Article
Materials Science, Multidisciplinary
Pawel Figiel, Anna Biedunkiewicz, Katarzyna Jach, Aleksei Obrosov, Dariusz Garbiec, Maciej Bik, Maciej Sitarz, Zofia Kucia, Miroslawa Pawlyta, Sabine Weiss
Summary: The paper presents the characteristics of Ti-Mo-xTiC composites manufactured under experimentally selected conditions using the upgraded field-assisted sintering technique (U-FAST). The composites with the highest content of reinforcing phase are characterized by the highest values of hardness, Young's modulus and wear resistance.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Robert A. Green-Warren, Luc Bontoux, Noah M. McAllister, Dylan A. Kovacevich, Asaad Shaikh, Christianna Kuznetsova, Max Tenorio, Lin Lei, Assimina A. Pelegri, Jonathan P. Singer
Summary: Electrospray deposition (ESD) is a versatile technology for micro/nanocoating that utilizes competition between droplet surface charge and surface tension to create monodisperse droplets. Self-limiting ESD (SLED) is a mode where glassy polymers sprayed in volatile solvent below T-g result in charge accumulation on the coating surface, impacting film thickness growth.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Mechanics
Dinh-Quan Doan, Te-Hua Fang, Tao-Hsing Chen
Summary: This study investigates the influence of surface orientation and thickness on the mechanical properties of TiN/Al bilayer composites. The results show that samples with Ti-face have the highest hardness and loading force, and an increase in TiN thickness leads to higher hardness and loading force. However, defects like dislocations and phase transformations appear more in TiN/Al workpieces with Ti-face.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Mehdi Shahedi Asl, Zohre Ahmadi, Farhad Sadegh Moghanlou, Mohammad Vajdi, Mohammadreza Shokouhimehr
Summary: This investigation examines the microstructure and mechanical properties of TiB2-SiC-graphene ceramics. The results show that the system is unreactive, preventing the in-situ nucleation of B4C and TiC phases. While the presence of TiO2 and B2O3 impurities is reduced with the addition of graphene nano-platelets (GNPs), SiO2 is confirmed to be present in the final microstructure. The TiB2 phase exhibits significantly higher hardness and Young modulus compared to the SiC phase.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Robert A. Green-Warren, Luc Bontoux, Noah M. McAllister, Dylan A. Kovacevich, Asaad Shaikh, Christianna Kuznetsova, Max Tenorio, Lin Lei, Assimina A. Pelegri, Jonathan P. Singer
Summary: Electrospray deposition is a versatile coating technology that creates uniform micro-/nanodroplets through the competition between droplet surface charge and surface tension. Self-limiting ESD has been observed in certain conditions, leading to controlled film growth. By blending mechanical modifiers, the mechanical properties of the films can be tuned within the compositional ranges.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Polymer Science
Zhenxue Zhang, Denise Bellisario, Fabrizio Quadrini, Simon Jestin, Francesca Ravanelli, Mauro Castello, Xiaoying Li, Hanshan Dong
Summary: Different versatile nanoindentation investigation techniques were used to study three multifunctional smart composites for next-generation applications, aiming to determine their specific properties and interactions, and to examine the peculiarities of charge/matrix, charge/surface, or smart functions interactions.
Article
Materials Science, Multidisciplinary
Laura Silvestroni, Simone Failla, Nicola Gilli, Cesare Melandri, Umut Savac, Servet Turan, Diletta Sciti
Summary: This study investigates the microstructural features of B4C-TiB2 composites and their evolution from powder processing to sintering. Nanoindentation was used to correlate small-scale grain structures to local properties, providing insights into mechanical behavior. The development of a core/shell structure with different compositions and variable guest cations in the boride grains was observed in dense ceramics, revealing new findings for the synthesis of high-performance materials.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Ahmed Sameer Khan Mohammed, Richard Rateick, Huseyin Sehitoglu
Summary: The mechanical properties of Carbon-Carbon (C/C) composites are greatly influenced by the strength of the fiber-matrix interface. However, little attention has been given to the pre-fracture behavior that determines this interface strength. This study investigates the structural changes caused by inelastic energy dissipation prior to fracture in C/C composites using flat-punch Nanoindentation coupled with Transmission Electron Microscopy (TEM). The results demonstrate that the dissipated energy causes graphitization of the composite and leads to a weakening of the interface, which is indicated by a reduction in basal interplanar spacing and relative Orientation Angle between crystallites within the fiber and matrix regions. A hypothesis is proposed that suggests a higher initial OA-mismatch results in a higher interface strength due to more energy dissipation. This study establishes the importance of pre-fracture microstructural evolution mechanisms in dictating interface strength and presents a novel hypothesis for the design of C/C mechanical properties.
