Materials Research Express最新文献_第2页

Prediction of Sm- (Co, Cu, Fe, Zr) binary alloys’ thermodynamic parameters by improved miedema model 用改进的米德玛模型预测 Sm-（Co、Cu、Fe、Zr）二元合金的热力学参数

IF 2.3 4区材料科学

Materials Research Express Pub Date : 2024-09-15 DOI: 10.1088/2053-1591/ad78b1

Zhi Zhu, Yikun Fang, Wei Wu, Bo Zhao, Jiashuo Zhang and Ming Lei

{"title":"Prediction of Sm- (Co, Cu, Fe, Zr) binary alloys’ thermodynamic parameters by improved miedema model","authors":"Zhi Zhu, Yikun Fang, Wei Wu, Bo Zhao, Jiashuo Zhang and Ming Lei","doi":"10.1088/2053-1591/ad78b1","DOIUrl":"https://doi.org/10.1088/2053-1591/ad78b1","url":null,"abstract":"Currently, the original Miedema mixing enthalpy model yields calculation results that exhibit some discrepancies when compared to experimental data. Therefore, improving the precision of the Miedema model is essential to advance its development and application in developing samarium–cobalt permanent magnet alloys. To address this issue, the enthalpies of mixing for Sm–(Co, Cu, Fe, Zr) binary alloys were calculated using the modified model. In addition, the mixing enthalpy (ΔH), excess entropy (SE), excess Gibbs free energy (GE), component activity (α) and binary Gibbs free energy of Sm–Co and Sm–Fe were calculated. The results indicate that the improved Miedema model more accurately matches the experimental values. Sm– (Co, Fe, Cu) binary alloys tend to form intermetallic compounds easily, whereas Sm–Zr does not. The ΔH, SE and GE of Sm-(Co, Fe) are negative, and the activity of each component shows a considerable negative deviation from Raoult’s law in contrast to that of an ideal solution. In the range of 1550 ∼ 1620 K, the Gibbs free energy of SmCo5 and Sm2Co17 reactions is negative with the Sm2Co17 phase being thermodynamically more stable than the SmCo5 phase.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"9 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigations on the machinability performance of Al2O3/TiCN CVD coated carbide tools in sustainable high-speed hard-turning of AISI 4340 alloy steel Al2O3/TiCN CVD 涂层硬质合金刀具在 AISI 4340 合金钢持续高速硬车削中的加工性能研究

IF 2.3 4区材料科学

Materials Research Express Pub Date : 2024-09-15 DOI: 10.1088/2053-1591/ad7657

Nabil Jouini, Saima Yaqoob and Jaharah A Ghani

{"title":"Investigations on the machinability performance of Al2O3/TiCN CVD coated carbide tools in sustainable high-speed hard-turning of AISI 4340 alloy steel","authors":"Nabil Jouini, Saima Yaqoob and Jaharah A Ghani","doi":"10.1088/2053-1591/ad7657","DOIUrl":"https://doi.org/10.1088/2053-1591/ad7657","url":null,"abstract":"This study investigates the effectiveness of CVD coated carbide inserts in turning hardened AISI 4340 steel at high-machining speed V = 300, 350 m min−1 under sustainable dry cutting environment. Experiments were executed in accordance to Taguchi L4 orthogonal array and crucial machinability aspects tool life, tool wear progression and mechanism, cutting force, and surface roughness were evaluated in detail. The results of this study revealed that Al2O3/TiCN coating successfully inhibited the faster progression of tool wear at low cutting speed (300 m min−1), feed rate (0.05 mm rev−1) and depth of cut (0.1 mm), thus delivering the highest tool life of 19.25 min and lowest cutting force of 76.8 N. However, better surface finish of 0.305 μm was obtained at high cutting speed (350 m min−1), low feed rate (0.05 mm rev−1), and high depth of cut (0.1 mm). Nevertheless, at high cutting speed (350 m min−1) and feed rate (0.1 mm rev−1), involvement of intense thermal-mechanical effects suppressed the effectiveness of coating and tool completed its useful life at 9.24 min. Severe flaking on the cutting edge was observed at high machining parameters. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analysis revealed that adhesion, oxidation, and small scale chipping and abrasion were the primary wear mechanisms attributing in competing the tool life criteria (Vb = 300 μm) in all cutting conditions. Furthermore, it was established that the cutting force and surface roughness increased with increasing tool flank wear due to coating delamination, material adhesion and tool chipping. This research emphasizes the significant potential of adopting Al2O3/TiCN coated carbide inserts for high-speed industrial hard-turning of AISI 4340 steel.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"3 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrasonic assisted removal of methyl orange and bovine serum albumin from wastewater using modified activated carbons: RSM optimization and reusability 利用改性活性碳超声波辅助去除废水中的甲基橙和牛血清白蛋白：RSM 优化和可重复使用性

