AIMS Materials Science最新文献_第10页

Experimental evaluation of additively deposited functionally graded material samples-microscopic and spectroscopic analysis of SS-316L/Co-Cr-Mo alloy 添加沉积功能梯度材料样品的实验评价——SS-316L/Co-Cr-Mo合金的显微和光谱分析

IF 1.8

AIMS Materials Science Pub Date : 2022-01-01 DOI: 10.3934/matersci.2022040

Y. P. Reddy, K. L. Narayana, M. K. Mallik, C. Paul, C. Singh

引用次数: 1

Investigation of ZnO doping on LaFeO3/Fe2O3 prepared from yarosite mineral extraction for ethanol gas sensor applications 乙醇气体传感器用黄矾矿萃取法制备LaFeO3/Fe2O3的ZnO掺杂研究

IF 1.8

AIMS Materials Science Pub Date : 2022-01-01 DOI: 10.3934/matersci.2022007

E. Suhendi, A. E. Putri, Muhamad Taufik Ulhakim, A. Setiawan, Syarif Dani Gustaman

{"title":"Investigation of ZnO doping on LaFeO3/Fe2O3 prepared from yarosite mineral extraction for ethanol gas sensor applications","authors":"E. Suhendi, A. E. Putri, Muhamad Taufik Ulhakim, A. Setiawan, Syarif Dani Gustaman","doi":"10.3934/matersci.2022007","DOIUrl":"https://doi.org/10.3934/matersci.2022007","url":null,"abstract":"In this study, we used a natural resource, yarosite minerals, as a Fe2O3 precursor. Yarosite minerals were used for the synthesis of LaFeO3/Fe2O3 doped with ZnO via a co-precipitation method using ammonium hydroxide, which produced a light brown powder. Then, an ethanol gas sensor was prepared using a screen-printing technique and characterized using gas chamber tools at 100,200, and 300 ppm of ethanol gas to investigate the sensor's performance. Several factors that substantiate electrical properties such as crystal and morphological structures were also studied using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM), respectively. The crystallite size decreased from about 61.4 nm to 28.8 nm after 0.5 mol% ZnO was added. The SEM characterization images informed that the modified LaFeO3 was relatively the same but not uniform. Lastly, the sensor's electrical properties exhibited a high response of about 257% to 309% at an operating temperature that decreased from 205 ℃ to 180 ℃. This finding showed that these natural resources have the potential to be applied in the development of ethanol gas sensors in the future. Hence, yarosite minerals can be considered a good natural resource that can be further explored to produce an ethanol gas sensor with more sensitive response. In addition, this method reduces the cost of material purchase.","PeriodicalId":7670,"journal":{"name":"AIMS Materials Science","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70087708","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}

引用次数: 0

Mechanical analyses of flat sheet water treatment membranes 平板水处理膜的力学分析

IF 1.8

AIMS Materials Science Pub Date : 2022-01-01 DOI: 10.3934/matersci.2022052

M. Ozdemir, S. Oterkus, E. Oterkus, I. Amin, A. El-Aassar, H. Shawky

引用次数: 0

Physicochemical characterization of lignocellulose fibers obtained from seedpods of Wrightia tinctoria plant 白莱特种子木质纤维素纤维的理化性质研究

IF 1.8

AIMS Materials Science Pub Date : 2022-01-01 DOI: 10.3934/matersci.2022009

S. Habibunnisa, Ruben Nerella, Sri Rama Chand Madduru, R. S

{"title":"Physicochemical characterization of lignocellulose fibers obtained from seedpods of Wrightia tinctoria plant","authors":"S. Habibunnisa, Ruben Nerella, Sri Rama Chand Madduru, R. S","doi":"10.3934/matersci.2022009","DOIUrl":"https://doi.org/10.3934/matersci.2022009","url":null,"abstract":"Characterization of new innovative natural seed fibers from seedpods or fruits of various plants has increased popularly in textile, automotive, and construction industries due to various aspects, availability, and biodegradability. In addition, these fibers provide sustainable solutions to support technological innovation in numerous industrial applications. The current research aims to investigate the new lignocellulose fibers extracted from Wrightia tinctoria seedpods. The obtained Wrightia tinctoria seed fibers (WTSFs) were characterized via Scanning electron microscope (SEM), Fourier Transform Infrared-ray (FTIR), X-ray diffraction (XRD), Thermogravimetric analysis (TGA), and Differential scanning calorimetry (DSC) to understand the fibers physicochemical properties. Complete experimental study of natural seed fibers of Wrightia tinctoria found to be a lignocellulose fiber and contains unique characteristics. Surface morphological studies reveal that, WTSFs contain smoother surface which is beneficial to develop a good bond with matrix while making composites. It does not get wet quickly with water due to fatty, wax, mineral matters, and higher lignin content on the fiber surface which means the fiber is soft compared with other natural seed fibers. These unique properties of WTSFs ascertain as a suitable material for polymer fabrication process, which would be favourable to develop good bonding with the matrix for making composites and also useful for insulating composite materials.","PeriodicalId":7670,"journal":{"name":"AIMS Materials Science","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70087852","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}

