Article
Engineering, Mechanical
J. Saelzer, S. Berger, I. Iovkov, A. Zabel, D. Biermann
Summary: Friction behavior significantly influences tool wear and surface integrity in the machining process, making accurate prediction of friction behavior crucial for simulation-based design. Previous research has shown that relative speed is a significant factor in friction behavior between metallic materials and cemented carbide, particularly in relation to tool surface topography. This study presents results from friction characterization under machining-similar conditions and aims to develop models that consider relative speed and surface topography for the friction coefficient.
Article
Materials Science, Multidisciplinary
Lingxiao Zhou, Qianduo Zhuang, Xinrui Min, Weijie Liu, Zhenming Yue, Jun Gao
Summary: In this study, the mechanical heterogeneity of carbon nanotube-reinforced aluminium was investigated by introducing a transition zone. A dislocation-based plastic strain constitutive model was used to analyze the mechanical response and the simulation results were in good agreement with the experimental data. The influence of the transition zone thickness on the macroscopic mechanical response and the distribution of geometrically necessary dislocations were discussed.
MATERIALS SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Jianjun Li, Tianyu Chen, Tingting Chen, Zhong Yun, Xiaodong Xia
Summary: A finite element model was established to investigate the deformation of bimodal structured copper during scratch test, showing that bimodal nanostructures can achieve a lower coefficient of friction by adjusting the grain size and volume fraction of the hard and soft domains.
The study found that the heterogeneity of bimodal nanostructures can effectively restrain strain localization, leading to reduced coefficient of friction and a better balance of high strength and low COF.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Pedro Vinicius Sousa Machado, Ferhun C. Caner, Luis Llanes, Emilio Jimenez Pique
Summary: In this study, the mechanical behavior of tungsten carbide-cobalt (WC-Co) composites under monotonic loads is extensively investigated using nanoindentation tests, tension tests on nanowires, and compression tests on micropillars. A novel computational framework is proposed, consisting of two different microplane constitutive models for the WC and Co phases. Finite element simulations based on experimental tomography re-constructions are employed to validate the models and provide further insights into the mechanical behavior of these composites.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Engineering, Mechanical
Saman Sayahlatifi, Zahra Zaiemyekeh, Chenwei Shao, Andre McDonald, James D. Hogan
Summary: 3D micro-scale finite element models were developed to analyze the failure mechanisms and behavior of CSAM Al-Al2O3 composites under different stress states. The models quantified the matrix ductile failure, particle cracking, and matrix/particle debonding mechanisms based on crack volume fraction, fraction of cracked particles, and fraction of debonded interfacial nodes. The models were validated and used to study the effects of particle content and size on material behavior. The results showed that the failure mechanisms are activated in a specific order and that particle size minimally affects the material strength and flow stress under shear. This work provides a better understanding of the stress-state-dependent evolution of failure mechanisms and has implications for the design of improved Al-Al2O3 composites.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Elena Bobruk, Vladimir V. Astanin, Ilnar A. Ramazanov, Nail G. Zaripov, Vil U. Kazykhanov, Nariman A. Enikeev
Summary: Homogeneous nanostructured and ultrafine-grained states were achieved in an Al-Mg-Mn-Zn-Zr alloy through high pressure torsion and continuous equal channel angular pressing. The refined grain structure in both states exhibited low temperature and high strain rate superplastic behavior. The nanostructured alloy was used for MMC fabrication under superplastic conditions, resulting in defect-free compaction of an Al-B fiber-reinforced composite.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Automation & Control Systems
Catarina Vidal, Pedro M. M. Ferreira, Patrick L. L. Inacio, Francisco B. B. Ferreira, Duarte Santiago, Pedro Meneses, Rui J. C. Silva, Telmo G. G. Santos
Summary: Upward friction stir processing (UFSP) is a new variant of friction stir processing that utilizes two sheets with functional particles to control and promote a more uniform distribution. By adjusting process parameters, the particles' distribution in the stir zone of metallic composites can be improved, especially when multi-passes are performed towards the retreating side. The UFSP technique can significantly affect material's properties, such as mechanical strength, and careful parameter selection is crucial to optimize performance.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jinwoo Lee, Hyuk Jong Bong, Jinjin Ha, Daeyong Kim
Summary: In this study, the ductile damage responses of high-strength 7000 series aluminum alloy (AA) 7075-T6 sheet samples under plane strain deformation were investigated using finite element simulations. The results showed that the GTN-shear model accurately predicted the ductile behavior of the material, and the virtual roll forming simulations demonstrated the significance of this prediction in industrial applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Analytical
Jiakang Zhou, Jieqiong Lin, Mingming Lu, Xian Jing, Yubo Jin, Dunlan Song
Summary: The study found that using models with irregular polygonal particles in the cutting simulation process for metal matrix composites is closer to the actual microstructure, better reflects particle deformation behavior, and captures more details of the impact caused by particles on cutting forces.
