Article
Materials Science, Ceramics
Marcin Godzierz, Piotr Olesik, Lukasz Otulakowski, Tomasz Pawlik, Karolina Olszowska, Pawel Chaber, Olha Masiuchok, Hanna Myalska-Glowacka, Jakub Smolen, Bartlomiej Toron, Piotr Szperlich, Urszula Szeluga, Slawomira Pusz
Summary: In this study, a novel, facile, and highly efficient reverse co-precipitation method was used to synthesize nanocrystalline bismuth ferrite (BFO) powder. The proposed method is cost-efficient and environmentally friendly. X-ray diffraction and scanning electron microscopy were used to analyze the crystal structure, phase composition, and morphology of the synthesized powders. The obtained materials showed excellent piezoelectric properties, comparable to those of praseodymium, samarium, or europium doped BiFeO3 ceramic.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Antonio Cervellino, Ruggero Frison
Summary: This article explores the diffraction characteristics of self-organised superlattices of nanocrystals, as well as their characteristic types of disorder, which are crucial for understanding the type and quality of the superlattice ordering.
Article
Nanoscience & Nanotechnology
S. R. Agnew, N. E. Peterson, J. J. Bhattacharyya, H. Macdonald, M. A. Wischhusen, Z. Harris, J. T. Burns, M. Webster
Summary: Prior studies have shown that the rate of sensitization in 5xxx-series Al-Mg alloys is influenced by the dislocation content, with lower dislocation densities resulting in higher rates of sensitization. This study used X-ray line profile analysis (LPA) to evaluate the dislocation density in 5083 and 5456 alloys samples with different tempers and thermomechanical processing states. The results demonstrated that LPA can distinguish between samples with different tempers, but not within a given temper. The technique, combined with a constitutive model, accurately predicted the mechanical strength of the alloys. However, the use of a more monochromatic X-ray source may enhance the technique's application for structural health monitoring of sensitization-prone 5xxx alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
K. Sikdar, B. Roy, A. Mahata, D. Roy
Summary: The structural stability of nano-grained Cu-Al alloy synthesized by ball milling under liquid nitrogen temperature was analyzed, showing only a 6% drop in hardness after annealing, indicating enhanced thermal stabilization of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Endale Abebe Gudeta
Summary: This study introduces a modified version of the Enzo-Parrish method to determine a straight background level with a nonzero gradient. The proposed method uses a scattering vector to determine the background and is validated on the XRD peak of a polymer sample.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Multidisciplinary Sciences
Akinobu Niozu, Yoshiaki Kumagai, Toshiyuki Nishiyama Hiraki, Hironobu Fukuzawa, Koji Motomura, Maximilian Bucher, Kazuki Asa, Yuhiro Sato, Yuta Ito, Daehyun You, Taishi Ono, Yiwen Li, Edwin Kukk, Catalin Miron, Liviu Neagu, Carlo Callegari, Michele Di Fraia, Giorgio Rossi, Davide Emilio Galli, Tommaso Pincelli, Alessandro Colombo, Shigeki Owada, Kensuke Tono, Takashi Kameshima, Yasumasa Joti, Tetsuo Katayama, Tadashi Togashi, Makina Yabashi, Kazuhiro Matsuda, Christoph Bostedt, Kiyoshi Ueda, Kiyonobu Nagaya
Summary: This study explores the formation process of solid Xe nanoparticles in an expanding supercooled Xe jet under vacuum conditions using X-ray diffraction experiments. It is found that the structure of Xe nanoparticles is a mixture of face-centered cubic and randomly stacked hexagonal close-packed structures, rather than pure face-centered cubic. Instantaneous coexistence of comparably sized face-centered cubic and hexagonal close-packed domains in single Xe nanoparticles is observed.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Materials Science, Multidisciplinary
Giora Kimmel, Alla Sahartov, Yatir Sadia, Ze'ev Porat, Jacob Zabicky, Efraim Dvir
Summary: The present study reports on the consistent non-monotonic lattice variation in nanocrystalline CeO2. Analysis of more than 30 powder samples revealed that unit cell parameters change smoothly with decreasing grain size, showing moderate contraction between 100 to 30 nm and severe expansion below 20 nm. The change in lattice parameter is modeled as a combination of surface tension-induced contraction and ionic bonds weakening-induced lattice expansion, applicable to most ionic nanocrystalline materials.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Ana C. Murrieta, Danyel Cavazos-Cavazos, Pamela Santos-Aguilar, Jorge L. Cholula-Diaz, Flavio F. Contreras-Torres
