Key Engineering Materials最新文献_第4页

Influence of Hydrogen on the Failure Mechanism of Standard Duplex Stainless Steel X2CrNiMoN22-5-3 Exposed to Corrosion Fatigue 氢对暴露于腐蚀疲劳的标准双相不锈钢 X2CrNiMoN22-5-3 失效机理的影响

Key Engineering Materials Pub Date : 2024-07-03 DOI: 10.4028/p-QJf7Bl

M. Wolf, A. Pfennig

引用次数: 0

Crystallinity Study of Electrodeposited SnO2 on FTO Substrate FTO 基底上电沉积二氧化硒的结晶度研究

Key Engineering Materials Pub Date : 2024-04-18 DOI: 10.4028/p-5z5lce

Uddipan Agasti, S. Karmakar, S. Kundu, Mili Sarkar, Sayan Chatterjee

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Processing and Application of Engineering Materials 工程材料的加工与应用

Key Engineering Materials Pub Date : 2024-04-18 DOI: 10.4028/b-7dfrjt

Bruno Castanie, Ramesh K. Agarwal, Sandip A. Kale, Shanmugam Thillikkani

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Evaluation of Recycled Polypropylene (PP) Made from Plastic Cups as Filaments for Additive Manufacturing 评估将塑料杯制成的回收聚丙烯 (PP) 用作增材制造丝材的情况

Key Engineering Materials Pub Date : 2024-04-18 DOI: 10.4028/p-p4o9jk

Ria Grace P. Abdon, Shanlaine F. Barbastro, Kian James C. Francisco, Cedric John D. Quicay

{"title":"Evaluation of Recycled Polypropylene (PP) Made from Plastic Cups as Filaments for Additive Manufacturing","authors":"Ria Grace P. Abdon, Shanlaine F. Barbastro, Kian James C. Francisco, Cedric John D. Quicay","doi":"10.4028/p-p4o9jk","DOIUrl":"https://doi.org/10.4028/p-p4o9jk","url":null,"abstract":"Plastic waste is one of the most problematic wastes produced daily. A potential solution to this problem is to recycle and convert them into filaments for 3D printing. This study aims to prepare recycled polypropylene (rPP) from plastic cups and convert them into filaments for 3D printing using an extrusion process. It also aims to produce a quality printout and compare its mechanical properties with a commercial filament, polylactic acid (PLA). In this study, rPP cups were collected and treated to undergo an extrusion process. A temperature calibration tower was then fabricated to determine the ideal temperature settings for printing. Lastly a total of 24 tensile and flexural specimens were printed utilizing both rPP and PLA, facilitating a comparative evaluation of their mechanical properties. Results showed that the best extruder heater settings were 240°C, 235°C, 210°C, and 180°C from heat zone 1 to 4. The ideal printing temperature for rPP material was established at 230°C. The application of polypropylene packaging tapes, hairspray, and incorporation of a brim around the model proved effective in mitigating warpage during the printing process. Mechanical testing indicated an average tensile strength and flexural strength of 24.5 MPa and 45 MPa, respectively. In contrast the average tensile strength and flexural strength for PLA was measured at 43 MPa and 80 MPa respectively. It is clear that PLA demonstrated higher outcomes, but it lacks durability and flexibility exhibited by rPP.","PeriodicalId":17714,"journal":{"name":"Key Engineering Materials","volume":" 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140687615","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

Development and Characterization of a Micro-Concrete Based on Wood Waste from Sawmills 基于锯木厂木材废料的微混凝土的开发与表征