Article
Materials Science, Multidisciplinary
Rebecca Reiff-Musgrove, Marcus Gaiser-Porter, Wenchen Gu, Jimmy E. Campbell, Peter Lewis, Andreas Frehn, Andrew D. Tarrant, Yuanbo T. Tang, Max Burley, Trevor William Clyne
Summary: This article introduces the use of profilometry-based indentation plastometry (PIP) to obtain mechanical property information of particulate metal matrix composites (MMCs). By conducting PIP tests and conventional uniaxial tests on four different MMCs, it is demonstrated that reliable stress-strain curves can be obtained with PIP, although prenecking fracture is possible. The article also highlights the importance of considering scale effects and conducting repeat PIP tests to account for the scatter in PIP profiles and obtain macroscopic properties. Despite these challenges, PIP testing is shown to reliably detect the relatively minor macroscopic anisotropy exhibited by forged materials of this type.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Composites
Jagan Selvaraj, Luiz F. Kawashita, Mehdi Yasaee, Gordon Kalwak, Stephen R. Hallett
Summary: A novel cohesive element formulation is proposed for modelling composite delamination, offering increased stability and requiring fewer elements. This new formulation combines nodal rotations and multiple integration points to improve the accuracy of delamination propagation simulation.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
V. K. Parikh, V. J. Badheka, A. D. Badgujar, N. D. Ghetiya
Summary: This article demonstrates the fabrication process of aluminum alloy 2014 based metal matrix composites with silicon carbide particles as reinforcement. Friction stir processing was utilized to improve particle distribution and grain size, leading to enhanced microhardness of the processed composites. The study also investigated the impact of processing parameters on the metallurgical properties of the composites.
MATERIALS AND MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Multidisciplinary
Csilla Kadar, Pierre Kubelka, Attila Szlancsik
Summary: The influence of Al and Mg-based materials on the compressive behavior of syntactic foams was investigated. Different combinations of cp-Al and cp-Mg foams with ceramic hollow spheres (Al2O3 or Al2O3/SiO2/mullite) were manufactured. A finite element model was established to explain the experimental results and explore the effect of matrix and hollow sphere properties. The model accurately predicted the compression curve for highly ductile foams with Al matrix, while fracture in the early stage of compression significantly affected the stiffness of Mg matrix syntactic foams with Al2O3 hollow spheres.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Puzhen Shao, Kai Sun, Ping Zhu, Kai Liu, Qiang Zhang, Wenshu Yang, Zhijun Wang, Ming Sun, Dingyue Zhang, Sergey Kidalov, Haiying Xiao, Gaohui Wu
Summary: The present work investigates the properties of graphene-nanoplates/aluminum composites with a heterogeneous matrix design, and demonstrates that this design improves the mechanical properties, plasticity, and strengthening effect of the material.
