Journal of Materials Research and Technology-Jmr&t最新文献_第9页

Advancing conductivity modeling: A unified framework for polymer carbon black nanocomposites

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-03-12 DOI: 10.1016/j.jmrt.2025.03.104

Yasser Zare , Muhammad Naqvi , Kyong Yop Rhee , Soo-Jin Park

{"title":"Advancing conductivity modeling: A unified framework for polymer carbon black nanocomposites","authors":"Yasser Zare , Muhammad Naqvi , Kyong Yop Rhee , Soo-Jin Park","doi":"10.1016/j.jmrt.2025.03.104","DOIUrl":"10.1016/j.jmrt.2025.03.104","url":null,"abstract":"<div><div>Although numerous experimental data on the conductivity of polymer carbon black (CB) nanocomposites (PCBs) have been reported, the modeling approaches remain incomplete and require further attention. This article proposes a simplified model for predicting the PCB electrical conductivity, incorporating key parameters such as CB radius (<em>R</em>), tunneling distance (<em>λ</em>), contact diameter (<em>d</em>), interphase depth, network percentage, and interfacial tension between CB and polymer. Experimental PCB conductivity data and parametric evaluations are utilized to validate the proposed model. The proposed model predicts that the thinnest and widest tunnels (<em>λ</em> = 2 nm and <em>d</em> = 30 nm) attain a maximum conductivity of 5.5 S/m. However, tunnels bigger than 4 nm cannot enhance the conductivity. Additionally, increasing the concentration of the smallest CBs (<em>R</em> = 10 nm) to 10 vol% boosts PCB conductivity to 4.9 S/m, whereas low concentrations (<5 vol%) of larger CBs (<em>R</em> > 17 nm) have negligible effect. These findings underscore the critical roles of tunneling dimensions together with CB size and concentration in the conductivity of this system.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 26-33"},"PeriodicalIF":6.2,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Steady states in severe plastic deformations and microstructure at normal and high pressure

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-03-12 DOI: 10.1016/j.jmrt.2025.03.060

Valery I. Levitas

{"title":"Steady states in severe plastic deformations and microstructure at normal and high pressure","authors":"Valery I. Levitas","doi":"10.1016/j.jmrt.2025.03.060","DOIUrl":"10.1016/j.jmrt.2025.03.060","url":null,"abstract":"<div><div>The main fundamental problem in studying plasticity and microstructure evolution is that they depend on five components of the plastic strain tensor <strong><em>ε</em></strong><sub><em>p</em></sub>, its entire path <span><math><mrow><msubsup><mi>ε</mi><mi>p</mi><mrow><mspace></mspace><mi>p</mi><mi>a</mi><mi>t</mi><mi>h</mi></mrow></msubsup></mrow></math></span>, and pressure <em>p</em> and its path <em>p</em><sup><em>path</em></sup>, which leaves little hope of finding some general laws, especially at severe plastic straining and high pressures. Here, we review the validity of the following hypothesis for quasi-static material behavior after some critical level of cold severe plastic strain and some straining paths: initially isotropic polycrystalline materials behave like perfectly plastic, isotropic, and strain-path-independent with the corresponding limit surface of perfect plasticity and reach steady values of the crystallite/grain size and dislocation density, which are strain- and strain-path-independent. However, there are multiple steady microstructural states and corresponding limit surfaces of perfect plasticity. The main challenge is to find for which classes of loading paths <span><math><mrow><msubsup><mi>ε</mi><mi>p</mi><mrow><mspace></mspace><mi>p</mi><mi>a</mi><mi>t</mi><mi>h</mi></mrow></msubsup></mrow></math></span> and <em>p</em> <sup><em>path</em></sup> material behaves along the same limit surface of perfect plasticity and steady microstructural state and for which loading paths <span><math><mrow><msubsup><mi>ε</mi><mi>p</mi><mrow><mspace></mspace><mi>p</mi><mi>a</mi><mi>t</mi><mi>h</mi></mrow></msubsup></mrow></math></span> and <em>p</em><sup><em>path</em></sup> there is a jump to the different limit surface of perfect plasticity and steady microstructural state. Various experimental, computational, and coupled experimental-computational techniques are analyzed, and some controversies and challenges are summarized.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 382-397"},"PeriodicalIF":6.2,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Horizontal rotating arc narrow-gap GTAW of thick Ti–6Al–4V alloy

