Article
Materials Science, Multidisciplinary
Xinyu Ren, Xinglong An, Song Ni, Yi Huang, Min Song
Summary: This study investigates the microstructural and hardness evolutions of an Mg-5.91Gd-3.29Y-0.54Zr alloy during high-pressure torsion (HPT). The results show that deformation twinning plays a crucial role in the grain subdivision process, with finer multiple twins formed in the area subjected to large plastic strain. Moreover, the maximum hardness obtained from this method is much higher than that achieved from other traditional plastic deformation methods.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Jing Wang, Xiaohu Li, Lu Han, Yuan Huang, Yongchang Liu, Zumin Wang
Summary: A primary drawback of nanocrystalline materials is their tendency to coarsen at elevated temperatures, which hampers their practical application. This study demonstrates that varying the biaxial strain in nanocrystalline films can significantly alter the grain-growth rate and allow for the control of nanograin sizes in these films. The thermal stability of nanocrystalline Ni and Ni-Mo films was found to be higher on Cu substrates than on W or Ni substrates, and the underlying mechanism of this substrate-dependent thermal stability was revealed through thermodynamic model calculations.
Article
Nanoscience & Nanotechnology
Jonathan Kong, Michel J. R. Hache, Jason Tam, Jonathan L. McCrea, Jane Howe, Uwe Erb
Summary: In this study, the Hall-Petch to inverse Hall-Petch transition of electrodeposited nanocrystalline Ni-32at%Co alloy was investigated. The transition was found to occur in the mid-stage of abnormal grain growth, with grain boundary relaxation governing the inverse Hall-Petch region. Late-stage abnormal grain growth and further normal grain growth led to a reduction in hardness in the Hall-Petch region. The segregation of sulfur impurities, crystallographic orientation, and annealed twin development did not significantly contribute to the observed change in hardness.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
B. C. Hornbuckle, K. Solanki, K. A. Darling
Summary: Adjusting the composition of copper-tantalum alloys can improve material stability and mechanical strength, making them potentially useful in high-temperature environments.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
N. N. Liang, R. R. Xu, G. Z. Wu, X. Z. Gao, Y. H. Zhao
Summary: A nanocrystalline high-entropy alloy was produced by high pressure torsion, and the evolution of microhardness and microstructure during subsequent isochronal annealing was studied. The alloy exhibited nano-grains and deformation nano twin lamella, which contributed to its hardness. Annealing below 600°C induced hardening without precipitation effect, while annealing above 600°C resulted in evident recrystallization and grain growth. The high thermal stability of the alloy was attributed to kinetic sluggish diffusion effect and deformation twin boundaries.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Sara I. Ahmad, Hicham Hamoudi, Atef Zekri, Khaled M. Youssef
Summary: The effect of adding small amounts of strontium and graphene nanoplatelets to nanocrystalline Al-Li alloy was investigated. The results show that the spontaneous reaction between strontium and graphene nanoplatelets at high temperatures leads to a decrease in thermal stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Hongbin Zhang, Jiawen Sun, Kang Chen, Haiping Zhou, Jianbo Jia, Zequn Wang, Yue Lu, Kuidong Gao, Wenhao Ma
Summary: The microstructure evolution and thermal stability of nanocrystalline AZ31-2.5 wt%VP magnesium matrix composites were investigated. The findings revealed that the composite maintained a nanocrystalline scale even after annealing at high temperatures, indicating excellent thermal stability. The uniformly distributed V particles in the magnesium matrix effectively inhibited grain growth and no new phases were formed. The hardness of the composite remained high even after annealing treatment.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Kodai Fukuta, Koichi Tsuchiya, Hidetoshi Miyazaki, Yoichi Nishino
Summary: Heusler-type Fe2V0.90+xTa0.10Al1-x alloys were processed using high-pressure torsion (HPT) to effectively decrease thermal conductivity and improve thermoelectric performance. Grain boundary segregation of Ta prevented grain coarsening during annealing, leading to grain refinement. Fe2V0.98Ta0.10Al0.92 exhibited improved thermoelectric performance, achieving one of the highest values ever reported for bulk Fe-2 VA1-based thermoelectric materials.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
Oliver Renk, Anton Hohenwarter, Verena Maier-Kiener, Reinhard Pippan
Summary: Pt and its alloys are widely used in catalysis and the jewelry industry. Severe plastic deformation and appropriate recovery annealing can enhance the hardness of the alloys, and the role of grain boundaries becomes more significant at the submicron scale.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
D. P. Rojas, J. I. Espeso, L. Rodriguez Fernandez, L. Fernandez Barquin
Summary: The study on nanocrystalline ceramic rare earth oxide Yb2O3 revealed a cubic crystallographic structure and an excess heat contribution at high temperature region. The antiferromagnetic contribution changed at low temperatures due to magnetic disorder arising from the size reduction process. Additionally, in the nanocrystalline state, broadening and shifts of the contribution of phonon modes to the Raman spectra, and a reinforcement of the anharmonic contribution were observed.
