Pub Date : 2023-04-25DOI: 10.15406/mseij.2023.07.00205
Atef M. F. Mohammed, Inas A. Saleh
Asphalt is a black, thermoplastic, hydrocarbon material extracted from crude oil and widely used in road construction all over the world. In order to meet the requirements of construction technology, asphalt always needs to be heated to flow state in the process of mixing and paving, during which a large amount of asphalt fume is released. Asphalt fume is a complex mixture of inorganic compound gases, volatile organic compounds and particulate matter, which poses a serious threat to the natural environment and the health of practitioners. This review presents HMA and WMA constituents and the potential health effects of criteria and Hazardous pollutants generated from asphalt pavement construction. Hot mix asphalt (HMA) and warm mix asphalt (WMA)are a major construction materials used for highway roads, building roads, airport runways, parking, and other pavement repairs in the worldwide. During HMA construction, a considerable number of volatile organic compounds (VOCs) are generated during asphalt pavement construction, and present negative effects on workers health. Accurate identification, quantification and measurement of emissions during HMA and WMA paving operations were used to identify and quantify VOCs, SVOCs, hazardous air pollutants (HAPs) and polycyclic aromatic hydrocarbons (PAHs) in asphalt fumes during production and paving activities.
{"title":"A review of environmental emissions from asphalt plants and paving","authors":"Atef M. F. Mohammed, Inas A. Saleh","doi":"10.15406/mseij.2023.07.00205","DOIUrl":"https://doi.org/10.15406/mseij.2023.07.00205","url":null,"abstract":"Asphalt is a black, thermoplastic, hydrocarbon material extracted from crude oil and widely used in road construction all over the world. In order to meet the requirements of construction technology, asphalt always needs to be heated to flow state in the process of mixing and paving, during which a large amount of asphalt fume is released. Asphalt fume is a complex mixture of inorganic compound gases, volatile organic compounds and particulate matter, which poses a serious threat to the natural environment and the health of practitioners. This review presents HMA and WMA constituents and the potential health effects of criteria and Hazardous pollutants generated from asphalt pavement construction. Hot mix asphalt (HMA) and warm mix asphalt (WMA)are a major construction materials used for highway roads, building roads, airport runways, parking, and other pavement repairs in the worldwide. During HMA construction, a considerable number of volatile organic compounds (VOCs) are generated during asphalt pavement construction, and present negative effects on workers health. Accurate identification, quantification and measurement of emissions during HMA and WMA paving operations were used to identify and quantify VOCs, SVOCs, hazardous air pollutants (HAPs) and polycyclic aromatic hydrocarbons (PAHs) in asphalt fumes during production and paving activities.","PeriodicalId":435904,"journal":{"name":"Material Science & Engineering International Journal","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116359358","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 : 2023-04-25DOI: 10.15406/mseij.2023.07.00206
I. M. Osman, A. Marouf
In this research, we investigate the effect of laser texturing on the photo-electrical properties of the polycrystalline silicon solar cell. Laser surface texturing technique was used to achieve the texturing results, which based on the interaction between pulsed CO2 laser (10.6μm) and polycrystalline silicon used for solar cells. Four of photovoltaic solar cells have been textured in two dimensions in different ranges (1 cm x 1cm and 2 cm x 2 cm) with different line spacing. Solar cells with laser-modified surface were characterized by SEM as well as photo-electrically before and after texturing process. The obtained results showed that laser surface texturing with small grooves spacing, results in increasing of the melted silicon surface area which enhance the silicon electrical properties. Furthermore, it increases the optical path length inside the solar cell which enhances light trapping.