IF 2.3 4区材料科学

Materials Research Express Pub Date : 2024-09-12 DOI: 10.1088/2053-1591/ad76fe

Imran Ahmad Khan, Asad Ullah Khan, Kashif Mairaj Deen, Edouard Asselin, Rehan Sadiq, Muhammad Yasir and Nasir M Ahmad

{"title":"Ultrasonic assisted removal of methyl orange and bovine serum albumin from wastewater using modified activated carbons: RSM optimization and reusability","authors":"Imran Ahmad Khan, Asad Ullah Khan, Kashif Mairaj Deen, Edouard Asselin, Rehan Sadiq, Muhammad Yasir and Nasir M Ahmad","doi":"10.1088/2053-1591/ad76fe","DOIUrl":"https://doi.org/10.1088/2053-1591/ad76fe","url":null,"abstract":"The removal of industrial pollutants from water remains a significant challenge in water treatment processes. This study investigated the efficacy of powder-activated carbon (PAC), thermally modified PAC (TPAC), and chemically modified PAC (CPAC) for removing bovine serum albumin (BSA) and methyl orange (MO) from simulated wastewater. After undergoing treatment, the BET surface area of TPAC increased to 823 m2 g−1, while that of CPAC increased to 657 m2 g−1 compared to the initial surface area of pristine PAC, which was 619 m2 g−1. Batch adsorption experiments assisted by ultrasonication were conducted to evaluate the impact of solution pH, initial concentration, and contact time on the adsorption capacities (qmax) of BSA and MO. TPAC demonstrated superior performance, achieving qmax values of 152 mg g−1 for MO and 133 mg g−1 for BSA, compared to PAC, which provided qmax values of 124 mg g−1 and 112 mg g−1, respectively. Furthermore, pH levels of 3 and 5 were identified as highly effective for the removal of MO and BSA from water, respectively. The adsorption kinetics of both MO and BSA followed pseudo2nd-order (R2 > 0.99) reaction kinetics under both batch and ultrasonic conditions, confirming the removal of contaminants through chemisorption. The adsorption trends also satisfied the Langmuir isothermal model, indicating the formation of a uniform monolayer during the adsorption process of these contaminants. To understand the simultaneous effect of all the variables, response surface methodology (RSM) using central composite design (CCD) was used to predict the adsorption capacities of CPAC. After five adsorption cycles, the removal efficiencies of MO (from 98% to 80%) and BSA (from 55% to 40%) decreased in the CPAC system. The results suggested that CPAC can be effectively utilized to remove MO from wastewater.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"2 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical and experimental study of temperature, residual stresses, and microstructural evolution on multi-layer and multi-pass laser cladding of 6061Al alloy 6061Al 合金多层多道激光熔覆的温度、残余应力和微结构演变的数值与实验研究

IF 2.3 4区材料科学

Materials Research Express Pub Date : 2024-09-12 DOI: 10.1088/2053-1591/ad7784

Weifeng Tang, Aoqi Liu, Chengyu Song and Li Zhou

{"title":"Numerical and experimental study of temperature, residual stresses, and microstructural evolution on multi-layer and multi-pass laser cladding of 6061Al alloy","authors":"Weifeng Tang, Aoqi Liu, Chengyu Song and Li Zhou","doi":"10.1088/2053-1591/ad7784","DOIUrl":"https://doi.org/10.1088/2053-1591/ad7784","url":null,"abstract":"Multi-layer and multi-pass laser cladding is a promising and important process for repairing and strengthening Al alloy parts, whereas the temperature and residual stresses have a great influence on the properties of the laser cladding layer. In this paper, a nonlinear transient thermo-mechanical coupling finite element model of multi-layer and multi-pass cladding of 6061Al alloy was established. Meanwhile, the DFLUX user subroutine was developed using Fortran code to define the movement of the three-dimensional heat source model. From there, the distribution and evolution of temperature and stresses at different times were investigated. In addition, the micro-morphology and micro-hardness after cladding were also analyzed in detail. The results show that both the maximum residual tensile and compressive stresses decrease with increasing the number of cladding passes. At the same time, due to the reheating effect of each cladding on the previous cladding, a few bubbles appear at the top, middle and bottom of the overlap surfaces. Moreover, the micro-hardness of the overlap surfaces decreases slightly. This study can provide a theoretical basis for further research into multi-layer and multi-pass laser cladding of 6061Al alloy.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"28 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of the discreteness correction in dislocation equations for sphalerite crystals 确定闪锌矿晶体位错方程中的离散性修正