CERAMICS INTERNATIONAL
(2022)
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
Nanoscience & Nanotechnology
Pedro Henrique R. Pereira, Piotr Bazarnik, Yi Huang, Malgorzata Lewandowska, Terence G. Langdon
Summary: Experiments were conducted to investigate the flow behavior and microstructural stability of Al-3Mg-0.2Sc alloy treated with high-pressure torsion at different temperatures. The results indicate that the yield strength and microstructural stability of the alloy are influenced by the processing temperature. Additionally, evidence of dynamic strain aging was observed during annealing.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
S. Srinivasan, B. C. Hornbuckle, M. Chancey, K. A. Darling, Y. Q. Wang, K. Solanki
Summary: The self-ion irradiation behavior of nanocrystalline copper-tantalum alloys was investigated. It was found that Cu-10Ta undergoes significant microstructural evolution, while Cu-3Ta exhibits a relatively stable microstructural response and lower swelling.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Megumi Kawasaki, Jae-Kyung Han, Abel Szabo, Zoltan Hegedus, Jeno Gubicza, Pham Tran Hung, Janos L. Labar
Summary: This study investigated the thermal stability of a nanocrystalline CoCrFeNi multi-principal element alloy under different degrees of severe plastic deformation. It was found that the samples exhibited two exothermic peaks, which were related to the annihilation of dislocations and vacancies, as well as recrystallization.
Article
Chemistry, Physical
Yongpeng Tang, Mitsuhiro Murayama, Kaveh Edalati, Qing Wang, Satoshi Iikubo, Takahiro Masuda, Yuji Higo, Yoshinori Tange, Yasuo Ohishi, Masaki Mito, Zenji Horita
Summary: Through high-pressure torsion, a powder mixture of Al-Ti-Mg undergoes severe plastic deformation to achieve nanocrystalline structure and the formation of nanocrystalline intermetallics. Hardness increases with straining and further increases after annealing, despite grain coarsening.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Polymer Science
Denis Andzheevich Sapegin, Galina Nikolaevna Gubanova, Elena Nikolaevna Popova, Svetlana Viktorovna Kononova
Summary: The introduction of sulfonated polyimide into poly(amide-imide) matrices significantly increases membrane flux while decreasing overall process selectivity. Composite membranes with 1 wt% sulfonated polyimide exhibit improved membrane flux and comparable selectivity values, with a high separation factor achieved when separating methanol from a 3 wt% mixture with methyl-tert butyl ether at 52 degrees C.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
D. A. Sapegin, G. N. Gubanova, E. V. Kruchinina, A. Ya Volkov, E. N. Popova, M. E. Vylegzhanina, K. Setnickova, S. V. Kononova
Summary: This study discusses the relationship between the structural and morphological features of sulfonated co-polyimide and its selective transport properties. Experimental and theoretical studies show that the copolymer exhibits good separation performance.
Article
Materials Science, Multidisciplinary
T. M. Gapontseva, M. Degtyarev, L. M. Voronova, T. Chashchukhina, V. P. Pilyugin
Summary: The evolution of the initial single-crystal {110} Mo structure during high pressure torsion at 573 K undergoes two stages, leading to dynamic recrystallization and increased material hardness.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
P. Panfilov, T. P. Tolmachev, V. P. Pilyugin, Z. Chen, Z. L. Zhang
Summary: The deformation behavior of coarse-grained rhenium under high-pressure torsion at room temperature was examined, showing that this refractory HCP-metal exhibits ductile behavior and can withstand severe deformation, while forming an ultra-fine grain structure in the samples.
Article
Materials Science, Multidisciplinary
E. F. Talantsev, M. V. Degtyarev, T. I. Chashchukhina, L. M. Voronova, V. P. Pilyugin
Summary: This study introduces a piecewise model to analyze material hardness and true strain data during high-pressure torsion (HPT), revealing distinctive strain breakpoints and power-law exponents for different materials. The deduced power-law exponents for AISI 1020 and AISI 13B20 steels are remarkably close to each other within the full strain range, providing a new perspective on the evolution of micro/nanostructure during HPT.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Metallurgy & Metallurgical Engineering
M. G. Urazaliev, M. E. Stupak, V. V. Popov
Summary: Fourteen symmetric tilt boundaries with the < 110 > axis in Ni have been investigated by computer simulation, showing that their structures can be represented by a limited number of components and remain stable at elevated temperatures. Energies of formation of vacancies in grain boundaries have also been calculated.