Summary: X-ray line profile analysis was used to study the microstructures of gold nanoparticles and gold thin-films, revealing larger crystallite size and lower dislocation density in AuTFs compared to AuNPs. The differences in strain, average distances among dislocations, and broadening effects were observed between AuNPs and AuTFs, suggesting different mechanisms contributing to the line broadening in the two types of samples.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Physics, Condensed Matter
Anita D. Souza, Sudhindra Rayaprol, M. S. Murari, Mamatha Daivajna
Summary: Polycrystalline bulk samples of La0.7-x BixSr0.3MnO3 manganites were processed into nanoparticles through high energy planetary ball milling, affecting magnetic transitions and magnetization with the influence of particle size and Bi3+.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Chemistry, Physical
Yan Mei, Wenjuan Chen, Xuean Chen
Summary: A lanthanum cerium fluoride abrasive was prepared using Ce-2(CO3)(3), La center dot Ce(CO3)(3), and NH4F raw materials at temperatures of 400-1050 degrees C. Various characterization techniques revealed that the materials consist of agglomerated irregular block-shaped particles with particle sizes in the micrometer range. The product was a mixture of cubic CeO2 and trigonal LaF3 below 850 degrees C, while above 900 degrees C, it became a mixture of cubic CeO2 and tetragonal LaOF. The material prepared at 900 degrees C showed potential as an abrasive for polishing optical glass surfaces, as it produced a clean and flat polishing surface with a moderate thickness difference before and after grinding.
Article
Chemistry, Multidisciplinary
Tsutomu Kanno, Hiromasa Tamaki, Masato Yoshiya, Hiroshi Uchiyama, Sachiko Maki, Masaki Takata, Yuzuru Miyazaki
Summary: A study on Mg3Sb2 revealed it to be heavily disordered with Frenkel defects and charge-neutral defect complexes. This compound exhibits exotic n-type dopability and a deviation from the standard temperature dependency in terms of thermal conductivity.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yuta Ito, Isao Tsuyumoto
Summary: Nanocrystalline lithium niobate, LiNbO3, is prepared through an aqueous solution process, starting from peroxo - polyniobic acid solution. The crystalline LiNbO3 has the same structure as conventional LiNbO3 with a small crystallite size. The nanocrystalline LiNbO3 prepared at 500 degrees Celsius exhibits a high ionic conductivity.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Hang Li, Weibo Hua, Bjoern Schwarz, Martin Etter, Stefan Mangold, Georgian Melinte, Nicola Pietro Maria Casati, Helmut Ehrenberg, Sylvio Indris
Summary: In this study, the structural and electronic changes of LiNiO2 at different temperatures were investigated through thermal treatments. Besides the decomposition process, a series of transformations were discovered under mild conditions, including the reaction with CO2 and the cation off-stoichiometry.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Daqiang Jiang, Jiale An, Yinong Liu, Zhiyuan Ma, Fangfeng Liu, Hong Yang, Xiaobing Ren, Kaiyuan Yu, Junsong Zhang, Xiaohua Jiang, Yang Ren, Lishan Cui
Summary: This paper reports on the strain glass transition observed in a nanocrystalline Ti50Ni35Pt15 alloy, achieved through a combination of doping of Pt atoms in the matrix and high-density grain boundaries. The alloy exhibited significant superelasticity and a low Young's modulus over a wide temperature range. The findings provide insight for the development of nanocrystalline strain glass shape-memory alloys.
Article
Physics, Applied
Anita D. Souza, Sudhindra Rayaprol, M. S. Murari, Mamatha D. Daivajna
Summary: The magnetic phase coexistence in the substituted perovskite compound La0.4Bi0.3Sr0.3MnO3 is attributed to spontaneous moment and metamagnetic transition. The reduction in particle size influences the physical properties by altering the magnetic interactions and possibly forming a magnetic dead layer.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2021)
Article
Engineering, Environmental
Giuseppe Mancuso, Michela Langone, Rosa Di Maggio, Attilio Toscano, Gianni Andreottola
Summary: Sewage sludge is a by-product of wastewater treatment processes which, if not properly treated, can pose a threat to crop production and human health. Hydrodynamic cavitation is an eco-friendly and cost-efficient pretreatment that can enhance sewage sludge stabilization, making its management and disposal safe. This study demonstrates the effectiveness of hydrodynamic cavitation in gradually disintegrating activated sludge and solubilizing dissolved organic matter, ultimately leading to a reduction in sludge particle size.
