Materials Research-ibero-american Journal of Materials最新文献_第7页

Thermomechanical Simulation of Heat-Affected Zones in Nickel-Free High Nitrogen Stainless Steel: Microstructural Evolution and Mechanical Property Studies 无镍高氮不锈钢热影响区的热力学模拟:组织演变与力学性能研究

IF 1.7 4区材料科学

Materials Research-ibero-american Journal of Materials Pub Date : 2023-03-24 DOI: 10.1590/1980-5373-mr-2022-0401

Dhanasekar Ramalingam, Balusamy Veerappagounder, Sivasankari Rangaswamy

{"title":"Thermomechanical Simulation of Heat-Affected Zones in Nickel-Free High Nitrogen Stainless Steel: Microstructural Evolution and Mechanical Property Studies","authors":"Dhanasekar Ramalingam, Balusamy Veerappagounder, Sivasankari Rangaswamy","doi":"10.1590/1980-5373-mr-2022-0401","DOIUrl":"https://doi.org/10.1590/1980-5373-mr-2022-0401","url":null,"abstract":"Three different Heat Affected Zones (HAZ) in hot rolled Nickel Free High Nitrogen Stainless Steels (NFHNSS) based on three different peak temperatures were physically simulated using Gleeble Simulator to investigate microstructural evolution and structure-property correlation. Optical microscopy revealed that the austenite grains are recrystallized in the simulated heat affected zone in the peak temperature range of 750 o C to 1050 o C. Extent of recrystallization of grains and nucleation of precipitates varied with peak temperatures. TEM characterization showed the presence of Cr 2 N precipitate having an average particle size in the range of 300 nm to 395 nm in the simulated HAZ were confirmed by Selected Area Electron Diffraction (SAED) analysis. Precipitation kinetics of Cr 2 N were simulated using Thermo-Calc were found to correlate well with experimental values. Mechanical properties of specimens taken from three different HAZ were evaluated for tensile strength and hardness. Variation in strength of the different specimens has been discussed using various strengthening models. Fractography analysis was also carried out to understand the effect of peak temperature on fracture behaviour. Transition in fracture patterns in NFHNSS from ductile to mixed mode was observed for different specimens.","PeriodicalId":18331,"journal":{"name":"Materials Research-ibero-american Journal of Materials","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67302803","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

Quantitative Metallographic Parameters to Describe Microstructures of Multiphase Materials 描述多相材料微观组织的定量金相参数

IF 1.7 4区材料科学

Materials Research-ibero-american Journal of Materials Pub Date : 2023-03-10 DOI: 10.1590/1980-5373-mr-2022-0476

A. Alves, W. L. Assis, P. R. Rios

{"title":"Quantitative Metallographic Parameters to Describe Microstructures of Multiphase Materials","authors":"A. Alves, W. L. Assis, P. R. Rios","doi":"10.1590/1980-5373-mr-2022-0476","DOIUrl":"https://doi.org/10.1590/1980-5373-mr-2022-0476","url":null,"abstract":"One typically characterizes the transformation kinetics of a parent phase, α, into a single phase, β, by measuring the volume fraction transformed, V V β , against time. Sometimes one also reports the interfacial area density between the new and the parent phase, V S αβ , against the volume fraction transformed. V S αβ is a dynamic interface. It migrates as the growth of the new phase takes place. Interfaces between transformed phases might be called static interfaces. These may be present before transformation starts, for example, grain boundaries of a polycrystalline parent phase. Alternatively, static interfaces, , V S ββ , may appear during the transformation because of impingement. Therefore, one may better understand the microstructural evolution following the behavior of the volume fraction, dynamic and static interfaces. A more complicated situation occurs if the parent phase transforms into two or more product phases, for example, α→β,γ. In this work, we apply parameters to describe the transformation of a parent phase into a single phase, the contiguity and the dispersion, to the situation in which the parent phase transforms into two or more phases. We tested these parameters against computer simulations and concluded that they combine a good description of the behavior of the simulated transformations and simplicity","PeriodicalId":18331,"journal":{"name":"Materials Research-ibero-american Journal of Materials","volume":"47 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67303128","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