IF 2.3 4区材料科学

Materials Research Express Pub Date : 2024-09-11 DOI: 10.1088/2053-1591/ad7656

Huili Zhang, Defang Lu and Yanyan Li

引用次数: 0

An experimental study on material removal rate and surface roughness of Cu-Al-Mn ternary shape memory alloys using CNC end milling 使用数控端铣加工铜-铝-锰三元形状记忆合金的材料去除率和表面粗糙度的实验研究

IF 2.3 4区材料科学

Materials Research Express Pub Date : 2024-09-11 DOI: 10.1088/2053-1591/ad76fc

Praveen N, Siddesh Kumar N G, C Durga Prasad, Manoj Kumar, Suryakant Kumar, H Hrishikesh, Saravana Bavan, Subramanya R Prabhu and Prakash Kumar

{"title":"An experimental study on material removal rate and surface roughness of Cu-Al-Mn ternary shape memory alloys using CNC end milling","authors":"Praveen N, Siddesh Kumar N G, C Durga Prasad, Manoj Kumar, Suryakant Kumar, H Hrishikesh, Saravana Bavan, Subramanya R Prabhu and Prakash Kumar","doi":"10.1088/2053-1591/ad76fc","DOIUrl":"https://doi.org/10.1088/2053-1591/ad76fc","url":null,"abstract":"This study investigates the impact of Computer Numerical Control (CNC) milling parameters on Cu-Al-Mn SMAs (Shape memory alloys) to evaluate the effects on Surface Roughness (SR) and Material Removal Rate (MRR). The primary variables examined comprise of cutting speed, feed rate, and depth of cut. Results indicate that the Shape Memory Effect (SME) is higher in Copper Aluminium Manganese (CAM 3) compared to CAM 1 and CAM 2, with SME improving from 3.5% to 5.5% as Manganese (Mn) content increases, reflecting an increase in dislocations within the metal’s crystal structure. Surface roughness increases with higher feed rates and depths of cut but decreases with increased cutting speed. MRR shows a positive correlation with feed rate, depth of cut, and cutting speed, though it decreases with higher Mn content. Notably, CAM 3 exhibits lower MRR compared to CAM 1 and CAM 2. Scanning Electron Microscopy (SEM) reveals that at lower feed rates (0.10 mm rev−1), the surface is smooth and free of ridges or feed marks, while at higher feed rates (0.18 mm rev−1), noticeable surface imperfections and plastic deformation occur. The addition of Mn improves surface smoothness and machinability, it also affects MRR. Further suggesting that Mn content and milling parameters significantly influence both the mechanical properties and machinability of Cu-Al-Mn SMAs respectively.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"21 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","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 machining performance of waspaloy using copper-graphite composite electrodes in electric discharge machining 在放电加工中使用铜-石墨复合电极对黄铜进行加工的性能研究

IF 2.3 4区材料科学

Materials Research Express Pub Date : 2024-09-11 DOI: 10.1088/2053-1591/ad7658

Priyanka Putta, Jayakumar V and Giridharan PK

{"title":"Investigation of machining performance of waspaloy using copper-graphite composite electrodes in electric discharge machining","authors":"Priyanka Putta, Jayakumar V and Giridharan PK","doi":"10.1088/2053-1591/ad7658","DOIUrl":"https://doi.org/10.1088/2053-1591/ad7658","url":null,"abstract":"This study endeavoured to investigate the machining of Waspaloy using Electric Discharge Machining (EDM), utilizing copper-graphite composites as the tool material. Given the limited existing research on machining Waspaloy with composite tools, this study aims to address this gap by employing a copper-graphite composite tool. In this work, pure copper electrode and three composite electrodes with varying graphite percentages in copper, viz. copper containing 5%, 10%, and 15% graphite (CuGr-5, CuGr-10, and CuGr-15), are utilized for experimentation. Composite electrodes are fabricated by the stir-casting process. The scanning electron microscope reveals that the graphite specks are homogeneously disseminated over the matrix material. The Taguchi mixed orthogonal array was used for developing experimental runs. By varying the current, polarity, pulse on and off times, tool materials, and gap, machining performance was measured in terms of Material Removal Rate (MRR), Tool Wear Rate (TWR), and Surface Roughness (Ra). It was observed that CuGr-5 provides an enhancement in MRR due to the improved electric conductivity, bridging effect, and increased energy concentration at the spark gap. Diverse characteristics witnessed on the surface morphology include black dots, globules, remelted layers, micro-cracks, and scratches. When machined with a CuGr5 electrode, the surface quality improved owing to the completed flushing and uniform distribution of generated heat as confirmed through worn surface morphology. The parameters were optimized utilizing the PROMETHEE optimization technique; it was found that the CuGr-5 electrode with the assessment value 0.02458 was optimal for machining of Waspaloy.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"21 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laser cladding technology for high entropy alloys: effect and applications 高熵合金激光熔覆技术：效果与应用

