high entropy alloy into fields such as powder injection molding and 3D printing for complex shaped components.","PeriodicalId":8304,"journal":{"name":"Archives of Metallurgy and Materials","volume":"8 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135544678","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 : 2023-11-06DOI: 10.24425/amm.2024.147775
{"title":"147775","authors":"","doi":"10.24425/amm.2024.147775","DOIUrl":"https://doi.org/10.24425/amm.2024.147775","url":null,"abstract":"","PeriodicalId":8304,"journal":{"name":"Archives of Metallurgy and Materials","volume":"25 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135585620","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 : 2023-11-06DOI: 10.24425/amm.2023.145488
two single crystals with compositions Fe-Ni-co-Al-ta and Fe-Ni-co-Al-ta-B were selected and fabricated by Bridgman method. subsequently, ingots were homogenized, oriented and subjected to a two-step heat treatment process in order to obtain fine and coherent γ' precipitates. subsequently, superelastic cycling experiments were performed at 77 k. the next step included detailed microstructural characterization using transmission electron microscopy and high-energy synchrotron X-ray diffraction measurements together with Rietveld refinement. the results show that the number of fully reversible superelastic strains is very sensitive to the size of γ' precipitates. the smaller (3 nm) γ' precipitates ensured more superelastic response compared to material with larger γ' particles size (5 nm), in which the material did not receive its original shape after 10 cycles even after being heated.
{"title":"The Influence of γ' Precipitates on the Structural Stability of FeNiCoAlTa and FeNiCoAlTaB Single Crystals After Cyclic Superelastic Deformation","authors":"","doi":"10.24425/amm.2023.145488","DOIUrl":"https://doi.org/10.24425/amm.2023.145488","url":null,"abstract":"two single crystals with compositions Fe-Ni-co-Al-ta and Fe-Ni-co-Al-ta-B were selected and fabricated by Bridgman method. subsequently, ingots were homogenized, oriented and subjected to a two-step heat treatment process in order to obtain fine and coherent γ' precipitates. subsequently, superelastic cycling experiments were performed at 77 k. the next step included detailed microstructural characterization using transmission electron microscopy and high-energy synchrotron X-ray diffraction measurements together with Rietveld refinement. the results show that the number of fully reversible superelastic strains is very sensitive to the size of γ' precipitates. the smaller (3 nm) γ' precipitates ensured more superelastic response compared to material with larger γ' particles size (5 nm), in which the material did not receive its original shape after 10 cycles even after being heated.","PeriodicalId":8304,"journal":{"name":"Archives of Metallurgy and Materials","volume":"32 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135584148","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 : 2023-11-06DOI: 10.24425/amm.2023.145479
{"title":"Similarity Solution for Phase Change of Dilute Binary Isomorphous Alloy with Density Variation during Phase Change","authors":"","doi":"10.24425/amm.2023.145479","DOIUrl":"https://doi.org/10.24425/amm.2023.145479","url":null,"abstract":"","PeriodicalId":8304,"journal":{"name":"Archives of Metallurgy and Materials","volume":"31 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135584154","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 : 2023-11-06DOI: 10.24425/amm.2023.145462
in recent years, the production of galvanized sheet steels with organic coatings applied to its surfaces has considerably expanded. Phosphating of the zinc surfaces raises its roughness and surface tension, providing high adhesion of subsequent organic coatings and respectively, significant increasing of their protective properties. The paper presents the results obtained in the investigation of combined anti-corrosion coatings, including formation of phosphate films on galvanized steel surfaces followed by the application of three types of paint and varnish coatings. The indicators characterizing the phosphating preparation (density, ph, conductivity, acid capacity) as well as the thickness of the coatings were measured. The chemical composition of the phosphate films, their morphology and topography were determined by means of eDX and SeM, respectively. The adhesion, elasticity and impact toughness of the organic coatings, with and without phosphating treatment of the zinc surfaces were measured. The corrosion resistance of the combined coatings in a model sodium chloride solution was also determined.