A Strength Behavior Approach for 3Y-TZP Ceramics Dental Implants Based on Finite Element Simulations 基于有限元模拟的3Y-TZP陶瓷牙种植体强度行为研究

IF 1.7 4区材料科学

Materials Research-ibero-american Journal of Materials Pub Date : 2023-03-03 DOI: 10.1590/1980-5373-mr-2022-0110

P. A. Ward, Fernando Araújo da Costa Ward, Thielly Machareth Ward, C. Santos, R. Freitas, L. P. Moreira

{"title":"A Strength Behavior Approach for 3Y-TZP Ceramics Dental Implants Based on Finite Element Simulations","authors":"P. A. Ward, Fernando Araújo da Costa Ward, Thielly Machareth Ward, C. Santos, R. Freitas, L. P. Moreira","doi":"10.1590/1980-5373-mr-2022-0110","DOIUrl":"https://doi.org/10.1590/1980-5373-mr-2022-0110","url":null,"abstract":"This study is based on the numerical simulation of the mechanical response of yttrium-stabilized zirconia ceramic (3Y-TZP) dental implants as a function of their intrinsic geometry and masticatory loads. Samples (n=20) of 3Y-TZP ceramics were compacted, sintered at 1500 °C - 2h, and characterized by relative density, X-Ray diffraction (XRD), and scanning electron microscopy (SEM). The elastic parameters (modulus of elasticity and Poisson ratio), used in the numerical simulations, were measured by the Impulse Excitation Technique, and the bending strength was obtained using piston-on-three-balls testing. An authorial implant design and, comparatively, commercial implant CAD models were used in this study as an initial geometry of dental implant in a typical adult mandible anatomy. From CAD and CAE techniques, finite element models were generated for all implant geometries. Loading cases were considered based on different intensities (100N to 500N) and orientation angles (45° or 90°) to reproduce the human masticatory efforts. The numerical predictions were compared with finite element simulations of gold-standard titanium-based implants. The investigated 3Y-TZP sintered ceramics presented high densification (> 99%), with a microstructure formed by submicron equiaxed tetragonal zirconia grains. The 3Y-TZP average bending strength obtained from piston-on-three-balls testing is 1192 ± 99 MPa. For both dental implant geometries, the zirconia implants showed average strength of less than 550 MPa, which, in turn, is independent of the masticatory load value or orientation angle. All finite element predictions are 50% inferior to the corresponding measured flexural strength values and preliminarily enable the 3Y-TZP ceramics for dental implant applications without fracture risk.","PeriodicalId":18331,"journal":{"name":"Materials Research-ibero-american Journal of Materials","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67300704","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

Surface Microstructure Refinement and Mechanical Properties of GCr15 Steels Improved During Ultrasonic Surface Rolling Processing 超声表面轧制改善GCr15钢的表面组织和力学性能

4区材料科学

Materials Research-ibero-american Journal of Materials Pub Date : 2023-02-27 DOI: 10.1590/1980-5373-mr-2022-0606

Xianmeng Xue, Shubo Xu, Xiquan Ma, JuanJuan Han, Wei Zheng

引用次数: 1

Kinetic and Viscoelastic Study of Liquid Thermoplastic Matrix Based on Methyl Methacrylate Copolymers 基于甲基丙烯酸甲酯共聚物的液体热塑性基质的动力学和粘弹性研究

IF 1.7 4区材料科学

Materials Research-ibero-american Journal of Materials Pub Date : 2023-02-27 DOI: 10.1590/1980-5373-mr-2021-0619