BIOREMEDIATION JOURNAL
(2022)
Article
Chemistry, Physical
Oscar Cotini, Rosa Di Maggio, Daniel Tonelli, Roger Nascimben, Narges Ataollahi
Summary: The study found that the continuous C-S-H nucleation in cement mortar changes the shape of capillary pores, improving impermeability. Adding superabsorbent polyacrylate can improve mortar flowability, but result in a different pore size distribution compared to standard mortar. Over time, permeability in air and water is affected by the presence of superabsorbent polyacrylate residues.
Article
Nanoscience & Nanotechnology
Himanshu Nautiyal, Paolo Scardi
Summary: Tin-based chalcogenides, especially the hexagonal Janus SnSSe monolayer, show potential as high-performing thermoelectric materials with ultra-low thermal conductivity and superior zT values under p-type doping condition.
Article
Chemistry, Physical
Ubaidah Syafiq, Eleonora Isotta, Narges Ataollahi, Ketan Lohani, Sally Luong, Vanira Trifiletti, Oliver Fenwick, Paolo Scardi
Summary: In this work, Cu/Zn/Sn-based ternary and quaternary chalcogenides inks were synthesized for the fabrication of thermoelectric generators (TEGs) using safe, low-cost, and abundant materials. The chalcogenide and AZO thin films were successfully coupled in a p-n device, with the CZTSe/AZO TEG exhibiting the highest power output. Factors affecting TEG performance, including composition, density, and secondary phases in the chalcogenide thin films, were investigated.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Eleonora Tomasino, Binayak Mukherjee, Narges Ataollahi, Paolo Scardi
Summary: This study investigates the interaction between a single monomer of polyamine and water molecules and hydroxide anions (OH-) at the atomistic level to understand the role of the polyamine structure in the hydrated morphology of anion exchange membranes (AEMs) for alkaline fuel cells. The results show that both OH- and water molecules tend to form water clusters in the vicinity of the ionized amine group, which serve as the preferential pathway for ionic conductivity. It is also highlighted that the water content plays an important role in enhancing conductivity and reducing degradation in an alkaline environment. This work provides a foundation for evaluating the impact of polymer chemistry on the ionic conductivity of the membrane and serves as the first step towards developing high-performance AEMs and improving the overall performance of fuel cells.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Physical
Binayak Mukherjee, Eleonora Isotta, Marcelo Augusto Malagutti, Ketan Lohani, Luca Rebuffi, Carlo Fanciulli, Paolo Scardi
Summary: High-energy reactive mechanical alloying was used to synthesize tetragonal and cubic polymorphs of Cu2ZnSnSe4, which exhibit ultra-low thermal conductivities. The cubic polymorph has a higher zT value in the low-temperature range, while the tetragonal polymorph has the highest zT value at high temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Green & Sustainable Science & Technology
Mohd Sukor Su'ait, Muhammad Ameerullah Sahudin, Norasikin Ahmad Ludin, Azizan Ahmad, Mohd Yusri Abdul Rahman, Hassan Ahmoum, Narges Ataollahi, Paolo Scardi
Summary: Organic dye sets a benchmark for dye-sensitized solar cells (DSSCs) application. Replacing organic dyes with inorganic phases poses a significant challenge. Surface modification techniques are considered key to improving DSSC efficiency. This study investigates the use of transition metal sulfides (TMS), specifically kesterite (Cu2ZnSnS4, CZTS), as an inorganic absorber layer for DSSCs. Results show that a lower molar ratio of CZTS compared to the N719 dye produces a stable DSSC with improved power conversion efficiency and incident photon-to-current efficiency. Higher concentrations of CZTS lead to instability and reduced performance.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Multidisciplinary
Himanshu Nautiyal, Ketan Lohani, Binayak Mukherjee, Eleonora Isotta, Marcelo Augusto Malagutti, Narges Ataollahi, Ilaria Pallecchi, Marina Putti, Scott T. Misture, Luca Rebuffi, Paolo Scardi
Summary: Copper-based chalcogenides are promising thermoelectric materials with high performance, tunable properties, earth abundance, and low toxicity. The study provides an overview of the thermoelectric properties of various polymorphs of Cu2SnS3, Cu2ZnSnS4, and Cu2ZnSnSe4 synthesized by high-energy reactive mechanical alloying. The disordered polymorphs exhibit phonon-glass-electron-crystal behavior and have enhanced electronic transport due to cationic disorder and nanostructuring.
