Materials Science Forum最新文献_第2页

Incorporating Graphene Nanofiller for the Improvement of Hydrophobic Properties of Cassava Peel Starch Bioplastic 加入石墨烯纳米填料改善木薯皮淀粉生物塑料的疏水性能

Materials Science Forum Pub Date : 2024-05-21 DOI: 10.4028/p-9fcqbm

A. Ganda, Diah Wulandari, Firman Yasa Utama, W. Warju, Dyah Riandadari, Dewi Puspitasari, Lena Citra Manggalasari

引用次数: 0

Optimizing Aluminum Melting with Sustainable Biomass Fuels: A Case Study of Ulin (Eusideroxylon zwageri) Wood and Galam (Melaleuca cajuputi) Wood 利用可持续生物质燃料优化铝熔炼：乌林木（Eusideroxylon zwageri）和加兰木（Melaleuca cajuputi）案例研究

Materials Science Forum Pub Date : 2024-05-21 DOI: 10.4028/p-j1jl2n

Teguh Suprianto, Muhammad Kasim, Akbar Ela Heka, D. Darmansyah

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Microstructure and Mechanical Characteristics of Friction Welded Joint between Alumina and Aluminum Casting Alloy 氧化铝与铝铸造合金摩擦焊接接头的显微结构和机械特性

Materials Science Forum Pub Date : 2024-05-21 DOI: 10.4028/p-9esrhc

Tsuyoshi Takahashi, Son Thanh Nguyen, Masaaki Kimura

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Advanced Materials and Materials Application 先进材料与材料应用

Materials Science Forum Pub Date : 2024-05-21 DOI: 10.4028/b-uliu8t

F. Gapsari, Bruno Castanie, Ramesh K. Agarwal

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Microcrystalline Cellulose as Composite Reinforcement: Assessment and Future Prospects 作为复合材料增强材料的微晶纤维素：评估与未来展望

Materials Science Forum Pub Date : 2024-05-21 DOI: 10.4028/p-viyb6d

Cahyo Hadi Wibowo, D. Ariawan, E. Surojo, Sunardi Sunardi

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Materials and Technologies for Advanced Engineering Research 先进工程研究的材料与技术

Materials Science Forum Pub Date : 2024-05-14 DOI: 10.4028/b-gnd7wc

Iulian Vaile Antoniac, Guillermo Requena

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Effect of Artificial Aging in the Microstructure and Corrosion Performance of Superduplex UNS S32750 Stainless Steel 人工老化对超级双相 UNS S32750 不锈钢微观结构和腐蚀性能的影响

Materials Science Forum Pub Date : 2024-05-14 DOI: 10.4028/p-ibs0sh

Alexandre Pereira Dall'Oglio, W. Haupt, K. Riffel, R. H. Gonçalves e Silva

{"title":"Effect of Artificial Aging in the Microstructure and Corrosion Performance of Superduplex UNS S32750 Stainless Steel","authors":"Alexandre Pereira Dall'Oglio, W. Haupt, K. Riffel, R. H. Gonçalves e Silva","doi":"10.4028/p-ibs0sh","DOIUrl":"https://doi.org/10.4028/p-ibs0sh","url":null,"abstract":"Superduplex stainless steels have great mechanical and corrosion properties. However, its chemical composition makes it prone to intermetallic phase precipitation during thermal processing. Sigma (σ), chi (χ), and chromium nitrides (Cr2N) remove Cr and Mo from the matrix, reducing the corrosion and mechanical resistance. Understanding the effects of thermal processing on the secondary phase’s precipitation and depletion of the material’s performance is crucial to its applications. Thus, this work aims to analyze the behavior of the corrosion performance of the UNS S32750 after thermal treatment at 800°C, for 60, 180, 300, and 420 minutes, in comparison to the as-received material. Optical emission spectrometry, X-ray diffraction, and SEM with backscattered electrons (BSE) were used to evaluate the material. The corrosion performance was evaluated with the cyclic potentiodynamic polarization technique. The main results and conclusions obtained in the study were a decomposition of the ferrite phase into the χ and σ phases, with the formation of the χ phase being predominant in shorter times, while for longer aging times σ formed in greater quantities. It was also possible to verify a more aggressive corrosion trend for aged samples in the regions adjacent to the formation of the χ and σ phases. It was also possible to observe that the losses generated in corrosion resistance were greater for aging times longer than 60 minutes. The aging treatment significantly reduced the material’s corrosion resistance in conjunction with the formation of precipitates.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"35 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140981385","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