D. C. Silveira, T. Braga, L. Conejo, Antonio Carlos Ancelotti Junior, M. L. Costa, E. C. Botelho

{"title":"Kinetic and Viscoelastic Study of Liquid Thermoplastic Matrix Based on Methyl Methacrylate Copolymers","authors":"D. C. Silveira, T. Braga, L. Conejo, Antonio Carlos Ancelotti Junior, M. L. Costa, E. C. Botelho","doi":"10.1590/1980-5373-mr-2021-0619","DOIUrl":"https://doi.org/10.1590/1980-5373-mr-2021-0619","url":null,"abstract":"The industries that have polymers as an important raw material in their production, such as the construction, automotive, electrical and electronic sectors, always seek innovations to cut costs, reduce weight, easiness of processing, maximizing mechanical properties, and recyclability. In this context, this work presents the study of the kinetic parameters and viscoelastic behavior of a new thermoplastic system initially liquid. Through differential scanning calorimetry (DSC) analysis, Brookfield viscosimetry; dynamic-mechanical analysis (DMA) and mathematical modeling with consolidated and standardized methods, it was possible to evaluate the polymerization kinetics and viscoelastic behavior of the material in solutions with different concentrations. The generated equations allow the prediction of the kinetic and gelation behavior of the material reducing the need for laboratory tests to determine polymer properties. The found results showed that concentrations of benzoyl peroxide initiator with 1wt% in the methyl methacrylate (MMA) copolymer solution have the best viscoelastic and dynamic-mechanical properties with a less expensive polymerization cycle.","PeriodicalId":18331,"journal":{"name":"Materials Research-ibero-american Journal of Materials","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67299978","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

Effect of the Characteristics of Maleic Anhydride-Grafted Polypropylene (MAPP) Compatibilizer on the Properties of Highly Filled (85%) Kenaf-Polypropylene Composites 马来酸酐接枝聚丙烯(MAPP)增容剂特性对高填充(85%)红麻-聚丙烯复合材料性能的影响

IF 1.7 4区材料科学

Materials Research-ibero-american Journal of Materials Pub Date : 2023-02-27 DOI: 10.1590/1980-5373-mr-2022-0428

A. Sanadi, Wolfgang Stelte

引用次数: 1

Effects of Argon Partial Pressure Variations on Wettability and Anti-icing Characteristics of Aluminum Doped ZnO Thin Films 氩气分压变化对铝掺杂ZnO薄膜润湿性和抗结冰特性的影响

IF 1.7 4区材料科学

Materials Research-ibero-american Journal of Materials Pub Date : 2023-02-13 DOI: 10.1590/1980-5373-mr-2022-0339

Nicky P. Patel, K. Chauhan

{"title":"Effects of Argon Partial Pressure Variations on Wettability and Anti-icing Characteristics of Aluminum Doped ZnO Thin Films","authors":"Nicky P. Patel, K. Chauhan","doi":"10.1590/1980-5373-mr-2022-0339","DOIUrl":"https://doi.org/10.1590/1980-5373-mr-2022-0339","url":null,"abstract":"When ice forms on solid surfaces, it can cause issues in many different sectors (aircraft, electricity lines, etc.). Surfaces and coatings with hydrophobic qualities may be used in anti-icing applications. The purpose of this work is to utilize RF Magneton Sputtering to deposit AZO thin coatings, which will slow the accumulation of ice on the surface. The effects of changes in argon partial pressure on the anti-icing, wettability, optical, and structural properties of the resulting thin films have been experimentally investigated. X-ray diffraction demonstrated a (002) peak of ZnO, the intensity of the peak diminishes with an increase in partial pressure. The band gap was measured to be between 2.98 and 3.15 eV, and the average maximum transmittance was observed to be around 82% for 50% partial pressure and 71% for 33% partial pressure, confirming the transparency of the thin films. Wettability studies revealed that the films are hydrophobic with a maximum contact angle of 127.5°, which was deposited at lower partial pressure. Films deposited at 33% partial pressure delayed the formation of ice on the surface by 4.5 folds when compared to an uncoated substrate.","PeriodicalId":18331,"journal":{"name":"Materials Research-ibero-american Journal of Materials","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67302191","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: 2

Wear Behavior Prediction for Cu/TiO2 Nanocomposite Based on Optimal Regression Methods 基于最优回归方法的Cu/TiO2纳米复合材料磨损行为预测

IF 1.7 4区材料科学

Materials Research-ibero-american Journal of Materials Pub Date : 2023-02-13 DOI: 10.1590/1980-5373-mr-2022-0263