Article
Energy & Fuels
Gianluca Maracchini, Rocco Di Filippo, Rossano Albatici, Oreste S. S. Bursi, Rosa Di Maggio
Summary: Fluorocarbons, which are banned due to their contribution to ozone depletion potential, continue to emit greenhouse gases in the environment from existing buildings. Proper disposal of CFCs/HFCs can limit their environmental impact. However, there is a lack of studies quantifying the achievable environmental savings in this case.
Article
Chemistry, Multidisciplinary
Robert Dinnebier, Paolo Scardi
Summary: This article is the second part of a series that focuses on describing and visualizing mathematical functions used to represent powder diffraction patterns for educational purposes. The first part discussed the contributions of instrumental and sample factors to the profile of a Bragg peak. The second part explores the mathematics and physics behind the intensity in X-ray powder diffraction, providing scholarly scripts using the Wolfram language in Mathematica.
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2023)
Article
Materials Science, Multidisciplinary
Mara Bruzzi, Naomi Falsini, Nicola Calisi, Paolo Scardi, Anna Vinattieri
Summary: CsPbCl3 perovskite films were prepared on flexible plastic substrates with interdigitated contacts using a novel one-step magnetron sputtering technique. The photoconductive response of the films with thicknesses of 500 nm and 1 μm to pulsed UV light at room temperature was tested. The CsPbCl3 films showed good performances in terms of signal stability, fast response to transient signal, detectivity, light dynamic range, and dark current noise.
Article
Nanoscience & Nanotechnology
Ketan Lohani, Himanshu Nautiyal, Narges Ataollahi, Umberto Anselmi-Tamburini, Carlo Fanciulli, Paolo Scardi
Summary: The effect of Ag doping on the thermoelectric properties of Cu2SnS3 (CTS) was investigated. Various Cu2Ag(x)Sn(1-x)S3 (0.05 <= x <= 0.25) samples were synthesized and their structural and transport properties were studied. The x = 0.15 sample showed a 10-fold higher power factor than the undoped CTS, and both the x = 0.125 and x = 0.15 samples exhibited the highest zT value of 0.8 at 723 K. The increase in thermal conductivity of Cu2Ag(x)Sn(1-x)S3 samples with Ag substitution was found to be caused by the reduction in scattering of phonons due to the incorporation of Ag. Formation energy calculations revealed the reason for the structural transformation of CTS and similar diamond-like structures towards high symmetry polymorphs by external doping. The increase in zT value was attributed to the optimization of the band gap and the weighted mobility.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Mario Calderon-Cueva, Eleonora Isotta, Megan Rylko, Binayak Mukherjee, Paolo Scardi, Alexandra Zevalkink
Summary: This work investigates the structural, elastic, and thermal behavior of the (GeSe)(1-x)-(AgBiSe2)(x) system to understand the contributions of chemistry and crystal structure to thermal transport. The study reveals an anomalous increase in thermal conductivity upon the transition to the cubic phase, which is associated with a large increase in the elastic moduli. Density functional theory calculations suggest that this change in stiffness is due to the tendency of Ge to exhibit strongly expressed lone-pair orbitals.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Marcelo Augusto Malagutti, Ketan Lohani, Mirco D'Incau, Himanshu Nautiyal, Narges Ataollahi, Paolo Scardi
Summary: In this study, CuFeS2 2D materials were successfully synthesized using a three-step approach of ball-milling, thermal evaporation, and sulfurization. The thin films were characterized using various methods, and the results showed that the interdiffusion of Cu and Fe during the evaporation process was facilitated by ball-milling mechanisms, high vacuum, and high energy density. The synthesis method demonstrated feasibility for thermoelectric applications and provided a new material option.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Varun Donnakatte Neelalochana, Eleonora Tomasino, Rosa Di Maggio, Oscar Cotini, Paolo Scardi, Stefano Mammi, Narges Ataollahi
Summary: This study presents an innovative solution to recycle PET bottles for the production of anion exchange membranes, reducing the demand for pristine materials and promoting circular economy and sustainability. The results show that the optimization of cationic functionalization significantly affects the ion exchange capacity, water uptake, and swelling ratio properties. The optimized AEM exhibits excellent ionic conductivity and alkaline stability. The analysis of membrane properties and degradation mechanisms contributes to the utilization of recycled materials in the field of AEM technology.
ACS APPLIED POLYMER MATERIALS
(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)