Investigation of Hydrogen Embrittlement Effect on Microstructure Mechanical Properties and Fracture of Low-Carbon Steels 氢脆对低碳钢微观结构力学性能和断裂影响的研究

Materials Science Forum Pub Date : 2024-05-14 DOI: 10.4028/p-zame7f

Maria Eleni Mamassi, D. Ioannidou, Stavros Deligiannis, P. Tsakiridis

{"title":"Investigation of Hydrogen Embrittlement Effect on Microstructure Mechanical Properties and Fracture of Low-Carbon Steels","authors":"Maria Eleni Mamassi, D. Ioannidou, Stavros Deligiannis, P. Tsakiridis","doi":"10.4028/p-zame7f","DOIUrl":"https://doi.org/10.4028/p-zame7f","url":null,"abstract":"Steel hydrogen embrittlement (HE), a complex and multifaceted issue, can lead to sudden and catastrophic failure, without significant plastic deformation, making it a critical concern in the industrial sector. The present investigation focuses on the evaluation of HE effects regarding microstructure, mechanical properties degradation and type of fracture of AISI 1010 low-carbon steel, after accelerated hydrogen cathodic charging. Hydrogen was diffused electrolytically in 0.2 Μ H2SO4 solution, containing 3g/L of NH4SCN, using a cathodic current density of 10 and 20 mA/cm2, for 6 and 18 h. Mechanical properties were investigated through slow-rate tensile tests, as well as Charpy V-notch (CVN) impact tests, to determine the value of fracture toughness, both in uncharged and electrochemically pre-charged specimens. Vickers microhardness tests were conducted on the cross-sections of the hydrogen charged samples to evaluate embrittlement susceptibility, due to the presence of dissolved hydrogen. The microstructure modification was carried out through light optical (LOM) and scanning electron microscopy (SEM), in conjunction with an energy-dispersive X-ray detector (EDS). Slow scan X-ray diffraction (SSXRD) was also conducted for crystal structure analysis. The microstructure analysis showed the presence of large amounts of secondary cracks and cavities into the steel matrix, due to hydrogen diffusion and its accumulation at various sites. Hydrogen charging caused a significant gradual elongation decrease of the parent material, from 25% to 6.73%, in case of embrittlement at 20 mA/cm2 for 18h. Accordingly, after 18 h of exposure, the impact energy decrement was determined at 31.5%, at a current density of 10 mA/cm2, whereas the corresponding reduction at 20 mA/cm2 reached 68%.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"18 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140981992","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

Calculation of Gibbs Free Energy of Iron Based Alloys Using Miedema's Model and Comparison with Experiment 利用米德玛模型计算铁基合金的吉布斯自由能并与实验进行比较

Materials Science Forum Pub Date : 2024-05-14 DOI: 10.4028/p-6ykus2

Ali K. Kadhim

引用次数: 0

Study on the Optimization and Experimental of Fly Ash and Sludge in Ecological Slope Protection Substrate 粉煤灰和污泥在生态护坡基质中的优化与试验研究

Materials Science Forum Pub Date : 2024-05-14 DOI: 10.4028/p-z1hrog

Hai Tao Wang, Yu Zhang, Lin Lin Liu, Yue Xin, Kun Ren

{"title":"Study on the Optimization and Experimental of Fly Ash and Sludge in Ecological Slope Protection Substrate","authors":"Hai Tao Wang, Yu Zhang, Lin Lin Liu, Yue Xin, Kun Ren","doi":"10.4028/p-z1hrog","DOIUrl":"https://doi.org/10.4028/p-z1hrog","url":null,"abstract":"At present, adding solid waste in plant substrate to replace part of planting soil has become a new direction in the field of ecological slope protection substrate research. In this paper, 16 groups of indoor orthogonal experiments were carried out with fly ash and sludge as the components of vegetation substrate and tall fescue as the planting object to explore the influence of ecological slope protection substrate on vegetation growth. Based on the range analysis method, the three functions of substrate planting performance, mechanical properties and substrate properties were used as references, and the entropy weight method (EWM) was used to assign weights to the proportion of each index in the total score, and the ratio was optimized. The results show that the optimal substrate ratio is 10% sludge content, 30% fly ash, 4% cement, 6% fiber, 50% planting soil (the ratio of loess and peat soil is 1:3). Fly ash has a great influence on the height of plants and vegetation coverage, and has a significant effect on the internal friction angle and fertility of the substrate. Sludge mainly affects the growth height of plants and the pH value and fertility of the substrate. The importance of factors affecting the growth of plants from large to small is: fly ash, the ratio of loess and peat soil, sludge, rice husk, cement.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"2 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140982218","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