{"title":"mpact of laser surface modification on polycrystalline silicon photovoltaic cell by means of CO2 laser","authors":"I. M. Osman, A. Marouf","doi":"10.15406/mseij.2023.07.00206","DOIUrl":"https://doi.org/10.15406/mseij.2023.07.00206","url":null,"abstract":"In this research, we investigate the effect of laser texturing on the photo-electrical properties of the polycrystalline silicon solar cell. Laser surface texturing technique was used to achieve the texturing results, which based on the interaction between pulsed CO2 laser (10.6μm) and polycrystalline silicon used for solar cells. Four of photovoltaic solar cells have been textured in two dimensions in different ranges (1 cm x 1cm and 2 cm x 2 cm) with different line spacing. Solar cells with laser-modified surface were characterized by SEM as well as photo-electrically before and after texturing process. The obtained results showed that laser surface texturing with small grooves spacing, results in increasing of the melted silicon surface area which enhance the silicon electrical properties. Furthermore, it increases the optical path length inside the solar cell which enhances light trapping.","PeriodicalId":435904,"journal":{"name":"Material Science & Engineering International Journal","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114466596","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 : 2023-04-14DOI: 10.15406/mseij.2023.07.00204
NakhutsriShvili I, B. G, B. K
The temperature dependences of the electronic quality factor and universal electrical conductivity of the n-type SixGe1-x alloy, as well as the dependence of the Seebeck coefficient on the specific and universal electrical conductivities are studied. Based on the measured thermoelectric parameters (Seebeck and thermal conductivity coefficients, specific resistance) the values of thermoelectric efficiency Z are calculated. The temperature dependences of universal electrical conductivity shows that the experimental points form almost a single set. This is due to the fact that changes of σ and B_E compensate each other. And, in general, the electronic quality factor BE performs scaling of thermoelectric quantities. The temperature dependences of thermoelectric efficiency shown that all SixGe1-x samples have a fairly high efficiency (≥7∙10-4 grad-1), the maximum of which is reached at about 700℃. The studied alloy were used as an element of a monolithic thermoelectric module.
{"title":"On the thermoelectric alloy SixGe1-x","authors":"NakhutsriShvili I, B. G, B. K","doi":"10.15406/mseij.2023.07.00204","DOIUrl":"https://doi.org/10.15406/mseij.2023.07.00204","url":null,"abstract":"The temperature dependences of the electronic quality factor and universal electrical conductivity of the n-type SixGe1-x alloy, as well as the dependence of the Seebeck coefficient on the specific and universal electrical conductivities are studied. Based on the measured thermoelectric parameters (Seebeck and thermal conductivity coefficients, specific resistance) the values of thermoelectric efficiency Z are calculated. The temperature dependences of universal electrical conductivity shows that the experimental points form almost a single set. This is due to the fact that changes of σ and B_E compensate each other. And, in general, the electronic quality factor BE performs scaling of thermoelectric quantities. The temperature dependences of thermoelectric efficiency shown that all SixGe1-x samples have a fairly high efficiency (≥7∙10-4 grad-1), the maximum of which is reached at about 700℃. The studied alloy were used as an element of a monolithic thermoelectric module.","PeriodicalId":435904,"journal":{"name":"Material Science & Engineering International Journal","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115303508","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 : 2023-04-13DOI: 10.15406/mseij.2023.07.00203
Samaila B, A. Ah, Yahaya Mn, Abubakar N
The effects of non-ionizing electromagnetic radiation from cellular base station exposure on human health are discussed in this review. Because of technological development, electromagnetic emissions are present at high levels in human existence. Due to the health risks linked with exposure to electromagnetic radiation (EMR), its effects are known. The systematic review work was done to identify measured values of non-ionizing radiation (such as power density and electric and magnetic fields) emitted by phones and GSM base stations, along with any potential biological consequences connected with the measured values. In the literature, all measurements of power density, electric fields, and magnetic fields were made using various instruments over a variety of base station distances and times. The findings from the literature showed that the non-ionizing electromagnetic radiation's power density, electric field, and magnetic field varied with distance from the tower and were highest at the closest distances. The findings also demonstrate that, in some situations, home exposure levels to base station-emitted non-ionizing electromagnetic radiation are within the limit. In some instances, however, the situation varies, and persons living close to base stations experience health effects from high levels of non-ionizing electromagnetic field exposure. The biological effects of non-ionizing electromagnetic radiation exposure in homes are summarized in this article. Numerous studies to date have established the dangers of mobile phone base station radiation to people and wildlife. The negative biological effects of exposure to non-ionizing electromagnetic radiation were compiled from numerous articles. Residents who are exposed to higher levels of non-ionizing electromagnetic radiation at home are more likely to experience symptoms like fatigue, nausea, disturbed sleep, discomfort, headache, memory loss, skin problems, visual disturbances, hearing problems, dizziness, muscle pain, DNA damage, and infertility. Some mobile base stations are situated quite close to homes and commercial buildings, putting individuals at risk from the base stations' electromagnetic radiation. Depending on the infrastructure impediment, such as interior obstructions or buildings, the emf changed from location to location. As a result, cellular mobile towers shouldn't be placed closer than 200 meters from residential structures.