引用次数: 1

Propagation of corrosion induced fatigue crack in aluminum alloy 铝合金腐蚀疲劳裂纹的扩展

IF 1.8

AIMS Materials Science Pub Date : 2022-01-01 DOI: 10.3934/matersci.2022030

Pawan Kumar, B. Verma

{"title":"Propagation of corrosion induced fatigue crack in aluminum alloy","authors":"Pawan Kumar, B. Verma","doi":"10.3934/matersci.2022030","DOIUrl":"https://doi.org/10.3934/matersci.2022030","url":null,"abstract":"Aluminium is considered a green metal due to its environmental responsive characteristics. The 7475-T7351 aluminum alloy is extensively used in automotive and aerospace applications due to its light weight and high strength. In the present work, the effects of the corrosive environment on the high cycle fatigue (HCF) behaviors of the 7475-T7351 aluminum alloy was investigated. The aqueous solution of sodium chloride was used for solution treatment. The HCF test was performed on pre-cracked specimens using a servo-hydraulic universal testing machine, Instron 8800. The fractured specimens were characterized using a scanning electron microscope. It was observed that the crack propagation occurred through anodic dissolution at high stress and a significant crack tip blunting and crack extension occurred. However, no appreciable change in crack growth was noticed over the lower frequency range of 0.1 to 0.9 Hz. The slower growth rate envisages oxide debris formation between the cracked faces. When the alloy was treated under corrosive environments, the HCF tests depicted that the fatigue life reduces up to two orders of magnitude. The corrosion pits induced the crack initiation in stage-I at lower alternating stress; however, the fatigue crack growth rate (FCGR) was increased in the corrosive environment. The transition from stage-I to stage-II occurred at a lower stress intensity range (∆K) level; it was due to the combined effects of corrosion, hydrogen embrittlement, active path dissolution, and stress concentration. The corrosion fatigue test at low frequency also depicted a slower FCGR as compared to its moderate frequency counterpart and showed an irregular crack growth behavior.","PeriodicalId":7670,"journal":{"name":"AIMS Materials Science","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70088849","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}

引用次数: 1

Materials for Additive Manufacturing 增材制造材料

IF 1.8

AIMS Materials Science Pub Date : 2022-01-01 DOI: 10.3934/matersci.2022048

John (Ioannis) D. Kechagias

引用次数: 5

Influence of the thermomechanical behavior of NiTi wires embedded in a damper on its damping capacity: Application to a bridge cable 埋在阻尼器中的镍钛丝的热力学性能对阻尼能力的影响:在桥梁电缆上的应用

IF 1.8

AIMS Materials Science Pub Date : 2022-01-01 DOI: 10.3934/matersci.2023001

Helbert Guillaume, Dieng Lamine, Chirani Shabnam Arbab, Pilvin Philippe

{"title":"Influence of the thermomechanical behavior of NiTi wires embedded in a damper on its damping capacity: Application to a bridge cable","authors":"Helbert Guillaume, Dieng Lamine, Chirani Shabnam Arbab, Pilvin Philippe","doi":"10.3934/matersci.2023001","DOIUrl":"https://doi.org/10.3934/matersci.2023001","url":null,"abstract":"Thanks to high dissipation properties, embedding NiTi Shape Memory Alloys in passive damping devices is effective to mitigate vibrations in building and cable structures. These devices can inconceivably be tested directly on full-scale experimental structures or on structures in service. To predict their effectiveness and optimize the set-up parameters, numerical tools are more and more developed. Most of them consist of Finite Element models representing the structure equipped with the damping device, embedding parts associated with a superelastic behavior. Generally, the implemented behavior laws do not include all the phenomena at the origin of strain energy dissipation, but stress-induced martensitic transformation only. This article presents a thermomechanical behavior law including the following phenomena: (i) intermediate R-phase transformation, (ii) thermal effects and (iii) strain localization. This law was implemented in a commercial Finite Element code to study the dynamic response of a bridge cable equipped with a NiTi wire-based damping device. The numerical results were compared to full-scale experimental ones, by considering the above-mentioned phenomena taken coupled or isolated: it has been shown that it is necessary to take all of these phenomena into account in order to successfully predict the damping capacity of the device.","PeriodicalId":7670,"journal":{"name":"AIMS Materials Science","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70089390","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}

引用次数: 0

Synthesis of methyl esters from palm oil, candlenut oil, and sunflower seed oil and their corrosion phenomena on iron nail 棕榈油、花生油和葵花籽油甲酯的合成及其对铁钉的腐蚀现象