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-03-12 DOI: 10.1016/j.jmrt.2025.03.101

Kan Li , Chuanbao Jia , Peidun Chen , Jiakun Hu , Zhuo Wei , Qingye Zheng , Yinggang Wang , Chuansong Wu

{"title":"Horizontal rotating arc narrow-gap GTAW of thick Ti–6Al–4V alloy","authors":"Kan Li , Chuanbao Jia , Peidun Chen , Jiakun Hu , Zhuo Wei , Qingye Zheng , Yinggang Wang , Chuansong Wu","doi":"10.1016/j.jmrt.2025.03.101","DOIUrl":"10.1016/j.jmrt.2025.03.101","url":null,"abstract":"<div><div>The horizontal welding method helps simplify assembly and construction for large cylindrical components. Nonetheless, a notable challenge arises during horizontal welding, as the molten pool tends to flow downward due to gravity. To overcome this problem, a novel horizontal rotating-arc narrow-gap GTAW method has been implemented. The rotating arc promotes the flow of the molten metal and counteracts part of the gravity acting on the molten pool when the arc force is applied below it. This suppresses the sagging trend of the molten pool and improves weld formation, ultimately resulting in well-formed and defect-free welded joints. This innovative technique successfully welded horizontally 50 mm thick Ti–6Al–4V alloy plates. During the welding process of the dual-phase titanium alloy, the high-temperature β phase develops in the weld zone (WZ). Columnar crystals are retained with the cooling of the weld and grow epitaxially under the continuous heating and remelting of the subsequent weld. Within the columnar crystals, α′ martensite interlaces with the residual β phase and forms a basketweave structure. The proportion of low-angle grain boundaries and the average Kernel Average Misorientation values of the weld zone are lower than those of the base metal. Benefiting from the martensitic strengthening effect, the tensile strength of the WZ increased by 16.9 % compared to the base metal. The tensile properties exhibit good consistency across the full thickness of the joints. The impact toughness of the WZ is significantly improved, especially showing excellent low-temperature impact toughness at 0 °C.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 369-381"},"PeriodicalIF":6.2,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A comparative study on time-dependent corrosion properties of Ti–B–N films applied by PACVD method

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-03-12 DOI: 10.1016/j.jmrt.2025.03.097

Meisam Mahdavi , Amir Abdollah-Zadeh , Hassan Elmkhah

{"title":"A comparative study on time-dependent corrosion properties of Ti–B–N films applied by PACVD method","authors":"Meisam Mahdavi , Amir Abdollah-Zadeh , Hassan Elmkhah","doi":"10.1016/j.jmrt.2025.03.097","DOIUrl":"10.1016/j.jmrt.2025.03.097","url":null,"abstract":"<div><div>This study explores the time-dependent corrosion properties of titanium-boron-nitride (Ti–B–N) film applied through a pulsed-direct current plasma-assisted chemical vapor deposition (PACVD) method, comparing their performance with traditional titanium nitride (TiN) and titanium diboride (TiB<sub>2</sub>) films. The results revealed the nanocomposite structure of Ti–B–N film, characterized by a non-uniform atomic arrangement and irregular atomic distribution of amorphous BN surrounding the TiN nanocrystals. Electrochemical evaluations in a 3.5 wt% NaCl solution revealed that after 96 h of immersion, the Ti–B–N films had a charge transfer resistance (R<sub>ct</sub>) of 15980 Ω cm<sup>2</sup>, significantly outperforming TiN at 2755 Ω cm<sup>2</sup> and TiB<sub>2</sub> at 2593 Ω cm<sup>2</sup>. The corrosion current density (i<sub>corr</sub>) for Ti–B–N was measured at 0.193 μA/cm<sup>2</sup>, indicating enhanced corrosion resistance compared to 0.413 μA/cm<sup>2</sup> for TiN and 0.548 μA/cm<sup>2</sup> for TiB<sub>2</sub>. The remarkable corrosion resistance of the Ti–B–N film is ascribed to its low surface roughness (R<sub>a</sub> = 0.1 μm), optimal thickness (875 nm), and dense nanocomposite architecture.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 80-97"},"PeriodicalIF":6.2,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning-driven analysis of erosion resistance in ZrSiO4/Al2O3 reinforced A356 hybrid composites: Integration of CART algorithm with Taguchi optimization