{"title":"Residential exposure to non-ionizing electromagnetic radiation from mobile base stations: a systematic review on biological effects assessment","authors":"Samaila B, A. Ah, Yahaya Mn, Abubakar N","doi":"10.15406/mseij.2023.07.00203","DOIUrl":"https://doi.org/10.15406/mseij.2023.07.00203","url":null,"abstract":"The effects of non-ionizing electromagnetic radiation from cellular base station exposure on human health are discussed in this review. Because of technological development, electromagnetic emissions are present at high levels in human existence. Due to the health risks linked with exposure to electromagnetic radiation (EMR), its effects are known. The systematic review work was done to identify measured values of non-ionizing radiation (such as power density and electric and magnetic fields) emitted by phones and GSM base stations, along with any potential biological consequences connected with the measured values. In the literature, all measurements of power density, electric fields, and magnetic fields were made using various instruments over a variety of base station distances and times. The findings from the literature showed that the non-ionizing electromagnetic radiation's power density, electric field, and magnetic field varied with distance from the tower and were highest at the closest distances. The findings also demonstrate that, in some situations, home exposure levels to base station-emitted non-ionizing electromagnetic radiation are within the limit. In some instances, however, the situation varies, and persons living close to base stations experience health effects from high levels of non-ionizing electromagnetic field exposure. The biological effects of non-ionizing electromagnetic radiation exposure in homes are summarized in this article. Numerous studies to date have established the dangers of mobile phone base station radiation to people and wildlife. The negative biological effects of exposure to non-ionizing electromagnetic radiation were compiled from numerous articles. Residents who are exposed to higher levels of non-ionizing electromagnetic radiation at home are more likely to experience symptoms like fatigue, nausea, disturbed sleep, discomfort, headache, memory loss, skin problems, visual disturbances, hearing problems, dizziness, muscle pain, DNA damage, and infertility. Some mobile base stations are situated quite close to homes and commercial buildings, putting individuals at risk from the base stations' electromagnetic radiation. Depending on the infrastructure impediment, such as interior obstructions or buildings, the emf changed from location to location. As a result, cellular mobile towers shouldn't be placed closer than 200 meters from residential structures.","PeriodicalId":435904,"journal":{"name":"Material Science & Engineering International Journal","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124081373","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 : 2023-04-12DOI: 10.15406/mseij.2023.07.00202
Ludmila Ciugureanu, Ion Botnarenco
The measures, which protect land resources, including agricultural land whose main object is soil, is a highly imported problem worldwide. In un committees and meetings, a topic of discussion is the issue of sustainable use and protection of land resources. Agrarian policy in the EU is also oriented towards the sustainable use of natural resources, the protection of land resources, soil resources, etc. The Agrarian policy in the Republic of Moldova is the sustainable use and protection of limited land resources. Since 1992, with the implementation of the land reform (transmission of agricultural land to private ownership), an important process in the field of territory organization has been neglected, namely the sustainable use of agricultural land, as well as the application of measures for the organization of the territory.