D. Saber, Ibrahim B. M. Taha, K. A. El-Aziz

{"title":"Wear Behavior Prediction for Cu/TiO2 Nanocomposite Based on Optimal Regression Methods","authors":"D. Saber, Ibrahim B. M. Taha, K. A. El-Aziz","doi":"10.1590/1980-5373-mr-2022-0263","DOIUrl":"https://doi.org/10.1590/1980-5373-mr-2022-0263","url":null,"abstract":"The present study investigated the effects of the addition of the TiO 2 nanoparticles with different weight percent on the copper nanocomposites’ abrasive wear behavior. In addition, optimal machine learning regression (OMLR) methods are used to detect the copper nanocomposites’ abrasive wear behavior. The powder metallurgy method is used to fabricate the Cu/TiO 2 nanocomposite specimens with 0, 4, 8, 12 wt% TiO 2 . The abrasive wear behavior of fabricated specimens is evaluated experimentally using a pin on the desk apparatus. The abrasive wear results are used to predict the abrasive wear behavior of the fabricated composites using OMLR methods. OMLR methods are implemented and carried out using MATLAB/software. The OMLR methods use the input parameters of TiO 2 , sliding distance and load, and the weight loss due to abrasive wear as an output to build their optimal models. OMLR methods were successfully detected with small errors, especially GPR methods. The results of the proposed GPR were compared with those obtained from the ANN model with the efficacy of the GPR model. The experimental results demonstrated that the weight loss in test specimens decreased with increasing wt% of TiO 2 addition. This reflected improvements in the wear resistance of copper nanocomposites compared to pure copper","PeriodicalId":18331,"journal":{"name":"Materials Research-ibero-american Journal of Materials","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67301890","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

Effect of Aging Temperature on Plastic Flow Behaviour and Toughness of Nickel Free High Nitrogen Austenitic Stainless Steels 时效温度对无镍高氮奥氏体不锈钢塑性流动性能和韧性的影响

IF 1.7 4区材料科学

Materials Research-ibero-american Journal of Materials Pub Date : 2023-02-10 DOI: 10.1590/1980-5373-mr-2022-0397

K. Krishna Kumar, J. Anburaj, R. Subramanian

{"title":"Effect of Aging Temperature on Plastic Flow Behaviour and Toughness of Nickel Free High Nitrogen Austenitic Stainless Steels","authors":"K. Krishna Kumar, J. Anburaj, R. Subramanian","doi":"10.1590/1980-5373-mr-2022-0397","DOIUrl":"https://doi.org/10.1590/1980-5373-mr-2022-0397","url":null,"abstract":"In the present study, tensile properties, plastic flow behaviour and impact toughness of Nickel free High Nitrogen Austenitic Stainless Steels (NFHNSS) were evaluated under solution annealed and aged condition (at 700 o C, 800 o C and 900 o C for 14 hours). Plastic flow behaviour was analyzed using Holloman and Ludwigson flow equations. Samples in solution annealed and aged conditions exhibited a flow transition behaviour. Ludwigson flow equation produces best fit for flow transition behaviour. Transmission Electron Microscope (TEM) investigations of NFHNSS samples after tensile test revealed dislocation network and planar arrangement of dislocations adjancent to Grain Boundaries (GB) in the solution annealing and aged conditions respectively. Plastic deformation of NFHNSS occurs by a combination of planar glide and twinning. Impact energy was significantly higher in solution annealed condition than aged condition. Impact energy values decreased with increasing aging temperature. Precipitation and growth as well as morphology of Cr 2 N at the GBs reduce the impact energy values significantly. Presence of larger precipitates readily pull out from GB easily than smaller precipitates at low temperatures. Large precipitate, at the GB’s readily pull out at low temperature, compared to slower ones.","PeriodicalId":18331,"journal":{"name":"Materials Research-ibero-american Journal of Materials","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67302827","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

Adsorption of Glyphosate by Palygorskite 坡缕石对草甘膦的吸附

IF 1.7 4区材料科学

Materials Research-ibero-american Journal of Materials Pub Date : 2023-02-06 DOI: 10.1590/1980-5373-mr-2022-0335

Patricia Viana Rodrigues, F.A.N.G. Silva, F. Pontes, C. N. Barbato, V. G. Teixeira, Tainara Cristina de Assis, V. S. Brandão, L. Bertolino

引用次数: 2