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-03-12 DOI: 10.1016/j.jmrt.2025.03.107

T Satish Kumar , S. Shalini , Jana Petrů , M.K. Mishra , N. Jeyaprakash , Kanak Kalita

{"title":"Machine learning-driven analysis of erosion resistance in ZrSiO4/Al2O3 reinforced A356 hybrid composites: Integration of CART algorithm with Taguchi optimization","authors":"T Satish Kumar , S. Shalini , Jana Petrů , M.K. Mishra , N. Jeyaprakash , Kanak Kalita","doi":"10.1016/j.jmrt.2025.03.107","DOIUrl":"10.1016/j.jmrt.2025.03.107","url":null,"abstract":"<div><div>Aluminum alloy A356 has been increasingly important in the production of aircraft wings and fuselage skins in recent years, primarily because of its lightweight nature and specialized strength characteristics. This study aims to produce and investigate the erosion resistance of A356 hybrid composites by incorporating reinforcements such as zirconium silicate (ZrSiO<sub>4</sub>) and aluminium oxide (Al<sub>2</sub>O<sub>3</sub><strong>)</strong> using the Stir Casting Process (SCP) technology. Microhardness tests were performed on different combinations of dual reinforcement to evaluate the erosion resistance of the specimen with the highest microhardness value. The erosion performance of this rigid sample is quantified under parameters such as jet angle, jet pressure, jet distance, mesh number of erodent and impinging duration. These parameters were optimized using the Taguchi technique, and their contributions were analyzed using ANOVA. Additionally, CART regression analysis was employed to predict the erosion rates and evaluate the relative importance of erosion parameters. Confirmation tests conducted on optimized parameters validated both models, with the regression model showing superior accuracy (average error 0.34 %) compared to the CART model (average error 1.18 %). CART results highlight the jet angle and erodent mesh number as the most significant predictors of erosion rate, with jet angle contributing 100 % and mesh number contributing 24.2 % to model performance. Surface morphology analysis revealed less deterioration in terms of grain refinement and uniform reinforcement particle distribution compared to the base A356 matrix.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 157-172"},"PeriodicalIF":6.2,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143636466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the formation mechanism and morphology of edge burrs in radial fly-cutting of triangular pyramid microstructures

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-03-11 DOI: 10.1016/j.jmrt.2025.03.091

Yu Lei , Jiashun Gao , Zhilong Xu , Bicheng Guo , Maomao Wang , Wenbin Zhong , Wenhan Zeng , Xipeng Xu

{"title":"Study on the formation mechanism and morphology of edge burrs in radial fly-cutting of triangular pyramid microstructures","authors":"Yu Lei , Jiashun Gao , Zhilong Xu , Bicheng Guo , Maomao Wang , Wenbin Zhong , Wenhan Zeng , Xipeng Xu","doi":"10.1016/j.jmrt.2025.03.091","DOIUrl":"10.1016/j.jmrt.2025.03.091","url":null,"abstract":"<div><div>The triangular pyramid microstructures (TPM) have been widely applied in the optical field due to its excellent optical properties, such as refraction and reflection. However, the burrs generated during radial fly-cutting (RFC) will have an adverse effect on product performance. To address this issue, the formation mechanism of edge burrs in TPM is deeply analyzed, and RFC experiments are carried out. By adopting the orthogonal experimental method, the influence of processing parameters on the morphology and size of the edge exit burrs is systematically studied. The results indicate that the formation of edge exit burrs is caused by the plastic lateral flow phenomenon of the material in this region. Additionally, the adhesion of chips that have not been promptly separated from the workpiece further increases burr size. The edge exit burrs can be classified into four types: flaky curled burrs, blocky burrs, slim strip burrs, and filiform (thread-like) burrs. As for the two experimental indicators of the edge exit burr projection area and thickness, the main and secondary influencing factors are cutting depth, fly-cutting speed and feed speed. The projection area and thickness of the burrs decrease with the increase of fly-cutting speed, while they increase with higher feed speeds and finer cutting depths. Based on these findings, the optimized processing parameters are determined as follows: fly-cutting speed of 16.76 m/s, feed speed of 10 mm/min, and fine cutting depth of 2 μm. This study provides valuable insights for minimizing burrs and optimizing subsequent deburring processes.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 727-735"},"PeriodicalIF":6.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural evolution and precipitation behavior of titanium diboride-reinforced 7075Al composites during multi-pass rolling

