Pub Date : 2019-03-01DOI: 10.17706/ijmse.2019.7.1.10-19
Yoshiki Kurokawa, Dang-Trang Nguyen, K. Taguchi
{"title":"Nickel-Doped TiO2 Multilayer Thin Film for Enhancement of Photocatalytic Activity","authors":"Yoshiki Kurokawa, Dang-Trang Nguyen, K. Taguchi","doi":"10.17706/ijmse.2019.7.1.10-19","DOIUrl":"https://doi.org/10.17706/ijmse.2019.7.1.10-19","url":null,"abstract":"","PeriodicalId":14103,"journal":{"name":"International Journal of Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73130143","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 : 2018-06-01DOI: 10.17706/ijmse.2018.6.2.39-47
A. Zulfia, Deliana Ramdaniawati, D. Dhaneswara
Aluminium Matrix Composites (AMCs) reinforced with Al2O3 nano particles are widely used for high performance application such as aerospace because aluminium is light weight and alumina has good performance at high temperature. Alumina nano particles is added into molten Al with different volume fraction from 0.2 vf-% to 1.2 vf-% while Mg is used as an external dopant with 10 wt-% to promote wetting between aluminium and Al2O3. The Al alloy was then melted and Mg along with the reinforcement was blended inside the molten metal by stirrier with rotational speed of 500 rpm at 800oC for 2 minutes and degassing with Ar for 4 minutes to remove all of gas in molten Al. The molten composites then was casted into plate and tensile test sample molds. The effect of Al2O3 nano particles on mechanical properties and microstructure of composites was investigated. The optimum tensile strength, hardness and elongation of composite was achieved at additon of 0.2vf-% Al2O3np with the value of 220 MPa, 61 HRB and 5.48% respectivelly. Increasing hardness was caused by impedation of dislocation movements by nano-Al2O3 particles. It is found that the addition of more Al2O3np, the mechanical propeties decreased. The microstructure observations showed that the composites yield finer grains than the unreinforced alloy Addition of nano-Al2O3 particles also tend to form microporosity and agglomeration which would decrease the tensile strength of composites.
{"title":"he Role of Al2O3 Nanoparticles Addition on Characteristic of Al6061 Composite Produced by Stir Casting Process","authors":"A. Zulfia, Deliana Ramdaniawati, D. Dhaneswara","doi":"10.17706/ijmse.2018.6.2.39-47","DOIUrl":"https://doi.org/10.17706/ijmse.2018.6.2.39-47","url":null,"abstract":"Aluminium Matrix Composites (AMCs) reinforced with Al2O3 nano particles are widely used for high performance application such as aerospace because aluminium is light weight and alumina has good performance at high temperature. Alumina nano particles is added into molten Al with different volume fraction from 0.2 vf-% to 1.2 vf-% while Mg is used as an external dopant with 10 wt-% to promote wetting between aluminium and Al2O3. The Al alloy was then melted and Mg along with the reinforcement was blended inside the molten metal by stirrier with rotational speed of 500 rpm at 800oC for 2 minutes and degassing with Ar for 4 minutes to remove all of gas in molten Al. The molten composites then was casted into plate and tensile test sample molds. The effect of Al2O3 nano particles on mechanical properties and microstructure of composites was investigated. The optimum tensile strength, hardness and elongation of composite was achieved at additon of 0.2vf-% Al2O3np with the value of 220 MPa, 61 HRB and 5.48% respectivelly. Increasing hardness was caused by impedation of dislocation movements by nano-Al2O3 particles. It is found that the addition of more Al2O3np, the mechanical propeties decreased. The microstructure observations showed that the composites yield finer grains than the unreinforced alloy Addition of nano-Al2O3 particles also tend to form microporosity and agglomeration which would decrease the tensile strength of composites.","PeriodicalId":14103,"journal":{"name":"International Journal of Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86711958","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 : 2018-06-01DOI: 10.17706/ijmse.2018.6.2.56-66
R. George, R. ManojSamson, Keshav Ottoor, T. Geethapriyan
The EN19 steel alloy finds its application in the automotive industry like manufacturing gears, spindles, and shafts. In this paper, we aim to improve the strength and ductility of the EN19 steel alloy by tempering process. Generally, heat treatment is the method of exposing the specimen to high temperatures and cooling it, to bring a change in its physical and chemical properties. In this experiment, the process of annealing, normalizing and quenching followed by tempering were performed on the steel specimens. On heating the specimens to 9000C, and cooling it from slower to a faster rate, we were able to observe and compare the changes in the microstructure, hardness, tensile strength and impact strength of the specimens before and after the heat treatment. On studying the microstructures and grain analysis of the specimens after each heat treatment process, we were able to observe the difference in the composition of the constituents and understand how this affects the mechanical properties of the material. The quenchants used are oil, water and brine solution for quenching. Since the specimens become brittle on quenching, tempering is performed on the specimens to improve the toughness of the material. It is found that the strength of the specimen is improved by quenching and toughness is improved by tempering it. On comparing the values of toughness of the tempered specimens with that of the quenched specimens, it is found that the oil tempered specimen increases by 25%, water tempered specimen by 80% and brine tempered specimen by 75% from the oil quenched, water quenched and the brine quenched specimens respectively.