{"title":"The role of the territory organization process in the sustainable use of functioning resources","authors":"Ludmila Ciugureanu, Ion Botnarenco","doi":"10.15406/mseij.2023.07.00202","DOIUrl":"https://doi.org/10.15406/mseij.2023.07.00202","url":null,"abstract":"The measures, which protect land resources, including agricultural land whose main object is soil, is a highly imported problem worldwide. In un committees and meetings, a topic of discussion is the issue of sustainable use and protection of land resources. Agrarian policy in the EU is also oriented towards the sustainable use of natural resources, the protection of land resources, soil resources, etc. The Agrarian policy in the Republic of Moldova is the sustainable use and protection of limited land resources. Since 1992, with the implementation of the land reform (transmission of agricultural land to private ownership), an important process in the field of territory organization has been neglected, namely the sustainable use of agricultural land, as well as the application of measures for the organization of the territory.","PeriodicalId":435904,"journal":{"name":"Material Science & Engineering International Journal","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126298502","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 : 2023-04-03DOI: 10.15406/mseij.2023.07.00201
S. Guzii
{"title":"Peculiarities of dielectrometry in the shortwave and subterahertz bands","authors":"S. Guzii","doi":"10.15406/mseij.2023.07.00201","DOIUrl":"https://doi.org/10.15406/mseij.2023.07.00201","url":null,"abstract":"","PeriodicalId":435904,"journal":{"name":"Material Science & Engineering International Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130639591","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 : 2023-03-30DOI: 10.15406/mseij.2023.07.00200
Nwaokezi Ee, Eluozo Sn, U. C.
In this paper, modeling and simulation techniques with experimental setup values were used to investigate the effects of foundation settlement on the heterogeneity of moisture content, formation characteristics, and ground water. The study was conducted at Obirikom in Rivers State's Ogba Egbema Local Government Area; the samples were subjected to the following laboratory tests: particle size analysis, Atterberg limit tests, compaction test, natural moisture content test, specific gravity, and consolidation test, which revealed that the soil was predominantly clay deposited. Modeling and simulation were used to predict how different soil conditions affected the settlement of a foundation. The study observed heterogeneous soil deposition as it reflected on soil properties, and the study on foundation settlement influence explained the heterogeneous impacts on moisture. Permeability, plastic and liquid limits, as well as other soil properties such as moisture content, water content, and dry density, was investigated. Significant parameters were observed in the study, such as dry density, which is directly proportional to plasticity as settlement increases in moisture until optimum moisture content is observed at the level where settlement decreases to a minimum. The moisture content of the settlement increased while exceeding the optimum moisture content.
{"title":"Modeling and simulation of heterogeneous moisture content influence on foundation settlement in silt clay","authors":"Nwaokezi Ee, Eluozo Sn, U. C.","doi":"10.15406/mseij.2023.07.00200","DOIUrl":"https://doi.org/10.15406/mseij.2023.07.00200","url":null,"abstract":"In this paper, modeling and simulation techniques with experimental setup values were used to investigate the effects of foundation settlement on the heterogeneity of moisture content, formation characteristics, and ground water. The study was conducted at Obirikom in Rivers State's Ogba Egbema Local Government Area; the samples were subjected to the following laboratory tests: particle size analysis, Atterberg limit tests, compaction test, natural moisture content test, specific gravity, and consolidation test, which revealed that the soil was predominantly clay deposited. Modeling and simulation were used to predict how different soil conditions affected the settlement of a foundation. The study observed heterogeneous soil deposition as it reflected on soil properties, and the study on foundation settlement influence explained the heterogeneous impacts on moisture. Permeability, plastic and liquid limits, as well as other soil properties such as moisture content, water content, and dry density, was investigated. Significant parameters were observed in the study, such as dry density, which is directly proportional to plasticity as settlement increases in moisture until optimum moisture content is observed at the level where settlement decreases to a minimum. The moisture content of the settlement increased while exceeding the optimum moisture content.","PeriodicalId":435904,"journal":{"name":"Material Science & Engineering International Journal","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125265818","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 : 2023-03-20DOI: 10.15406/mseij.2023.07.00199
Patrick Ajwang
{"title":"Understanding evapotranspiration is key to lessening the climate change angst","authors":"Patrick Ajwang ","doi":"10.15406/mseij.2023.07.00199","DOIUrl":"https://doi.org/10.15406/mseij.2023.07.00199","url":null,"abstract":"","PeriodicalId":435904,"journal":{"name":"Material Science & Engineering International Journal","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122030662","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 : 2023-03-14DOI: 10.15406/mseij.2023.07.00198
O. Potapenko, K. Vavilon, V. Zinin, H. Potapenko, Zhang Qian, Shengwen Zhong
The "pompon" graphene was obtained by the new modified controlled detonation gas synthesis tested as an anode of LIBs. Processing of Raman spectra by changing the position of the G-band shows the presence of a mixture of 2, 3 and 4-layer graphene structures. The results of the surface area measurement by the BET method have been shown the limited availability of the "pompons" for the penetration of lithium ions between its layers. Subsequent thermomechanical activation leads to partial "delamination” of the pompon and the production of both separate and 2-layer sheets of graphene, which is reflected in a sharp increase in its specific surface area. The specific capacity of graphene, as an anode of LIBs, increases in the range M0 < M20 < M40 and reaches of 500 mAh•g-1 at a current density of 37.2 mA•g-1 for the best M40 sample. The obtained values of specific capacity are 1.5 times higher than similar values for graphite-based anodes.
