Article
Materials Science, Composites
Meghashree Padhan, Umesh Marathe, Jayashree Bijwe
Summary: The study developed a composite material with PBO fibers and PEEK using braiding/commingling technique, which showed superior performance in various properties compared to PEEK alone. The composite material has potential applications in structural and tribological fields.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Chuan Geng, Bo Huang, Nizhen Zhang, Jun Yi, Qing Wang, Yandong Jia, Fucheng Li, Junhua Luan, Xueling Hou, Wanxia Huang, Qingxi Yuan, Gang Wang, Weihua Wang
Summary: This study investigates the structural formation and evolution of shear bands inside metallic glasses using synchrotron X-ray nano-computed tomography and high-resolution transmission electron microscopy. The researchers found that the thickness of shear bands increases and their local densities decrease during plastic deformation. Prior to crack formation, low-density regions in shear bands evolve into nanovoids, and densified regions with crystal-like order appear around severe bond breaking. These findings are significant for understanding the evolution of shear bands and the plastic deformation mechanism of glassy materials.
Article
Nanoscience & Nanotechnology
B. Huang, X. C. Tang, C. Geng, Q. F. He, J. Yi, Q. Wang, W. X. Huang, Q. X. Yuan, Y. Yang, G. Wang, W. H. Wang
Summary: Using synchrotron X-ray nano-computed tomography and finite element analysis, we reconstructed the nanostructure of shear bands (SBs) and investigated their formation and evolution in a bent heterogeneous Pd-based metallic glass fiber. We found that in addition to plain SBs (PSBs), there were hidden SBs (HSBs) with density fluctuations inside the metallic glass. The HSBs had average densities 5%-25% smaller than the surrounding matrix and thicknesses ranging from 100 nm to 530 nm. The structures of the HSBs were closely related to the heterogeneous structure and local strain rate of the metallic glass.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Ceramics
A. Zocca, B. R. Mueller, R. Laquai, A. Kupsch, F. Wieder, S. Benemann, J. Wilbig, J. Guenster, G. Bruno
Summary: The microstructure of an apatite-wollastonite glass-ceramic was analyzed using 2D microscopy, phase analysis, X-ray absorption, and synchrotron X-ray refraction computed tomography (XCT and SXRCT). The combination of these techniques allowed for comprehensive characterization of the microstructure at different scales. The material exhibited a complex microstructure with a glassy matrix and embedded fluorapatite and wollastonite crystals, forming spiked structures resembling sea urchins. SXRCT revealed the 3D distribution of these structures with excellent contrast, and SEM-EDX analysis identified them as composed of sub-micrometric fluorapatite and diopside crystals.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Radoslaw Mirski, Joanna Walkiewicz, Dorota Dukarska, Adam Derkowski
Summary: This study investigated the effects of using waste wood particles of different sizes as fillers for open-cell polyurethane foams. It was found that the addition of wood particles influenced the density, foaming kinetics, cell structure, and morphology of the foams. The size of the wood particles also affected the number and size of cells in the foam composites.
Article
Construction & Building Technology
Ru Mu, Chengran Diao, Haoqi Liu, Hangpeng Wu, Longbang Qing, Shaowei Zhao, Lin Li
Summary: The study designed, prepared, and tested a full-field aligned steel fiber reinforced cementitious composites (FASFRC) prism specimen, with the orientation of steel fibers controlled by an external magnetic field. Testing showed that the mechanical properties of FASFRC specimens were significantly higher than other specimens due to the enhancement provided by the steel fiber reinforcement.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Manufacturing
J. Pernas-Sanchez, S. M. Garcia-Rodriguez, J. A. Artero-Guerrero, J. Lopez-Puente, J. Costa
Summary: This study investigates the behavior of carbon-epoxy laminates under high velocity impacts at room and cryogenic temperatures. The damage pattern of impacted specimens at low temperature exhibits a higher density of fiber breaks and shear matrix cracks, but does not result in a larger projected damaged area. Experimental analysis and calculations exclude the association of this particular pattern to temperature-induced damage mechanisms.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Nanoscience & Nanotechnology