Article
Materials Science, Ceramics
Mingming Chen, Qinghui Liu
Summary: A multi-scale modelling approach was developed in this paper to predict the progressive damage and failure behaviour of 2D woven SiC/SiC composites. By establishing models at the tow scale and meso-scale, the damage and failure processes of the composite were successfully simulated.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Yinyin Zhang, David Chern, Robert Schulz, Janine Mauzeroll, Richard R. Chromik
Summary: Self-lubricating duplex composites consisting of a top layer of polymer composites and a bottom layer of infiltrated metal networks were produced with varying graphite content, showing that the graphite content affects the performance of the graphite composites and providing insights into the design principles for manufacturing self-lubricating polymer matrix composites.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Coatings & Films
R. Ortiz-Fernandez, S. Imbriglio, R. Chromik, B. Jodoin
Summary: The study reveals that substrate preheating in induction heating cold spray significantly enhances adhesion strength, increases bonded area, and alters the characteristics of failure mode.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Alexandre R. C. Nascimento, Richard R. Chromik, Robert Schulz
Summary: This study investigated the friction and wear behavior of three materials commonly used in industrial bearing applications: a Sn-based Babbitt, polytetrafluoroethylene (PTFE), and a polyether ether ketone (PEEK) composite. The effects of load and sliding velocities on wear rates were evaluated by regression analysis, with a focus on the relationship between wear and materials mechanical properties. The ranking of wear performance correlated most strongly with the ratio of hardness to reduced modulus, with implications for estimating oil film thickness in lubrication regimes.
Article
Engineering, Mechanical
Sima A. Alidokht, Richard R. Chromik
Summary: Metal matrix composites reinforced with WC particles and Co or Ni matrices are known for their unique combination of hardness, toughness, and superior wear performance. This study focused on Ni-WCNi composite coatings and found that coatings with higher WC fill ratios displayed better wear resistance due to the uniform distribution of WC particles and shorter mean free path reducing adhesive wear. However, at higher loads, subsurface crack propagation at WC particle interfaces led to a reduction in the protective role of mechanically mixed layers. Scratch tests were used to qualitatively compare coating cohesion strengths and correlate them to wear properties.
Article
Engineering, Mechanical
M. Koricherla, T. B. Torgerson, S. A. Alidokht, V. N. V. Munagala, R. R. Chromik, T. W. Scharf
Summary: Ti and Ti-based alloys are commonly used in aerospace and automotive components, but face challenges in wear resistance at elevated temperatures. The study found that Ti-xTiC composite coatings exhibit improved friction and wear performance compared to baseline Ti coatings, with Ti-35%TiC showing the best overall performance at 575 degrees C. The tribological behavior was attributed to the formation of stable oxide layers on the wear surfaces containing TiO2, WO3, and CoWO4.
Article
Materials Science, Coatings & Films
Venkata Naga Vamsi Munagala, Richard R. Chromik
Summary: Ti6Al4V-TiC metal matrix composite (MMC) coatings were cold sprayed using spherical and irregular Ti6Al4V powders with plasma gas atomization and the Armstrong process, respectively. Composite coatings deposited using irregular powders exhibit higher ceramic retentions and lower porosity compared to those made with spherical powder. In wear tests, irregular powder composites showed resistance to abrasive wear mechanisms with lower coefficients of friction and wear rates due to the presence of islands of tribolayers, while increasing ceramic content led to even lower wear rates and continuous tribolayer formation at higher loads. The formation of tribolayers resulted in coarser-grain microstructures in the worn subsurface, indicating less stress transfer and lower wear rates.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Priyadarshi Behera, Richard R. Chromik, Stephen Yue
Summary: The study showed that changes in relative humidity and coating type have a 10-fold difference in wear rate of the steel substrate. The Cd coating decreases substrate wear, while the Al coating increases it. Residual third bodies, which were oxides and hydroxides of the coating, affect the wear process of the steel substrate after coating wear-through.
Article
Engineering, Mechanical
Soha Baydoun, Siegfried Fouvry, Sylvie Descartes
Summary: The study found that the wear rate decreases asymptotically with contact size, due to easier oxygen access to the interface favoring abrasive wear (COC) and faster ejection of protective debris particles (TBT). Wear rate evolutions and analyses suggest that COC is mainly driven by minimum distance between contact center and air contact edges, while TBT is mainly controlled by ratio of collinear contact length to sliding amplitude.