PHYSICS OF METALS AND METALLOGRAPHY
(2021)
Article
Materials Science, Multidisciplinary
L. M. Voronova, T. Chashchukhina, T. M. Gapontseva, A. M. Patselov, V. P. Pilyugin, M. Degtyarev
Summary: The initial orientation of molybdenum affects its deformability, texture, and size of structural elements significantly only at the initial stages of deformation, with the (113) orientation being more stable to deformation. An increase in true strain above 6 completely neutralizes the effect of the initial orientation on structure development.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Kaveh Edalati, Andrea Bachmaier, Victor A. Beloshenko, Yan Beygelzimer, Vladimir D. Blank, Walter J. Botta, Krzysztof Bryla, Jakub Cizek, Sergiy Divinski, Nariman A. Enikeev, Yuri Estrin, Ghader Faraji, Roberto B. Figueiredo, Masayoshi Fuji, Tadahiko Furuta, Thierry Grosdidier, Jeno Gubicza, Anton Hohenwarter, Zenji Horita, Jacques Huot, Yoshifumi Ikoma, Milos Janecek, Megumi Kawasaki, Petr Kral, Shigeru Kuramoto, Terence G. Langdon, Daniel R. Leiva, Valery Levitas, Andrey Mazilkin, Masaki Mito, Hiroyuki Miyamoto, Terukazu Nishizaki, Reinhard Pippan, Vladimir V. Popov, Elena N. Popova, Gencaga Purcek, Oliver Renk, Adam Revesz, Xavier Sauvage, Vaclav Sklenicka, Werner Skrotzki, Boris B. Straumal, Satyam Suwas, Laszlo S. Toth, Nobuhiro Tsuji, Ruslan Z. Valiev, Gerhard Wilde, Michael J. Zehetbauer, Xinkun Zhu
Summary: This article comprehensively reviews recent advances in the development of ultrafine-grained and nanostructured materials through severe plastic deformation and provides a brief history of this field. Severe plastic deformation methods have been effective in producing materials with advanced mechanical and functional properties, and the field of NanoSPD has experienced significant progress in the past two decades.
MATERIALS RESEARCH LETTERS
(2022)
Article
Chemistry, Physical
V. V. Popov, M. E. Stupak, M. G. Urazaliev
Summary: The <110> symmetric tilt grain boundaries in niobium were studied using computer simulation methods. The structure and energies of the boundaries, as well as the energies of vacancy formation within them, were calculated. The dependence of vacancy formation energies on various factors was analyzed. The stability of the boundaries at elevated temperatures was investigated using molecular dynamics, and the coefficients of grain-boundary self-diffusion were calculated for the three most stable tilt boundaries.
JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION
(2022)
Article
Metallurgy & Metallurgical Engineering
V. V. Popov, E. Osinnikov, R. M. Falakhutdinov
Summary: Grain boundaries in ultrafine-grained niobium deformed by high-pressure torsion were studied using Mossbauer emission spectroscopy. It was found that the grain boundaries were in a nonequilibrium state with excess free volume after severe plastic deformation. Annealing altered the state of the grain boundaries, bringing them closer to that of coarse-grained materials.
PHYSICS OF METALS AND METALLOGRAPHY
(2022)
Article
Metallurgy & Metallurgical Engineering
M. G. Urazaliev, M. E. Stupak, V. V. Popov
Summary: In this study, the properties and stability of two symmetric tilt boundaries in hexagonal close-packed titanium were investigated using computer simulation. It was found that one of the boundaries remained stable at high temperatures, and the grain-boundary diffusion coefficients were close to experimental values.
PHYSICS OF METALS AND METALLOGRAPHY
(2022)
Article
Metallurgy & Metallurgical Engineering
L. Yu Egorova, Yu Khlebnikova, V. P. Pilyugin, N. N. Resnina
Summary: The research focused on the reverse omega -> alpha phase transformation in titanium and zirconium under deformation, revealing that the reverse phase transformation in titanium occurs at lower temperatures and within a narrower temperature range compared to that in zirconium. Additionally, characteristics such as the temperature of the onset of reverse phase transformation and released thermal energy stabilize when a mixed nano- and submicrocrystalline structure forms in both metals at a certain true strain.
PHYSICS OF METALS AND METALLOGRAPHY
(2022)
Article
Metallurgy & Metallurgical Engineering
V. V. Popov, E. Osinnikov
Summary: The Mossbauer emission spectroscopy was used to investigate the mechanisms of grain-boundary diffusion and segregation of Co-57 in polycrystalline Nb. It was found that Co atoms diffuse along the grain boundaries of niobium by the interstitial mechanism. The relative intensity of spectral lines with temperature was analyzed and the grain-boundary segregation factor of Co in Nb was calculated, with comparisons to previous studies on Sn grain-boundary diffusion and segregation in Nb.
PHYSICS OF METALS AND METALLOGRAPHY
(2021)
Article
Metallurgy & Metallurgical Engineering
B. A. Greenberg, M. A. Ivanov, V. P. Pilyugin, M. S. Pushkin, T. P. Tolmachev, A. M. Patselov
Summary: A mechanism for the consolidation of brittle quartz powder particles under high-pressure torsion is proposed, based on the destruction of silicon-oxygen tetrahedra through breakage of Si-O interatomic bonds. The emergence of tetrahedra and their fragments on the surface determines surface shape and adhesion, while an enhancement of external action results in the healing of broken Si-O bonds, leading to partial or complete consolidation.
RUSSIAN METALLURGY
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
Alexey Stolbovsky
Summary: Analysis of structure evolution of niobium processed by high pressure torsion at cryogenic temperatures and its thermal stability has been carried out, showing that the structure is less stable at higher annealing temperatures, leading to recrystallization and formation of new grain groups.
MATERIALS TODAY-PROCEEDINGS
(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)