Advances in Materials Science最新文献_第9页

3D-Printed Tool Shoulder Design for the Analogue Modelling of Bobbin Friction Stir Weld Joint Quality 筒管搅拌摩擦焊缝质量模拟建模的3d打印刀肩设计

IF 1.3

Advances in Materials Science Pub Date : 2021-03-01 DOI: 10.2478/adms-2021-0003

A. Tamadon, D. Pons, K. Chakradhar, J. Kamboj, D. Clucas

{"title":"3D-Printed Tool Shoulder Design for the Analogue Modelling of Bobbin Friction Stir Weld Joint Quality","authors":"A. Tamadon, D. Pons, K. Chakradhar, J. Kamboj, D. Clucas","doi":"10.2478/adms-2021-0003","DOIUrl":"https://doi.org/10.2478/adms-2021-0003","url":null,"abstract":"Abstract A variety of tool shoulder designs comprising three families i.e. blade, spiral and circular shaped scrolls, were produced to improve the material flow and restrictions to avoid the tunnel void. The bobbin tools were manufactured by 3D printing additive manufacturing technology using solid filament. The butt weld joint was produced by each tool using plasticine as the workpiece material. The apparent surface features and bi-colour cross-sections provided a physical flow comparison among the shoulder designs. For the bobbin friction stir welding (BFSW), the tool shoulder with a three-spiral design produced the most stability with the best combination of the flow patterns on surface and cross-sections. The circular family tools showed a suitable intermixing on the surface pattern, while the blade scrolls showed better flow features within the cross-sections. The flow-driven effect of the shoulder features of the bobbin-tool design (inscribed grooves) was replicated by the 3D-printed tools and the analogue modelling of the weld samples. Similar flow patterns were achieved by dissimilar aluminium-copper weld, validating the accuracy of the analogue plasticine for the flow visualization of the bobbin friction stir welding.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80265285","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

Advances in Materials Science Editorial on the Journal’s 20th Anniversary 《材料科学进展》杂志创刊20周年社论

IF 1.3

Advances in Materials Science Pub Date : 2021-03-01 DOI: 10.2478/adms-2021-0001

J. Łabanowski, D. Fydrych

引用次数: 0

Thermal Waters Circulation During the Formation of Ore Deposits 矿床形成过程中的热水循环

IF 1.3

Advances in Materials Science Pub Date : 2021-01-01 DOI: 10.11648/j.am.20211004.12

Ivan Vadimovich Gordienko, Vadim Vyacheslavovich Gordienko

引用次数: 0

Study on the Preparation of Magnetic Pine Needle Biochar and Its Adsorption Performance for the Dye 磁性松针生物炭的制备及其对染料的吸附性能研究

IF 1.3

Advances in Materials Science Pub Date : 2021-01-01 DOI: 10.11648/j.am.20211004.14

Zhiyong Han, Dehua Wang, Jie Wu, Q. Xiong, Yanxia Zhang, Kai Zhang

引用次数: 1

Microstructure and Mineralogy of Compressed Earth Bricks Incorporating Shea Butter Wastes Stabilized with Cement 水泥稳定乳木果废压缩土砖的微观结构和矿物学研究

IF 1.3

Advances in Materials Science Pub Date : 2021-01-01 DOI: 10.11648/j.am.20211004.13