{"title":"“Pompon” graphene as a new promising anode for LIBs","authors":"O. Potapenko, K. Vavilon, V. Zinin, H. Potapenko, Zhang Qian, Shengwen Zhong","doi":"10.15406/mseij.2023.07.00198","DOIUrl":"https://doi.org/10.15406/mseij.2023.07.00198","url":null,"abstract":"The \"pompon\" graphene was obtained by the new modified controlled detonation gas synthesis tested as an anode of LIBs. Processing of Raman spectra by changing the position of the G-band shows the presence of a mixture of 2, 3 and 4-layer graphene structures. The results of the surface area measurement by the BET method have been shown the limited availability of the \"pompons\" for the penetration of lithium ions between its layers. Subsequent thermomechanical activation leads to partial \"delamination” of the pompon and the production of both separate and 2-layer sheets of graphene, which is reflected in a sharp increase in its specific surface area. The specific capacity of graphene, as an anode of LIBs, increases in the range M0 < M20 < M40 and reaches of 500 mAh•g-1 at a current density of 37.2 mA•g-1 for the best M40 sample. The obtained values of specific capacity are 1.5 times higher than similar values for graphite-based anodes.","PeriodicalId":435904,"journal":{"name":"Material Science & Engineering International Journal","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117309615","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 : 2023-02-20DOI: 10.15406/mseij.2022.06.00197
Jinwu Kang, YuanHang Huangb, Hai Yub
Laser powder bed fusion method is popularly applied in the additive manufacturing of metal parts. The void defect and microstructure are the main factors which determine their mechanical properties. However, the characterization of microstructure and cavities is two dimensional, which is hard to show the spatial profile. In this paper, in order to explore the microstructure and defects in three dimensions, the combined continuously slicing and microstructure observation was used to investigate the microstructure of an Inconel 718 sample. The sample was sliced 468 layers with thickness of 1 µm by xenon ion beam, a 142.8 µm* 107 µm* 46.8 µm microstructure cube was reconstructed. From the 3D model, the melt pool, cavity, pore and grains and their orientations were analyzed. The results provide spatial features of its microstructure. The equi-axed grains are among the coarse column grains, and some are the original grains of insufficiently melt or totally unmelt powder particles. The results tell the difference of the two kinds of voids, i.e., cavity and pore.
{"title":"3D characterization of the microstructure of LPBF- fabricated Inconel 718 alloy","authors":"Jinwu Kang, YuanHang Huangb, Hai Yub","doi":"10.15406/mseij.2022.06.00197","DOIUrl":"https://doi.org/10.15406/mseij.2022.06.00197","url":null,"abstract":"Laser powder bed fusion method is popularly applied in the additive manufacturing of metal parts. The void defect and microstructure are the main factors which determine their mechanical properties. However, the characterization of microstructure and cavities is two dimensional, which is hard to show the spatial profile. In this paper, in order to explore the microstructure and defects in three dimensions, the combined continuously slicing and microstructure observation was used to investigate the microstructure of an Inconel 718 sample. The sample was sliced 468 layers with thickness of 1 µm by xenon ion beam, a 142.8 µm* 107 µm* 46.8 µm microstructure cube was reconstructed. From the 3D model, the melt pool, cavity, pore and grains and their orientations were analyzed. The results provide spatial features of its microstructure. The equi-axed grains are among the coarse column grains, and some are the original grains of insufficiently melt or totally unmelt powder particles. The results tell the difference of the two kinds of voids, i.e., cavity and pore.","PeriodicalId":435904,"journal":{"name":"Material Science & Engineering International Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128937256","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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