Article
Materials Science, Multidisciplinary
M. Ghanbariha, M. Farvizi, T. Ebadzadeh, A. Alizadeh Samiyan, H. S. Kim
Summary: AlCoCrFeNi-x wt% NiTi (x = 0, 5, and 10) high entropy alloy (HEA) composites were prepared using mechanical alloying and spark plasma sintering methods. The introduction of 5 wt% NiTi slightly changed the BCC and FCC fractions of the HEA matrix. However, in the HEA-10NiTi sample, there was a reduction in the (Ni,Al)-rich BCC phase fraction due to increased interfacial regions and accelerated interdiffusion between elements. Nano-indentation tests showed that the NiTi and BCC phases had higher hardness-to-elastic modulus values, indicating a positive effect on tribological behavior. HEA-5NiTi had the lowest wear rate among the prepared specimens, attributed to the higher BCC phase fraction and reinforcing effect of the NiTi particles.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Mechanics
L. Roy Xu, Alp Karakoc, Mark Flores, Haibin Ning, Ertugrul Taciroglu
Summary: This study develops an integrated numerical and experimental method for predicting interlaminar impact damage in composite laminates. By using nanoindentation technique to measure the stiffness properties of composites, the upper-bound of damage at different impact energy levels is predicted and validated through experimental tests.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Mechanical
M. Erkin Cura, Michal Trebala, Yanling Ge, Piotr Klimczyk, Simo-Pekka Hannula
Summary: Oxygen vacancies in WO2.9 create easy shear planes, which can reduce friction in boundary lubrication conditions. The study found that the composite n-ZrO2 + 10 vol% WO2.9 had the lowest coefficient of friction and wear rate, thanks to WO2.9 acting as a solid lubricant.
Article
Materials Science, Multidisciplinary
Helena Perez-Martin, Paul Mackenzie, Alex Baidak, Conchur M. O. Bradaigh, Dipa Ray
Summary: The present work focuses on characterizing the micromechanical properties of CF/PEKK composites with different crystallinity levels and morphologies. The study demonstrates that compression-moulded laminates have a superior polymer matrix compared to ATP laminates. Nanoindentation testing reveals a transition from the fiber to the matrix bulk in all samples. The study of micromechanical properties provides insights into the impact of manufacturing conditions on the composite's macro performance.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Clifton H. Bumgardner, Jason D. Baker, Andrew J. Ritchey, Xiaodong Li
Summary: The local creep response of SiC/SiC ceramic matrix composites was examined via high-temperature indentation to study the contributions of heterogeneous microstructure to creep. Different materials showed varying creep strain rates under indentation tests, with a developed analytical creep model based on a rule of mixtures approach to incorporate material heterogeneity of the SiC/SiC composite. The finite element model predicted the indentation deformation zone influenced by the composite constituents and showed good agreement with experimental measurements up to 800 degrees C.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Construction & Building Technology
Peter J. Collins, Robert J. Thomas, Aleksandra Radlinska
Summary: This paper investigates the influence of gravity on the micromechanical properties of portland cement pastes that contain the lunar regolith simulant JSC-1A. The results suggest that gravity does not influence the mechanical properties of the hydrated phases in-situ. Additionally, insights into the potential performance of lunar regolith as a component in composite materials are provided.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Materials Science, Characterization & Testing
Sijia Shen, Hongbo Li, Lingwei Yang, Na Li, Jinting Wu, Tingxing Zhao
Summary: A novel high-throughput methodology is proposed to measure the micro-mechanical properties of polymer matrix composites at different temperatures. The study reveals a linear softening of the polyimide matrix at high temperatures and an increase in strain rate sensitivity. The interfacial shear strength between the fiber and matrix is also temperature-dependent.