Alfred Niamien Kouamé, Léon Koffi Konan, Bi Irié Hervé Gouré Doubi

{"title":"Microstructure and Mineralogy of Compressed Earth Bricks Incorporating Shea Butter Wastes Stabilized with Cement","authors":"Alfred Niamien Kouamé, Léon Koffi Konan, Bi Irié Hervé Gouré Doubi","doi":"10.11648/j.am.20211004.13","DOIUrl":"https://doi.org/10.11648/j.am.20211004.13","url":null,"abstract":"The current context of sustainable development encourages the development of materials with low environmental impact, which explains the renewed interest in earthen constructions. This study is therefore a contribution to the valorization of clay raw materials from Côte d'Ivoire and agro-industrial waste in eco-construction. The aims of this study was studied the effect of shea butter wastes on the mineralogy and microstructure of Compressed Earth Bricks (CEB) stabilized with cement. To do this, two clay raw materials denoted F (Fronan) and K (Katiola) were sampled and then characterized. Various geotechnical and physicochemical tests have shown that these soils are loamy sand of class A2 and essentially contain quartz, kaolinite, mica and ferric compounds. As for shea butter wastes, it is mainly rich in lignin (32%); cellulose (28%) and hemicellulose (19%). Several samples of bricks with different percentages by mass of clay and shea butter wastes (0-10%), stabilized with 5% cement were prepared and then characterized. The results of the mechanical tests showed that the claycement matrix could contain 4% shea butter wastes for the formulations with clay F against 6% with clay K. The corresponding optimal formulations are F91TK4C5 and K89TK6C5 with clays F and K respectively. The SEM images showed a less dense microstructure for the optimal formulation F91TK4C5 compared to that of the clay-cement matrix unlike K89TK6C5 where the microstructure remained always dense. X-ray diffraction did not allow to observe mineralogical modifications with the incorporation of shea butter wastes into the clay-cement matrix due to their low quantities in the optimal formulations.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81347017","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: 3

EBSD Characterization of Bobbin Friction Stir Welding of AA6082-T6 Aluminium Alloy AA6082-T6铝合金筒管搅拌摩擦焊的EBSD表征

IF 1.3

Advances in Materials Science Pub Date : 2020-12-01 DOI: 10.2478/adms-2020-0022

A. Tamadon, D. Pons, D. Clucas

{"title":"EBSD Characterization of Bobbin Friction Stir Welding of AA6082-T6 Aluminium Alloy","authors":"A. Tamadon, D. Pons, D. Clucas","doi":"10.2478/adms-2020-0022","DOIUrl":"https://doi.org/10.2478/adms-2020-0022","url":null,"abstract":"Abstract Electron Backscatter Diffraction (EBSD) was used to determine microstructural evolution in AA6082-T6 welds processed by the Bobbin Friction Stir Welding (BFSW). This revealed details of grain-boundaries in different regions of the weld microstructure. Different polycrystalline transformations were observed through the weld texture. The Stirring Zone (SZ) underwent severe grain fragmentation and a uniform Dynamic Recrystallisation (DRX). The transition region experienced stored strain which changed the grain size and morphology via sub-grain-boundary transformations. Other observations were of micro-cracks, the presence of oxidization, and the presence of strain hardening associated with precipitates. Flow-arms in welds are caused by DRX processes including shear, and low and high angle grain boundaries. Welding variables affect internal flow which affects microstructural integrity. The shear deformation induced by the pin causes a non-uniform thermal and strain gradient across the weld region, leading to formation of mixed state transformation of grain morphologies through the polycrystalline structure. The grain boundary mapping represents the differences in DRX mechanism I different regions of the weld, elucidates by the consequences of the thermomechanical nature of the weld. The EBSD micrographs indicated that the localised stored strain at the boundary regions of the weld (e.g. flow-arms) has a more distinct effect in emergence of thermomechanical nonuniformities within the DRX microstructure.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88497542","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: 4

Metallurgical Characterization and Kinetics of Borided 34CrNiMo6 Steel 硼化34CrNiMo6钢的冶金特性及动力学

IF 1.3

Advances in Materials Science Pub Date : 2020-12-01 DOI: 10.2478/adms-2020-0021

N. Uçar, M. Yiğit, A. Çalık

引用次数: 5

Experimental Analysis of Single Point Incremental Forming of Truncated Cones in DC04 Steel Sheet DC04钢板截锥单点增量成形试验分析

IF 1.3

Advances in Materials Science Pub Date : 2020-12-01 DOI: 10.2478/adms-2020-0018

B. Krasowski, A. Kubit, T. Trzepieciński, J. Slota

引用次数: 5

Effect of Different Sized Multi Walled Carbon Nanotubes on the Barrier Potential and Trap Concentration of Malachite Green Dye Based Organic Device 不同尺寸的多壁碳纳米管对孔雀石绿染料基有机器件的势垒电位和阱浓度的影响