Chuan Geng, Bo Huang, Kang Sun, Xindi Ma, Kai Hu, Yandong Jia, Xueling Hou, Wanxia Huang, Qingxi Yuan, Gang Wang
Summary: This study investigates the microstructure of metallic glass fibers with different Poisson's ratios or structural heterogeneities using synchrotron X-ray nano-computed tomography and high-resolution transmission electron microscopy. It is found that interlaminated high- and low-density layers induced by shear banding appear in the fracture-affected zone of the fibers. The fraction of crystal-like order regions in the fracture-affected zone is larger than that of the unaffected matrix.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Composites
Yujia He, Ming Mei, Kai Wei, Xujing Yang, Shuyong Duan, Xu Han
Summary: The study found that changes in stitching pattern and space influence the interlaminar shear performance and damage suppression mechanism of stitched composites. Reduction in stitching space enhances shear performance, while appropriate stitching patterns can increase the final load and suppress damage propagation.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Yongfeng Qian, Di Zhang, Jing Hong, Lin Zhang, Minqiang Jiang, Hu Huang, Jiwang Yan
Summary: Metallic glasses (MGs) are advanced structural materials with superior mechanical properties. This study investigates the use of SiC particles as reinforcement to improve the mechanical properties of Zr-based MG through laser surface alloying. The experimental results show that the laser-alloyed surface layers exhibit significantly improved hardness compared with the as-cast specimen, with an average hardness of 28.91 GPa at a relatively high overlap ratio of 70%.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Matthias Rutzen, Dirk Volkmer
Summary: This manuscript presents research on the fatigue behavior of a cementitious composite reinforced with chopped carbon fibers. The study uses dynamic mechanical analysis to determine fatigue life and gain insights on the material's viscoelastic properties. X-ray computed tomography is employed to visualize microcracks during fatigue testing. The findings show that the reinforced composites have a significantly longer lifespan due to the pseudoductility and microcracking induced by the fibers. In addition, an increase in inelastic events in the material's viscoelastic behavior is identified as an early indicator of fatigue failure.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Composites
Peter J. Creveling, John Fisher, Chris Dahlkamp, Michael W. Czabaj
Summary: This study presents a new approach to convert X-ray microcomputed tomography image data into high-fidelity finite element meshes using existing image segmentation and meshing tools. The results demonstrate that the mesh-generation approach allows for modeling distinct interactions between constituents, but the high number of elements required for discretization necessitates further work to improve mesh efficiency.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Sergio Scudino, Junhee Han, Rub Nawaz Shahid, Dina Bieberstein, Thomas Gemming, Jon Wright
Summary: Shear bands are nanoscale planar shear defects that mediate plasticity in metallic glasses. The understanding of shear banding requires three-dimensional characterization, which was not possible until now due to the inability of X-ray absorption tomography to distinguish shear bands from the surrounding matrix. However, this study overcomes this limitation by using the strain field generated by shear bands as a local probe for X-ray diffraction tomography.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Polymer Science
Vadim Levin, Yulia Petronyuk, Igor Artyukov, Inna Bukreeva, Alexander Malykhin, Elena Longo, Lorenzo D'Amico, Konstantinos Giannoukos, Giuliana Tromba
Summary: This study visualized the destructive processes of layered carbon fiber reinforced plastics under uniaxial stretching using synchrotron X-ray microtomography. The article focuses on the details of the early stages of deformation and highlights the sequence of irreversible structural changes before material destruction.
Article
Chemistry, Multidisciplinary
Mihai Stoica, Baran Sarac, Florian Spieckermann, Jonathan Wright, Christoph Gammer, Junhee Han, Petre F. Gostin, Juergen Eckert, Joerg F. Loeffler
Summary: The study demonstrates that X-ray diffraction computed nanotomography can provide accurate details of the internal structure of metallic glasses, which is of great significance for the research of metallic materials at the nanoscale.