Article
Materials Science, Multidisciplinary
Olivier Bouillanne, Guilhem Mollon, Aurelien Saulot, Sylvie Descartes, Nathalie Serres, Guillaume Chassaing, Karim Demmou
Summary: This paper investigates the complex kinematics of deformable granular flows using a multibody meshfree model. The study focuses on the effects of cohesion, stiffness, and viscosity of the particles on their collective sheared flows in tribological contacts. The results provide insight into the relationships between these parameters and the emerging friction coefficient of the sheared interface.
Article
Materials Science, Coatings & Films
Payank Patel, Sima A. Alidokht, Navid Sharifi, Amit Roy, Kelly Harrington, Pantcho Stoyanov, Richard R. Chromik, Christian Moreau
Summary: High entropy alloys (HEAs), characterized by containing five or more principal elements, are considered as potential candidates for high-temperature applications due to their superior mechanical and thermal properties. In this study, the microstructure and wear behavior of CrMnFeCoNi HEA coatings were evaluated, revealing equivalent behavior of as sprayed and annealed coatings on polished surfaces and higher wear rates on rough surfaces.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Steven A. Policastro, J. Michael Shockley, Matthew J. Strom, Christopher R. So, Derek J. Horton, Kathryn J. Wahl
Summary: The wear-assisted corrosion response of a super-duplex stainless-steel from a single asperity contact was studied using atomic force microscopy (AFM). The results showed that the stress fields induced damage in the protective oxide and disrupted other oxide-formation processes, leading to slower repassivation.
Review
Chemistry, Physical
Payank Patel, Amit Roy, Navid Sharifi, Pantcho Stoyanov, Richard R. Chromik, Christian Moreau
Summary: This review article discusses the synthesis methods, microstructural characteristics, and tribological performance of high-entropy coatings (HECs). HECs exhibit favorable mechanical and tribological properties at high temperatures.
Article
Materials Science, Multidisciplinary
Nhat Minh Dang, Wen-Yen Lin, Zhao-Ying Wang, Sima Ahmad Alidokht, Richard R. Chromik, Terry Yuan-Fang Chen, Ming-Tzer Lin
Summary: This study investigated the mechanical properties and residual stress of high-power impulse magnetron sputtering (HiPIMS) titanium nitride (TiN) thin film capping on a cold spray titanium (Ti) coating. The results showed that the TiN/Ti duplex coating exhibited excellent mechanical properties, and the residual stresses did not significantly change with different Ti cold spray substrates, indicating the feasibility of coating technology in the aerospace industry.
Article
Engineering, Electrical & Electronic
Alizee Bouchot, Amandine Ferrieux-Paquet, Guilhem Mollon, Sylvie Descartes, Johan Debayle
Summary: In this study, a method is proposed to characterize third body particles generated by dry friction using image acquisition and analysis. The particles are observed by scanning electron microscopy and segmented using machine learning at the pixel level. The most relevant geometrical and textural descriptors are then selected and correlated to tribological characteristics. The method provides quantitative results to better understand the mechanisms of wear phenomenon and the morphology of ejected third body particles.
JOURNAL OF ELECTRONIC IMAGING
(2022)
Article
Materials Science, Multidisciplinary
S. A. Alidokht, Y. Gao, B. C. N. M. de Castilho, N. Sharifi, M. Harfouche, P. Stoyanov, M. Makowiec, C. Moreau, R. R. Chromik
Summary: In this study, two Co-based Tribaloy powders were coated on mild steel substrate using high-velocity oxygen fuel (HVOF) spraying. The microstructure and distribution of Laves phases in the coatings were investigated. It was found that Co3Mo2Si and Co3Mo were the main constituents of the intermetallic Laves phases in the sprayed coatings. The volume fraction of Laves phases in the coatings was significantly lower compared to similar alloys due to high cooling rate and solidification in HVOF. The Laves-free solid solution exhibited a nano-crystalline microstructure with similar local hardness to the Laves phases.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