IF 1.8

AIMS Materials Science Pub Date : 2022-01-01 DOI: 10.3934/matersci.2022044

A. Santoso, Novita Agustin, S. Sumari, Siti Marfuah, R. Retnosari, I. B. Rachman, A. Wijaya, Muhammad Roy Asrori

{"title":"Synthesis of methyl esters from palm oil, candlenut oil, and sunflower seed oil and their corrosion phenomena on iron nail","authors":"A. Santoso, Novita Agustin, S. Sumari, Siti Marfuah, R. Retnosari, I. B. Rachman, A. Wijaya, Muhammad Roy Asrori","doi":"10.3934/matersci.2022044","DOIUrl":"https://doi.org/10.3934/matersci.2022044","url":null,"abstract":"Biodiesel products show corrosive properties. Biodiesel contains components of saturated and unsaturated esters which tend to be unstable, sensitive to light, temperature, and metal ions. Thus, the study aims to synthesize biodiesel from various vegetable oils (palm oil, sunflower seed oil, and candlenut oil), and to analyze its corrosiveness to ferrous nails and characterization of biodiesel. The research stages were: synthesis of methyl ester and its characterization, and corrosion test. The results showed that the methyl ester characteristics of the samples meet requirements with SNI7182 : 2015. In GC-MS results, the largest components of methyl esters from candlenut oil and sunflower seed oil were 35.04% methyl oleate and 46.79% methyl oleate respectively, while in palm oil, the largest components were 41.60% methyl oleate and 41.16%. methyl palmitate. Corrosion test showed that the corrosion rate of ferrous nail in biodiesel at room temperature was lower than 70 ℃. Based on GC-MS and SEM results, biodiesel contained high unsaturated fatty acids and had a corrosion rate, i.e., at room temperature, the methyl ester of palm oil, candlenut oil, and sunflower seed oil were 0.006 mpy, 0.011 mpy, and 0.011 mpy respectively, while at 70 ℃, they were 0.011 mpy, 0.016 mpy, and 0.017 mpy, respectively. The results corresponded to SEM results at high temperature and significantly high content of unsaturated fatty acids. It was indicated by the formation of pits.","PeriodicalId":7670,"journal":{"name":"AIMS Materials Science","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70089462","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}

引用次数: 1

Mechanical properties and dry sliding wear behaviour of Al–Si–Mg alloy by equal channel angular pressing 等径角挤压Al-Si-Mg合金的力学性能及干滑动磨损行为

IF 1.8

AIMS Materials Science Pub Date : 2022-01-01 DOI: 10.3934/matersci.2022045

N.F.B.W. Anuar, M. S. Salleh, M. Z. Omar, Saifudin Hafiz Yahaya

{"title":"Mechanical properties and dry sliding wear behaviour of Al–Si–Mg alloy by equal channel angular pressing","authors":"N.F.B.W. Anuar, M. S. Salleh, M. Z. Omar, Saifudin Hafiz Yahaya","doi":"10.3934/matersci.2022045","DOIUrl":"https://doi.org/10.3934/matersci.2022045","url":null,"abstract":"This study investigated the microstructure, hardness, tensile and tribological behaviour of a cooling slope Al–Si–Mg alloy following ECAP and T6 heat treatment. The optical and scanning electron microscopes were applied to investigate the microstructure of the as-cast material and heat-treated ECAPed Al–Si–Mg alloy. The dry sliding wear test was tested with three different loads of 10 N, 50 N, and 100 N with constant sliding speed and sliding distance at 1.0 m/s and 9000 m, respectively, using the pin-on-disc tribometer. The hardness and tensile properties were evaluated through microhardness, UTS, and YS measurement for the as-cast Al–Si–Mg alloy, both heat-treated with and without ECAPed alloys. Moreover, wear rate and COF in the Al–Si–Mg alloy with different loads were analysed and linked with microstructural and strength behaviour after the ECAP process. Meanwhile, these analyses of results were correlated with the behaviour of the as-cast Al–Si–Mg aluminium alloy and heat-treated non-ECAPed alloy. Results demonstrated that a combination of ECAP processing and T6 heat treatment improves the mechanical behaviour, while the COF and wear rate are improved at a load of 100 N.","PeriodicalId":7670,"journal":{"name":"AIMS Materials Science","volume":"2018 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70089468","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}

引用次数: 2

Fe-TiO2/zeolite H-A photocatalyst for degradation of waste dye (methylene blue) under UV irradiation Fe-TiO2/沸石H-A光催化剂在紫外照射下降解废染料(亚甲基蓝

IF 1.8

AIMS Materials Science Pub Date : 2022-01-01 DOI: 10.3934/matersci.2023003

R. Cahyanti, S. Sumari, F. Fajaroh, Muhammad Roy Asrori, Yana Fajar Prakasa

引用次数: 3