Article
Engineering, Mechanical
S. W. Zhang, Z. D. Feng, S. Zhang, B. B. Zhang, W. Liu, N. B. Zhang, S. Chen, S. N. Luo
Summary: Deformation and phase transformation of a cold-rolled, textured, shape memory alloy sheet Ni50.6Ti49.4 were studied using real-time, in situ synchrotron X-ray diffraction and digital imaging correlation. The results showed that martensite nucleation was closely related to preexisting defects. In the cold-rolled alloy, uniform martensite phase transformation occurred due to the relatively wide distribution of preexisting defects, resulting in progressive growth of martensite, relatively uniform strain fields, sigmoidal stress-strain curves, and increased strain hardening rate. Additionally, the initial texture induced different favorably oriented martensite variants, and the phase transformation was more active for loading along the less favorable orientation, leading to anisotropy in the phase transformation.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
S. P. Zhao, Z. D. Feng, L. X. Li, X. J. Zhao, L. Lu, S. Chen, N. B. Zhang, Y. Cai, S. N. Luo
Summary: In this study, the deformation and damage behavior of a high-entropy alloy AlCoCrFeNi2.1 under shock compression and spallation were investigated through experiments and microscopic observations. The results showed that the crystal structure of the high-entropy alloy remained ordered during shock compression, while both ductile and brittle damage modes were observed during spallation. The high spall strength of this alloy was attributed to the high stability of its phase boundaries.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
J. C. Cheng, H. L. Qin, C. Li, F. Zhao, R. C. Pan, Q. Y. Wang, Y. L. Bian, S. N. Luo
Summary: High-entropy alloys (HEAs) have potential as structural materials for aerospace and defense applications. This study investigates the dynamic mechanical properties and microscopic deformation/damage mechanisms of the quaternary CoCrFeNi HEA. Shock compression and spallation experiments were performed and the mechanical properties and damage processes were evaluated. The results show that the CoCrFeNi HEA has high spall strength and exhibits ductile damage.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Guanyu Huang, Xiaoqing Zhang, Zhuocheng Xie, Wu-Rong Jian, Run Zhang, Xiaohu Yao
Summary: In this study, the creep behavior of CoCrNi medium-entropy alloys (MEAs) with and without chemical short-range order (CSRO) was investigated using large-scale molecular dynamics (MD) simulations. It was found that CSRO played an important role in the creep performance of the MEAs, leading to an increase in the activation energy for creep and a decrease in the creep rate.
MECHANICS OF MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yaohua Jiang, Jia Guo, Yang Mi, Weizheng Liang, Sheng-Nian Luo, Yanda Ji, Jijie Huang
Summary: Metal oxide vertically aligned nanocomposite thin films with plasmonic Au nanopillars in a ferromagnetic La0.67Sr0.33MnO3 (LSMO) matrix were studied using femtosecond pump-probe spectroscopy. The presence of Au nanopillars enhanced the charge generation and decreased the spin-lattice relaxation time in LSMO, as compared to pure LSMO. The nonequilibrium dynamics and energy transfer in the Au/LSMO films were well modeled using an extended three-temperature model. These thin films have potential applications in ultrafast photoelectric and magnetooptical devices.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yang Mi, Anqiang Jiang, Lei Kong, Jun Wang, Heng Guo, Sheng-Nian Luo
Summary: I-III-VI ternary quantum dots (QDs) have been proposed as non-toxic alternatives to II-VI QDs in optoelectronics and biotechnology. However, their application as optical gain media for microlasers is constrained by low neous emission (ASE) and lasing. In this study, passivated AIS QDs showed enhanced fluorescence efficiency and two-photon absorption cross section. ASE was achieved from AIS/ZnS core/shell QD films under both one- and two-photon pumping, with comparable thresholds to Cd-based QDs. A whispering-gallery-mode microlaser of the core/shell QDs was also demonstrated.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Mechanical
B. X. Bie, R. C. Pan, J. Xu, H. W. Chai, S. Chen, G. H. Du, Y. L. Bian, Y. Cai, S. N. Luo
Summary: Plate impact experiments were conducted to investigate the shock compression and spallation properties of PEEK. The study obtained the Hugoniot equation of state and the shock-state Lagrangian sound velocity of PEEK through reverse impact. It was found that the spallation of PEEK exhibited a two-stage behavior and the fracture toughness decreased with increasing impact velocity, likely due to the rearrangement and breakage of molecular chains.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
J. Y. Hua, Q. Liu, Hua Yang, Y. F. Xu, S. Chen, Z. Y. Zhong, N. B. Zhang, Y. Y. Wang, L. Xiao, L. Lu, Y. Cai, S. N. Luo
Summary: Ballistic impact experiments were conducted on a cast Mg-6Gd-3Y-0.5Zr alloy using spherical projectiles at various impact velocities. The deformation mechanisms of Mg-6Gd-3Y-0.5Zr near the crater were found to be dominated by shear bands and twinning, resulting in changes in texture due to compression caused by cavity expansion. A finite element model based on a Johnson-Cook constitutive model and Mie-Gruneisen equation of state was established, and an analytical model based on a dynamic cylindrical cavity expansion model was applied, showing consistent results with experimental and simulated data.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Physical