Article
Materials Science, Ceramics
A. Tarasov, V. V. Shvartsman, S. Shoja, D. Lewin, D. C. Lupascu, H. Wiggers
CERAMICS INTERNATIONAL
(2020)
Article
Architecture
Edoardo Rossi, M. Sebastiani, R. Gigliotti, M. D'Amato
Summary: Control and inspection of elastomeric bearings for seismic isolation is crucial for preserving structure performance. Traditional methods have limitations, but a new procedure using nanoindentation tests allows for quantitatively estimating characteristics with low costs and minimal impact on isolating devices. Experimental tests showed promising results compared to traditional shear tests.
INTERNATIONAL JOURNAL OF ARCHITECTURAL HERITAGE
(2021)
Article
Construction & Building Technology
Domenic Ganter, Steffen Franzka, Vladimir V. Shvartsman, Doru C. Lupascu
Summary: This study used scanning probe microscopy to investigate the surface effects and bulk properties of bitumen. The results showed that the 'bee' structures only exist on the surface and can be removed using a special technique. This suggests that improving asphalt recycling will require chemical treatment of aged bitumen instead of modifying the surface microstructure. However, the bitumen surface microstructure can still serve as a fingerprint of overall properties to some extent.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Physics, Multidisciplinary
Heinz Haas, Jens Roder, Joao G. Correia, J. Schell, Abel S. Fenta, Reiner Vianden, Emil M. H. Larsen, Patrick A. Aggelund, Rasmus Fromsejer, Lars B. S. Hemmingsen, Stephan P. A. Sauer, Doru C. Lupascu, Vitor S. Amaral
Summary: Accurate nuclear quadrupole moment values are crucial for nuclear structure models and interpreting nuclear interactions. A novel approach combining experimental measurements and electronic structure calculations was introduced, successfully applied to Hg and Cd halides, yielding precise results.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Applied
Xin Chen, Siqi Li, Xiaodong Jian, Yusra Hambal, Sheng-Guo Lu, Vladimir V. Shvartsman, Doru C. Lupascu, Q. M. Zhang
Summary: The electrocaloric effect (ECE) in dielectrics is characterized by isothermal entropy change and adiabatic temperature change induced by external electric fields. The Maxwell relation provides a convenient way to deduce the ECE from polarization data in ferroelectrics. The indirect method can result in significantly different ECE values compared to direct measurements in practical ferroelectric materials.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Ceramics
Nicole Bartek, Vladimir V. Shvartsman, Soma Salamon, Heiko Wende, Doru C. Lupascu
Summary: Lead iron niobate (PFN) is a multiferroic material with properties highly dependent on synthesis conditions. By optimizing calcination and sintering temperatures, ceramics with large polarization and dielectric permittivity can be obtained. Increasing temperatures also affects the ferroelectric phase transition and Ne ' el temperature due to a change in the distribution of Fe3+ and Nb5+ ions.
CERAMICS INTERNATIONAL
(2021)
Article
Polymer Science
Yusra Hambal, Vladimir V. Shvartsman, Daniil Lewin, Chieng Huo Huat, Xin Chen, Ivo Michiels, Qiming Zhang, Doru C. Lupascu
Summary: The temperature dependence of dielectric permittivity and polarization hysteresis loops of P(VDF-TrFE-CFE) polymer films with different compositions was studied, confirming relaxor behavior in all samples. Increasing CFE content lowered the freezing temperature and stabilized the ergodic relaxor state, with observed double hysteresis loops related to a field-induced transition to a ferroelectric state. Energy storage performance was evaluated, with one composition showing the largest energy density and charge-discharge efficiency comparable to the best literature data for the neat terpolymers.