IF 2.3 4区材料科学

Materials Research Express Pub Date : 2024-09-10 DOI: 10.1088/2053-1591/ad75e8

Om Prakash, Rituraj Chandrakar, Martin L, Jagesvar Verma, Anil kumar and Ankur Jaiswal

{"title":"Laser cladding technology for high entropy alloys: effect and applications","authors":"Om Prakash, Rituraj Chandrakar, Martin L, Jagesvar Verma, Anil kumar and Ankur Jaiswal","doi":"10.1088/2053-1591/ad75e8","DOIUrl":"https://doi.org/10.1088/2053-1591/ad75e8","url":null,"abstract":"A multi-component category of an alloy containing very specific properties revolutionized the area of material science and the present engineering era. Laser cladding, a technique for surface coating, enhances surface quality and modifies properties using advanced coating technologies. In current trends, Laser cladding is mainly used in equipment and machine parts for enhancing surface properties, repairing damaged parts and surface coating caused by its advantages such as small heat-affected zone, low substrate damage, low dilution rate and exceptional metallurgical material bonding among coating and used substrate. Laser cladding improves substrates’ mechanical and various functional-specific properties, ensuring a high-quality balance between mechanical and surface attributes. The research society was able to investigate laser-cladding HEAs coatings because of the superior attributes of HEAs compared to ordinary alloys. This paper reviews current developments in laser-cladding HEAs coatings and the application of laser-cladding technology to HEAs materials. The laser cladding high-entropy alloy coatings have potential applications in corrosion, wear, and oxidation resistance, as well as their respective substrates. Cladded coatings composed of HEAs materials are measured to have shown potential applications in recent technology, opening exciting possibilities for the future. The study also discusses current trends and future prospects.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"10 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Relative molecular orientation can impact the onset of plasticity in molecular crystals 相对分子取向会影响分子晶体塑性的开始

IF 2.3 4区材料科学

Materials Research Express Pub Date : 2024-09-09 DOI: 10.1088/2053-1591/ad755f

Hugh P Grennan, Alexandra C Burch and David F Bahr

{"title":"Relative molecular orientation can impact the onset of plasticity in molecular crystals","authors":"Hugh P Grennan, Alexandra C Burch and David F Bahr","doi":"10.1088/2053-1591/ad755f","DOIUrl":"https://doi.org/10.1088/2053-1591/ad755f","url":null,"abstract":"Creating or moving dislocations is the first step to dissipating mechanical energy via plastic deformation under contact loading. In molecular crystals there is both a lattice that defines crystal orientation and a relative orientation of the basis of the molecules. We define a normalization parameter which relates strain at yield, the hardness of the bulk crystal, and a distance parameter analogous to a Burgers vector that nominally predicts the relative ease of initiating plasticity in this broad class of materials. Analyzing the yield behavior of 10 different molecular crystals of varying space groups shows the inter-molecular orientation predicts the experimentally observed applied stress needed to nucleate dislocations. When molecules are oriented ‘parallel’ relative to one another the normalized maximum shear stress at the onset of plasticity is on the order of 3–5 times lower than when molecules within the crystal are ‘anti-parallel’, and molecules with a more equiaxed shape fall in between these bounds. This provides an initial indication of a structural feature which predicts the relative ease of initiating plasticity during contact loading in molecular crystals.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"33 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of different corrugated rolls on the performance of BTW1/Q345R composite plate 不同波纹辊对 BTW1/Q345R 复合板性能的影响

IF 2.3 4区材料科学

Materials Research Express Pub Date : 2024-09-09 DOI: 10.1088/2053-1591/ad766b

Pengtao Liu, Ke Wang, Chenchen Zhi, Guanghui Zhao, Lifeng Ma, Xiangyu Gao, Aifeng Li and Lianwei Ma

引用次数: 0