K. Yang, X. Yang, Z. L. Zhang, T. T. Zhu, J. Li, X. S. Xiao, Y. X. Liang, B. Jian, C. Li, S. N. Luo
Summary: The spall damage of Ti-6Al-4V alloy fabricated via laser powder bed fusion (LPBF) was investigated through plate impact in the build direction (BD) and the transverse direction (TD), focusing on its mechanisms and microstructure effects. Comparative analysis was performed on conventionally hot-rolled Ti-6Al-4V alloys processed with annealing and quenching. Results showed that the spall strength and Hugoniot elastic limit (HEL) of LPBF-fabricated samples were higher in the TD loading than in the BD loading. The LPBF-fabricated alloy exhibited a lower HEL but similar spall strength compared to conventionally fabricated alloys. The anisotropy in mechanical properties and damage was attributed to columnar prior beta grains, morphological, and crystallographic texture of martensite laths.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
L. X. Li, X. Y. Liu, J. Xu, S. C. Hu, Y. Cai, L. Lu, J. C. Cheng, Y. Tang, C. Li, N. B. Zhang, S. N. Luo
Summary: Plate impact experiments were conducted on a dendritic dual face-center cubic phase high-entropy alloy CoCrFeNiCu, revealing different deformation behaviors and damage modes in Cu-lean and Cu-rich regions under shock compression. The dependence of spall strength on peak shock stress was found to be abnormal due to strain localization and thermal softening in the Cu-rich regions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Y. W. Shi, Y. Y. Zhang, S. Chen, S. N. Luo
Summary: We investigate the impact of geometry and concentration on small angle X-ray scattering (SAXS) of nanoporous membranes using ultralarge atom-based simulations. By accurately extracting scattering curves from 2D SAXS patterns and interpreting them without any prior constraints on size distribution, we demonstrate the feasibility and limitations of retrieving structure parameters of complex nanoporous membranes from SAXS patterns. Our findings provide guidance for SAXS experiments and data interpretation.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Zhenpeng Zhang, Hailin Yin, Yanlei Shang, Sheng-Nian Luo
Summary: The rate constants of the C-C barrierless bond-fission reaction of ethanol have been accurately calculated using VRC-VTST and SS-QRRK. The CASPT2(2e,2o)/ccpVTZ multi-reference method is utilized to obtain the minimum energy profile and evaluate the feasibility of different density functional theory methods. The M06-2X/cc-pVTZ method is selected for rate constant calculations due to its superior performance.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Engineering, Mechanical
Q. Liu, J. Y. Hua, Y. F. Xu, K. Yang, J. C. Cheng, N. B. Zhang, C. Li, Y. Cai, S. N. Luo
Summary: Ballistic impact experiments were conducted on a CrMnFeCoNi high-entropy alloy using steel projectiles, and the penetration behavior at various impact velocities (approximately 800-2300 m/s) was investigated. The depth and diameter of the impact crater increased linearly with the impact velocity. Penetration resulted in increased hardness, and the peak hardness was independent of impact velocity. Multiple deformation defects including dislocations, twins, and kink bands were responsible for the penetration-induced hardening. A finite element method model based on measured mechanical properties successfully reproduced the experimental observations.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
A. R. Cui, S. C. Hu, S. Zhang, J. C. Cheng, Q. Li, J. Y. Huang, S. N. Luo
Summary: The spall damage of a coarse-grained CrCoNi MEA with a face-centered-cubic structure is investigated using plate impact experiments and molecular dynamics simulations. The highest spall strength (around 4 GPa) among the MEAs/HEAs ever reported is observed, along with similar or better impact ductility. The dominant damage mode undergoes a transition from intergranular to intragranular damage with increasing impact velocity, consistent with the findings from MD simulations.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Physical
J. Xu, S. H. Guo, X. Y. Liu, S. C. Hu, N. B. Zhang, L. Lu, B. Li, S. N. Luo
Summary: The spallation behavior of a solution-treated hot-rolled Inconel 718 superalloy was investigated through plate impact loading and ultrafast free-surface velocity measurements. The microstructures of the initial and postmortem samples were characterized using scanning electron microscopy and electron backscatter diffraction. It was found that incipient spallation occurred near a peak shock stress of 5.3 GPa and a tensile strain rate of 105 s-1. Ductile fracture was the main damage mode, with void nucleation predominantly occurring at grain boundaries and triple junctions. Molecular dynamics simulations were also conducted to explain the observed intergranular and intragranular damage mechanisms in the experiments. (c) 2023 Elsevier B.V. All rights reserved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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)