IF 1.3

Advances in Materials Science Pub Date : 2020-12-01 DOI: 10.2478/adms-2020-0019

Sudipta Sen, N. Manik

{"title":"Effect of Different Sized Multi Walled Carbon Nanotubes on the Barrier Potential and Trap Concentration of Malachite Green Dye Based Organic Device","authors":"Sudipta Sen, N. Manik","doi":"10.2478/adms-2020-0019","DOIUrl":"https://doi.org/10.2478/adms-2020-0019","url":null,"abstract":"Abstract Present work shows effect of 8 nm diameter and 30 nm diameter multi walled carbon nanotubes (MWCNT) on the barrier potential and trap concentration of Malachite Green (MG) dye based organic device. MWCNTs are basically a bundle of concentric single-walled carbon nanotubes with different diameters. In this work, ITO coated glass substrate and aluminium have been used as front electrode and back electrode respectively and the spin coating method is used to prepare the MG dye based organic device. It has been observed that both barrier potential and trap concentration are in correlation. Estimation of both these parameters has been done from current-voltage characteristics of the device to estimate the trap energy and the barrier potential of the device. Device turn-on voltage or the transition voltage is also calculated by using current-voltage characteristics. In presence of 8 nm diameter MWCNT, the transition voltage is reduced from 3.9 V to 2.37 V, the barrier potential is lowered to 0.97 eV from 1.12 eV and the trap energy is lowered to 0.028 eV from 0.046 eV whereas incorporation of 30 nm diameter MWCNT shows reduction of transition voltage from 3.9 V to 2.71 V and a reduction of barrier potential and trap concentration from 1.12 eV to 1.03 eV and from 0.046 eV to 0.035 eV respectively. Presence of both 8 nm diameter and 30 nm diameter MWCNT lowers trap energy approximately to 39% and 24% respectively and lowers barrier potential approximately to 13% and 8% respectively. Estimation of barrier potential is also done by Norde method which shows lowering of the value from 0.88 eV to 0.79 eV and from 0.88 eV to 0.84 eV in presence of both 8 nm and 30 nm diameter multi walled carbon nanotubes respectively. Calculation of barrier potential from both the I-V characteristics and Norde method are in unison with each other. Indication of enhancement of charge flow in the device can be ascribed to the truncated values of barrier potential and trap energy.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74607052","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: 5

Welding Thermal Cycles of Joints Made of S1100QL Steel by Saw and Hybrid Plasma-Mag Processes S1100QL钢焊接接头的锯焊和等离子体磁复合焊接热循环

IF 1.3

Advances in Materials Science Pub Date : 2020-12-01 DOI: 10.2478/adms-2020-0023

A. Sajek

{"title":"Welding Thermal Cycles of Joints Made of S1100QL Steel by Saw and Hybrid Plasma-Mag Processes","authors":"A. Sajek","doi":"10.2478/adms-2020-0023","DOIUrl":"https://doi.org/10.2478/adms-2020-0023","url":null,"abstract":"Abstract The aim of this article is to validate the method of conducting a multipoint temperature measurement in the area of welded joints as a tool for quality assessment of the joints in question. In order to establish a relationship between temperature readout at a given point, the value of heat input and the distance of the point form the weld axis, preliminary tests have been conducted on a set of padding welds. Correlation of measurement data analysis showed the high 0.99 level. In the second stage of the study, temperatures of joints welded with two different methods have been measured: the HPAW (Hybrid Plasma – Arc Welding) and classic SAW (Submerged Arc Welding) method. The obtained temperature curves reflect the intensity of heat input in a given welding process. When compared to thermal effects on metallographic specimens, the shapes of the curves show a potential for quality assessment of joints in production conditions. Estimating thermal effects with classic analytical methods proves imprecise with respect to advanced high-power welding processes. Monitoring temperature will allow to assess the quality of joints in the course of welding, which may be a remarkable factor in terms of limiting the HAZ (heat affected zone) tempering of joints made from MART steels (advanced high strength martensitic steel) – a phenomenon that exceedingly decreases the strength of the joints. The method for quality assessment of welded joints presented in this paper allows to extend the analysis of welding thermal conditions.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76943037","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: 9