Article
Chemistry, Physical
Amjad Farooq, Motiur Rahman Khan, Tobias Abzieher, Achim Voigt, Doru C. Lupascu, Uli Lemmer, Bryce Sydney Richards, Ulrich Wilhelm Paetzold
Summary: The decomposition of the perovskite absorber into lead iodide caused by high-energy photons plays a key role in the performance deterioration of PSCs undergoing light-induced degradation. Challenging wavelengths are found in the range of 300-500 nm, while longer wavelength light has the least harmful effect on a mixed-cation perovskite composition. Additionally, different bias conditions have pronounced effects on the light stability of PSCs.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Zied Othmen, Riadh Othmen, Kais Daoudi, Michel Boudard, Antonella Cavanna, Ali Madouri, Pascale Gemeiner, Doru C. Lupascu, Meherzi Oueslati, Brahim Dkhil
Summary: The successful synthesis and transfer of graphene monolayers onto epitaxial mixed valence La0.7Sr0.3CoO3 (LSCO) thin films revealed the activation of Jahn-Teller modes in the LSCO films. The presence of graphene was found to affect the magnetic properties of LSCO, leading to a phase transition at around 135 K as compared to the bare LSCO films which exhibit a ferromagnetic transition at around 200 K. Raman spectroscopy measurements confirmed the magnetic phase transition as a function of temperature, indicating a vibrational transition around the same temperature.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
M. Naveed-Ul-Haq, Vladimir V. Shvartsman, Vytautas Samulionis, Maksim Ivanov, Juras Banys, Doru C. Lupascu
Summary: This study investigates the temperature-dependent ultrasonic and dielectric properties of BCZT/NFO composite multiferroics and their relation to the magnetoelectric effect. The key factor in maximizing the magnetoelectric effect is the strong elastic softening of the BCZT phase at its ferroelectric phase transition. The temperature dependence of the magnetostrictive phase has little direct impact on the magnetoelectric effect.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Ceramics
Arun Ichangi, Vladimir V. Shvartsman, Doru C. Lupascu, Khan Le, Matthias Grosch, Anna Kathrin Schmidt-Verma, Christoph Bohr, Anjneya Verma, Thomas Fischer, Sanjay Mathur
Summary: This study demonstrates a flexible nanogenerator based on electrospun Li and Ta-modified lead-free KNN nanofibers, yielding a high voltage output of 5.6 V. The incorporation of Li and Ta into the KNN lattice significantly influences the electromechanical coupling and the morphology of the nanofibers.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Eva Kroll, Miriana Vadala, Juliana Schell, Simon Stegemann, Jochen Ballof, Sebastian Rothe, Doru C. Lupascu
Summary: The highly porous yttrium oxide fabricated through freeze casting with different solid loading amounts showed variations in pore size and structure, with higher solid loading resulting in increased porosity and crosslinking in the aligned channels. Results from thermal aging and FLUKA simulation demonstrated the mechanical integrity of the target materials even at high operation temperatures, suggesting potential applications beyond producing short-lived radioactive isotopes.
Article
Engineering, Marine
Felix Paul, Tommy Mielke, Carina Schwarz, Joerg Schroeder, Tokoloho Rampai, Sebastian Skatulla, Riesna R. Audh, Ehlke Hepworth, Marcello Vichi, Doru C. Lupascu
Summary: Frazil ice, the first ice forming in the annual cycle in the Marginal Ice Zone (MIZ) of the Antarctic, consists of loose disc-shaped ice crystals and plays a fundamental role in the freezing processes by forming the surface grease ice layer. The rheological properties of frazil ice, including shear thinning flow behavior, have a crucial influence on the growth of sea ice in the MIZ, and real-data-founded measurements enable modeling of the annual ice cycle.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Crystallography
Thien Thanh Dang, Juliana Schell, Reinhard Beck, Cornelia Noll, Doru C. Lupascu
Summary: This study investigates the magnetic field effects in semiconductors using the TDPAC technique. The results show that there are almost no intrinsic point defects in the semiconductors, and an electric interaction occurs at low temperatures.
Article
Chemistry, Multidisciplinary
Astita Dubey, Alexander Schmitz, Vladimir V. Shvartsman, Gerd Bacher, Doru C. Lupascu, Marianela Escobar Castillo
Summary: The study reported the enhanced photocatalytic efficiency of Ba-doped BiFe0.95Mn0.05O3 (BFM) nanoparticles compared to BiFeO3 (BFO) nanoparticles for organic pollutant degradation under visible light absorption. Co-doping Ba and Mn in BFO nanoparticles up to 5 mol% increased specific surface area and photocatalytic efficiency, with 1 mol% Ba doped BFM NPs showing the highest efficiency for factors like increased light absorption ability and charge carrier separation. Optimal dopant concentrations for photocatalytic applications were found to be 1 mol% Ba and 5 mol% Mn co-incorporation.
NANOSCALE ADVANCES
(2021)
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)