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-03-11 DOI: 10.1016/j.jmrt.2025.03.066

Mengying Zhu , Zhefeng Xu , Ruidong Yang , Mingteng Wei , Satoshi Motozuka , Jianglong Gu , Gen Sasaki , Jinku Yu

{"title":"Structural evolution and precipitation behavior of titanium diboride-reinforced 7075Al composites during multi-pass rolling","authors":"Mengying Zhu , Zhefeng Xu , Ruidong Yang , Mingteng Wei , Satoshi Motozuka , Jianglong Gu , Gen Sasaki , Jinku Yu","doi":"10.1016/j.jmrt.2025.03.066","DOIUrl":"10.1016/j.jmrt.2025.03.066","url":null,"abstract":"<div><div>In this study, titanium diboride (TiB<sub>2</sub>)-reinforced 7075Al matrix composites with a bimodal structure were prepared by spark plasma sintering combined with multi-pass rolling. Structural evolution and precipitation behavior of interfacial micro-zones during multi-pass rolling were systematically studied. The results showed well bonding of the TiB<sub>2</sub>/Al interfaces within sintered and rolled composites. After 50 % rolling deformation, the interfacial micro-zones mainly consisted of precipitated η′ and coarse η phases. The combined effect of mismatch dislocations, strain differences, and solute-rich atomic regions at the semi-coherent TiB<sub>2</sub>/Al interface promoted local precipitation behavior of interfacial micro-zones during rolling, causing the density of the precipitated phases in the interfacial micro-zones to be higher than that in the matrix region. With the increase in rolling deformation, the strain in the interfacial micro-zone and the thickness of the solute-rich atomic region decreased continuously, while the density and homogeneity of the precipitated phases increased simultaneously. The composites exhibited bimodal structural features with the highest back stress and geometrically necessary dislocation density after 85 % deformation in multi-pass rolling, and the generation of bimodal structures was primarily related to the competition between the driving force of strain storage energy for grain growth and the inhibiting force of TiB<sub>2</sub> on grain boundary migration.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 46-61"},"PeriodicalIF":6.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research of twist-bend forming and performance control of titanium alloy wide-chord hollow fan blade under elevated temperature

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-03-11 DOI: 10.1016/j.jmrt.2025.03.076

Rui Feng , Minghe Chen , Hongrui Dong , Lansheng Xie , Jindong Ouyang

{"title":"Research of twist-bend forming and performance control of titanium alloy wide-chord hollow fan blade under elevated temperature","authors":"Rui Feng , Minghe Chen , Hongrui Dong , Lansheng Xie , Jindong Ouyang","doi":"10.1016/j.jmrt.2025.03.076","DOIUrl":"10.1016/j.jmrt.2025.03.076","url":null,"abstract":"<div><div>A unified viscoplastic constitutive model was established to predict the microstructure and damage evolution of diffusion bonded (DB) titanium alloy during the hot twist-bend forming based on the results of elevated temperature uniaxial tensile experiments. The influence of physical internal variables were considered by the viscoplastic model, which uses a genetic algorithm to optimize the parameters. Then, Abaqus and its subroutine Vumat were used to simulate the evolution of grain size, dynamic recrystallization (DRX) fraction, and damage evolution of titanium alloy hollow fan blades during hot stamping. By comparing the simulation results with the experimental results, the application of the unified viscoplastic model is proved to be reliable. Finally, the fan blade body manufactured by twist-bend forming under the process of Part-800-10-6 is smooth, without surface defects, and forming quality is better. The research results can provide guidance for the mass manufacturing of TC4 titanium alloy wide-chord hollow fan blades.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 300-314"},"PeriodicalIF":6.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143641734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cooling rate control combined with refractory Mo and/or V addition to enhance the mechanical properties of CoCrFeMnNi alloy

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-03-11 DOI: 10.1016/j.jmrt.2025.03.074