{"title":"The Effects of Heat Treatment on The Microstructure and Mechanical Properties of EN19 Steel Alloy","authors":"R. George, R. ManojSamson, Keshav Ottoor, T. Geethapriyan","doi":"10.17706/ijmse.2018.6.2.56-66","DOIUrl":"https://doi.org/10.17706/ijmse.2018.6.2.56-66","url":null,"abstract":"The EN19 steel alloy finds its application in the automotive industry like manufacturing gears, spindles, and shafts. In this paper, we aim to improve the strength and ductility of the EN19 steel alloy by tempering process. Generally, heat treatment is the method of exposing the specimen to high temperatures and cooling it, to bring a change in its physical and chemical properties. In this experiment, the process of annealing, normalizing and quenching followed by tempering were performed on the steel specimens. On heating the specimens to 9000C, and cooling it from slower to a faster rate, we were able to observe and compare the changes in the microstructure, hardness, tensile strength and impact strength of the specimens before and after the heat treatment. On studying the microstructures and grain analysis of the specimens after each heat treatment process, we were able to observe the difference in the composition of the constituents and understand how this affects the mechanical properties of the material. The quenchants used are oil, water and brine solution for quenching. Since the specimens become brittle on quenching, tempering is performed on the specimens to improve the toughness of the material. It is found that the strength of the specimen is improved by quenching and toughness is improved by tempering it. On comparing the values of toughness of the tempered specimens with that of the quenched specimens, it is found that the oil tempered specimen increases by 25%, water tempered specimen by 80% and brine tempered specimen by 75% from the oil quenched, water quenched and the brine quenched specimens respectively.","PeriodicalId":14103,"journal":{"name":"International Journal of Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79963248","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}
A. Kozlovskiy, S. Kauanova, N. Daniyeva, M. Kaikanov, A. Stepanov, V. Shamanin, M. Zdorovets, I. Vorobjev
We present the results of study of the influence of low-energy ion beam irradiation on the structure of the surface and hydrophobic properties of PET membranes. To perform it we characterized ultrastructure, filtering and mechanical properties of the pristine and irradiated samples. Irradiation with a low-energy C and H ions increases the hydrophobicity of membranes made from PET films, while a decrease in strength properties is insignificant.
{"title":"The Change in the Hydrophobic Properties of Track Membranes as a Result of Directional Modification By a Low-Energy Ion Beam","authors":"A. Kozlovskiy, S. Kauanova, N. Daniyeva, M. Kaikanov, A. Stepanov, V. Shamanin, M. Zdorovets, I. Vorobjev","doi":"10.17706/ijmse.2018.6.2","DOIUrl":"https://doi.org/10.17706/ijmse.2018.6.2","url":null,"abstract":"We present the results of study of the influence of low-energy ion beam irradiation on the structure of the surface and hydrophobic properties of PET membranes. To perform it we characterized ultrastructure, filtering and mechanical properties of the pristine and irradiated samples. Irradiation with a low-energy C and H ions increases the hydrophobicity of membranes made from PET films, while a decrease in strength properties is insignificant.","PeriodicalId":14103,"journal":{"name":"International Journal of Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90421540","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：