Key Engineering Materials Pub Date : 2024-04-18 DOI: 10.4028/p-syj2nc

Rachel Raïssa Ngono Mvondo, René Oum Lissouck, Sophie Grigoletto

{"title":"Development and Characterization of a Micro-Concrete Based on Wood Waste from Sawmills","authors":"Rachel Raïssa Ngono Mvondo, René Oum Lissouck, Sophie Grigoletto","doi":"10.4028/p-syj2nc","DOIUrl":"https://doi.org/10.4028/p-syj2nc","url":null,"abstract":"An experimental study was carried out to evaluate the feasibility of using concrete compositions containing waste wood for structural and non-structural building applications. First, the inert and wood aggregates used in the composite design were characterized. Five compositions containing a reference, 50% and 100% of wood particles were then produced and characterized in terms of physical and mechanical performance (e.g., apparent density, abrasion, compressive strength, and flexural strength). The selected specimens were used for additional experimental tests. These included water absorption and thermal tests. Increasing wood waste content considerably lower compressive and flexural strengths while improving the thermal insulation quality of wood waste-cement composite. The durability assessment of selected compositions further showed that the abrasion resistance of manufactured specimen decreased by adding wood waste in the cement matrix while there was an increase of the capillarity absorption coefficients. It appears that the incorporation of waste wood particles into mortars decrease their thermal conductivities to 0.3 W/mK. The use of wood waste treated by a lime solution improves the studied properties.","PeriodicalId":17714,"journal":{"name":"Key Engineering Materials","volume":" 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140690162","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

Experimental and Numerical Study of the Physico-Hygrothermal Behavior of Two Tropical Wood Species 两种热带木材的物理热学行为的实验和数值研究

Key Engineering Materials Pub Date : 2024-04-18 DOI: 10.4028/p-xsva64

Carlos A. Houngbeme, A. Houngan, Armand A. Djossou

{"title":"Experimental and Numerical Study of the Physico-Hygrothermal Behavior of Two Tropical Wood Species","authors":"Carlos A. Houngbeme, A. Houngan, Armand A. Djossou","doi":"10.4028/p-xsva64","DOIUrl":"https://doi.org/10.4028/p-xsva64","url":null,"abstract":"In the first stage. an integral saturation test of lignocellulosic materials was carried out on samples of wood under the control of a previously established theoretical basis. At the end of this test. parameters such as the porosity at saturation with water. the basal density. the total volume shrinkage. the linear shrinkages. the density at the saturation of the samples are deduced. The second stage of this work is based on the exploitation of the hot tape method to achieve the thermophysical properties of wood samples over a range of humidity levels from 0% to 60%. The last stage of this research consisted in developing in the laboratory a device for controlling the saturation rate of steam in order to determine the adsorption/desorption isotherms. the mass diffusivity and the water capacity of these same wood species at various temperature. The counting of the results resulting from these tests has pointed out. among other things. that gmelia arborea is a more hygroscopic. lighter and more thermally insulating wood than afzelia wood. It is also noted that the two species of wood have average shrinkage. anisotropy and nervousness suggesting good stability in service. It is also noticed that equilibrium moisture sorption by these species increases with increasing relative humidity at constant temperature. but decreases slightly as temperature increases at constant humidity. In short . this work reinforces the database on tropical woods by providing in particular more local measurements. allowing the reliable dimensioning of wooden structures.","PeriodicalId":17714,"journal":{"name":"Key Engineering Materials","volume":" 47","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140689100","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

Modeling and Simulation of Friction Stir Welding of Aluminum and Magnesium Alloys Using Finite Element Analysis 利用有限元分析对铝合金和镁合金的搅拌摩擦焊接进行建模和模拟