{"title":"Combined 3-Components Phosphate and Organic Coatings on Zinc Surfaces","authors":"","doi":"10.24425/amm.2023.145462","DOIUrl":"https://doi.org/10.24425/amm.2023.145462","url":null,"abstract":"in recent years, the production of galvanized sheet steels with organic coatings applied to its surfaces has considerably expanded. Phosphating of the zinc surfaces raises its roughness and surface tension, providing high adhesion of subsequent organic coatings and respectively, significant increasing of their protective properties. The paper presents the results obtained in the investigation of combined anti-corrosion coatings, including formation of phosphate films on galvanized steel surfaces followed by the application of three types of paint and varnish coatings. The indicators characterizing the phosphating preparation (density, ph, conductivity, acid capacity) as well as the thickness of the coatings were measured. The chemical composition of the phosphate films, their morphology and topography were determined by means of eDX and SeM, respectively. The adhesion, elasticity and impact toughness of the organic coatings, with and without phosphating treatment of the zinc surfaces were measured. The corrosion resistance of the combined coatings in a model sodium chloride solution was also determined.","PeriodicalId":8304,"journal":{"name":"Archives of Metallurgy and Materials","volume":"30 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135584165","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 : 2023-11-06DOI: 10.24425/amm.2023.145468
Oil-in-water emulsion is thermodynamically unstable system that undergoes destabilization with time. The tripropylene glycol diacrylate (TPGda) monomer which can potentially to increase the crosslink density of polymer blends is unstable in water due to its low water solubility properties. however, the stability of TPGda emulsion could be improved by adding an adequate amount of surfactant. This study addresses the effect of different Tween 20 (surfactant) concentration on emulsion stability of TPGda. Model emulsion ranging between 0.1 wt% to 3 wt% of Tween 20 and a control were prepared using heavy duty homogenizer. The emulsion was characterised by FTir, microstructure analysis, phase separation observation and creaming index during storage time. Emulsion containing 0.4 wt% Tween 20 showed the longest stability at 24 hours and a creaming index of 0%, which is enough for an ideal emulsion. The FTir spectra displayed the interaction of TPGda and Tw-20, proving that the emulsion is fully mixed and stabilized. The results are further supported by optical microscopy, which observed no droplet aggregation and flocculation in the TPGda emulsion with the presence of 0.4 wt% of Tw-20 surfactant. This information about Tw-20 is beneficial, making it a promising surfactant for enhancing the emulsion stability of the TPGda emulsion.
{"title":"Study on The Emulsion Stability of Tripropylene Glycol Diacrylate in Water","authors":"","doi":"10.24425/amm.2023.145468","DOIUrl":"https://doi.org/10.24425/amm.2023.145468","url":null,"abstract":"Oil-in-water emulsion is thermodynamically unstable system that undergoes destabilization with time. The tripropylene glycol diacrylate (TPGda) monomer which can potentially to increase the crosslink density of polymer blends is unstable in water due to its low water solubility properties. however, the stability of TPGda emulsion could be improved by adding an adequate amount of surfactant. This study addresses the effect of different Tween 20 (surfactant) concentration on emulsion stability of TPGda. Model emulsion ranging between 0.1 wt% to 3 wt% of Tween 20 and a control were prepared using heavy duty homogenizer. The emulsion was characterised by FTir, microstructure analysis, phase separation observation and creaming index during storage time. Emulsion containing 0.4 wt% Tween 20 showed the longest stability at 24 hours and a creaming index of 0%, which is enough for an ideal emulsion. The FTir spectra displayed the interaction of TPGda and Tw-20, proving that the emulsion is fully mixed and stabilized. The results are further supported by optical microscopy, which observed no droplet aggregation and flocculation in the TPGda emulsion with the presence of 0.4 wt% of Tw-20 surfactant. This information about Tw-20 is beneficial, making it a promising surfactant for enhancing the emulsion stability of the TPGda emulsion.","PeriodicalId":8304,"journal":{"name":"Archives of Metallurgy and Materials","volume":"31 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135584159","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 : 2023-11-06DOI: 10.24425/amm.2023.145457
{"title":"Microstructure and Mechanical Properties of Stainless Steel/Aluminum Multilayer Composites by One-Step Explosive Welding","authors":"","doi":"10.24425/amm.2023.145457","DOIUrl":"https://doi.org/10.24425/amm.2023.145457","url":null,"abstract":"","PeriodicalId":8304,"journal":{"name":"Archives of Metallurgy and Materials","volume":"30 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135584174","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 : 2023-11-06DOI: 10.24425/amm.2019.131099
{"title":"Evaluation of Durability-Related Field Inspection Data from Concrete Bridges Under Service","authors":"","doi":"10.24425/amm.2019.131099","DOIUrl":"https://doi.org/10.24425/amm.2019.131099","url":null,"abstract":"","PeriodicalId":8304,"journal":{"name":"Archives of Metallurgy and Materials","volume":"4 2‐3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135544647","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 : 2023-11-06DOI: 10.24425/amm.2023.145481
{"title":"PAN-Based Carbon Fibers Deposition on NiTi Surface","authors":"","doi":"10.24425/amm.2023.145481","DOIUrl":"https://doi.org/10.24425/amm.2023.145481","url":null,"abstract":"","PeriodicalId":8304,"journal":{"name":"Archives of Metallurgy and Materials","volume":"32 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135584146","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 : 2023-11-06DOI: 10.24425/amm.2023.145493
{"title":"Investigation of Mechanical Properties of Accelerated Cooled and Self-Tempered H-Type Structural Sections","authors":"","doi":"10.24425/amm.2023.145493","DOIUrl":"https://doi.org/10.24425/amm.2023.145493","url":null,"abstract":"","PeriodicalId":8304,"journal":{"name":"Archives of Metallurgy and Materials","volume":"31 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135584152","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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