S. González , C.G. Garay-Reyes , A. Martínez-García , Konda Gokuldoss Prashanth , M.A. Ruiz-Esparza-Rodríguez , A. Hurtado-Macías , J. Eckert , R. Martínez-Sánchez

{"title":"Cooling rate control combined with refractory Mo and/or V addition to enhance the mechanical properties of CoCrFeMnNi alloy","authors":"S. González , C.G. Garay-Reyes , A. Martínez-García , Konda Gokuldoss Prashanth , M.A. Ruiz-Esparza-Rodríguez , A. Hurtado-Macías , J. Eckert , R. Martínez-Sánchez","doi":"10.1016/j.jmrt.2025.03.074","DOIUrl":"10.1016/j.jmrt.2025.03.074","url":null,"abstract":"<div><div>This work shows that optimum combination of cooling rate control and refractory Mo and/or V element addition to the CoCrFeMnNi (Cantor) HEA enables to develop novel high-strength hierarchical microstructures consisting of FCC, σ phase and finely dispersed precipitates. This has been achieved by casting CoCrFeMnNiV<sub>0.5</sub>, CoCrFeMnNiMo<sub>0.5</sub> and CoCrFeMnNiV<sub>0.5</sub>Mo<sub>0.5</sub> at. % HEAs at a cooling rate of ∼1000 K/s. Since this cooling rate is relatively fast, it enables to retain the Mo and/or V alloying elements in solid solution in the FCC phase. The phenomenon of solid solution hardening contributes to a decrease in the maximum indentation depth from 100 μm for CoCrFeMnNi, to ∼89 μm and ∼85 μm for the FCC and σ phases, respectively in the CoCrFeMnNiV<sub>0.5</sub>Mo<sub>0.5</sub> at. % HEA. The novel microstructures additionally improve the wear resistance, particularly regarding the scratch hardness number, from H<sub>s</sub> = 2.74 GPa for CoCrFeMnNi, to 4.19 GPa for CoCrFeMnNiV<sub>0.5</sub>, 4.78 GPa for CoCrFeMnNiMo<sub>0.5</sub> and 6.85 GPa for CoCrFeMnNiMo<sub>0.5</sub>V<sub>0.5</sub> thus making these alloys of potential interest for engineering components subjected to load and wear.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 459-469"},"PeriodicalIF":6.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of non-equiatomic low-density alloys inspired by modified high-entropy shape memory alloy 受改良高熵形状记忆合金启发设计非等离子体低密度合金

IF 6.2 2区材料科学

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-03-11 DOI: 10.1016/j.jmrt.2025.02.059

Gonçalo Abrantes , Bernardo Alves , Daniel Gatões , Rodolfo Batalha , Patrícia Freitas Rodrigues

{"title":"Design of non-equiatomic low-density alloys inspired by modified high-entropy shape memory alloy","authors":"Gonçalo Abrantes , Bernardo Alves , Daniel Gatões , Rodolfo Batalha , Patrícia Freitas Rodrigues","doi":"10.1016/j.jmrt.2025.02.059","DOIUrl":"10.1016/j.jmrt.2025.02.059","url":null,"abstract":"<div><div>The increasing demand for lightweight, high-performance materials in advanced structural applications has driven significant research into low-density high entropy alloys and shape memory alloys. This study focuses on the development and characterization of a non-equiatomic, low-density, multi-phase (Ti6Al4V)<sub>50</sub>(Ni+Co)<sub>50</sub> alloy, inspired by modified high-entropy alloy design principles and optimized for advanced structural applications. The alloy exhibits a refined microstructure, a significantly reduced density of approximately 5.2 g/cm<span><math><msup><mrow></mrow><mrow><mn>3</mn></mrow></msup></math></span> – lower than conventional nickel-based shape memory alloys and other low-density high-entropy alloys – and superior mechanical properties, including high compressive yield strength. Strain recovery experiments and DSC analysis also confirm shape memory characteristics, supporting its potential use in functional applications. These properties, combined with its printability in laser powder bed fusion (L-PBF), make the (Ti6Al4V)50(Ni+Co)50 alloy a candidate for additive manufacturing, exhibiting low porosity and minimal cracking during processing.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 72-79"},"PeriodicalIF":6.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0