Key Engineering Materials Pub Date : 2024-04-18 DOI: 10.4028/p-47wkms

Dame Alemayehu Efa, E. M. Gutema, H. Lemu, Mahesh Gopal

{"title":"Modeling and Simulation of Friction Stir Welding of Aluminum and Magnesium Alloys Using Finite Element Analysis","authors":"Dame Alemayehu Efa, E. M. Gutema, H. Lemu, Mahesh Gopal","doi":"10.4028/p-47wkms","DOIUrl":"https://doi.org/10.4028/p-47wkms","url":null,"abstract":"The aviation and automobile sectors have witnessed significant expansion and demand for lightweight metals. The friction stir welding (FSW) procedure is used for joining lightweight and low melting temperature materials. A Finite Element Analysis (FEA) utilising COMSOL® Multiphysics 6.0 software is utilised in this article to combine dissimilar metals AA6061-T6 and Mg AZ31-B, and their thermo-mechanical characteristics are explored. The peak temperature was observed to increase to 448K and 928K when the coefficient of friction (COF) increased from 0.01 to 0.4, while other parameters remained constant. When the tool rotational speed is increased to 500, 600, or 700 rpm, the peak temperature climbs to 658 K, 706 K, and 759 K, while all other parameters stay constant. When the welding speed is increased, the peak temperature reduces from 665K, 649K, and 638K to 45mm/min, 60mm/min, and 75mm/min, with all other parameters remained constant in this study. The peak temperature climbed to 632K, 684K, and 759K when the axial force increased to 10 kN, 15 kN, and 20 kN, respectively, which is a tolerable temperature less than the point of melting of materials. Peak temperatures increase to 628K, 630K, and 635K when the shoulder-to-pin diameter ratio increases to 2.5, 3.0 and 3.5 with all other parameters remaining constant. As a result, the peak temperature is directly related to tool rotational speed, coefficient of friction, axial force, and shoulder-to-pin diameter ratio, whereas welding speed is inversely proportional.","PeriodicalId":17714,"journal":{"name":"Key Engineering Materials","volume":" 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140688995","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

Thermoelectric Properties of Spray Coated n-Type PEDOT:PSS Film 喷涂 n 型 PEDOT:PSS 薄膜的热电性能

Key Engineering Materials Pub Date : 2024-04-18 DOI: 10.4028/p-so3x5d

Cyril O. Ugwuoke, Ahmed Abd El-Moneim, Mohsen Ghali

引用次数: 0

Comparative Analysis of Local Materials Effects on Two Buildings Thermal Behaviours in Sahelian Climate 萨赫勒气候下当地材料对两栋建筑热性能影响的对比分析

Key Engineering Materials Pub Date : 2024-04-18 DOI: 10.4028/p-l3tgxq

Felicité Ronelngar Modjinguem, Malloum Soultan, Jacques Jay, Michel Querry

引用次数: 0

Optimization of Titanium Alloy-Ti-6Al-4V to Minimize Mass, Maximize Stiffness and Frequency in Additive Manufacturing 优化钛合金-Ti-6Al-4V，使增材制造中的质量最小、刚度最大、频率最高

Key Engineering Materials Pub Date : 2024-04-18 DOI: 10.4028/p-so6m4z

Dame Alemayehu Efa, E. M. Gutema, H. Lemu, Mahesh Gopal

{"title":"Optimization of Titanium Alloy-Ti-6Al-4V to Minimize Mass, Maximize Stiffness and Frequency in Additive Manufacturing","authors":"Dame Alemayehu Efa, E. M. Gutema, H. Lemu, Mahesh Gopal","doi":"10.4028/p-so6m4z","DOIUrl":"https://doi.org/10.4028/p-so6m4z","url":null,"abstract":"Manufacture of intricate components, products without the need for tooling, shorter lead times and material grading are the most beneficial applications of Additive Manufacturing (AM). The goal of this study is to develop a design optimization framework for developing an aircraft component using additive manufacturing utilizing topology and lattice optimization techniques. Solid works were used to create a 3D model of an aircraft bracket made of Titanium alloy. To minimize mass and maximize frequency and stiffness, the optimization was performed using Altair Inspire 2022.1 software. Component optimization was performed using the finite element method, which entails reducing material while maintaining the proper function of the modelled component. The optimal performance of the designed aerospace component using topology with lattice infill is achieved with minimization of mass from 2.24810 kg to 0.16235 kg and the volume from 5.07579x105 mm3 to 4.70922x102 mm3, frequency is increased from 0.02 kHz to 13.9537 kHz, stiffness is maximized from 1,485,884.1 N/m to 4,558,924.0939 N/m with a factor of safety of 1.73. Therefore, the mechanical properties of the optimized model can full fill its overall performance.","PeriodicalId":17714,"journal":{"name":"Key Engineering Materials","volume":" 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140688306","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