Article
Nanoscience & Nanotechnology
Dianguang Liu, Kewei Wang, Ke Zhao, Jinling Liu, Linan An
Summary: This study systematically investigated the tensile creep of 3 mol% Y2O3 stabilized tetragonal ZrO2 ceramics under a DC field. The results showed that the deformation mechanism of the material strongly depended on the current density and applied stress. Exceptionally large uniform elongation can be obtained when the creep is dominated by dislocation accommodated grain-boundary sliding.
SCRIPTA MATERIALIA
(2022)
Review
Materials Science, Multidisciplinary
Roberto B. Figueiredo, Megumi Kawasaki, Terence G. Langdon
Summary: The grain size and grain boundary density have significant effects on the flow stress of metallic materials. The Hall-Petch grain refinement strengthening effect, which is a linear relationship to the inverse of the square root of the grain size, has been well-established for more than 70 years. However, grain refinement softening can occur at high homologous temperatures and both effects have been treated separately. Recent research has shown that a general relationship can explain both the Hall-Petch strengthening effect at low temperatures and superplasticity at high temperatures. This review discusses recent advances in structural and mechanical characterization and provides an updated analysis of the relationship between grain size and flow stress.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Anastasia V. Mikhaylovskaya, Olga A. Yakovtseva, Andrey G. Mochugovskiy, Joan Cifre, Igor S. Golovin
Summary: The influence of a minor addition of Zn on the superplastic properties of Al-Mg alloys was investigated. It was found that the addition of a small amount of Zn can promote grain boundary sliding, resulting in increased strain rate sensitivity and elongation-to-failure of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Guotong Zou, Lingying Ye, Jun Li, Zhixin Shen
Summary: The microstructure evolution and superplastic deformation mechanisms of a 2A97 Al-Cu-Li alloy with initial banded grains were studied. Uniaxial superplastic tensile tests were conducted and surface studies were carried out to investigate the deformation mechanisms. The results showed that the banded grains transformed into equiaxed grains during deformation, and the deformation process could be divided into two stages, with intragranular dislocation slip dominating in the primary stage and grain boundary sliding dominating in the secondary stage.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Anastasia V. Mikhaylovskaya, Olga A. Yakovtseva, Natalia Yu. Tabachkova, Terence G. Langdon
Summary: During superplastic deformation of microduplex-structured brasses, strain primarily occurs in the beta-phase through grain boundary sliding and dislocation slip/creep mechanisms. Dynamic recrystallization and twinning transform the initial coarse beta-phase grains into ultrafine grains, and alloying with Al improves superplastic behavior and reduces residual cavitation.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Hyun-Bin Jeong, Seok-Won Choi, Seok-Hyeon Kang, Young-Kook Lee
Summary: The new high-strength Fe-10Mn-3.5Si steel exhibits superplasticity at lower temperatures, showing different microstructural and deformation features compared to previous superplastic steels, and is suitable for practical applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
A. Mikhaylovskaya, O. A. Yakovtseva, A. Irzhak
Summary: The superplastic forming technique is used for producing complex shaped lightweight constructions by achieving extremely high plastic deformation mainly through grain boundary sliding. Studies have shown that fine-grained commercial Al-Mg based alloys exhibit unusually weak grain boundary sliding and increased contributions of accommodation mechanisms during the initial stage of superplastic deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Qing Zhang, Xiaofei Ju, Jun Liu, Lei Wang, Yang Li, Haowei Wang, Zhe Chen
Summary: The addition of TiB2 nanoparticles as reinforcement in Al-Zn-Mg-Cu composite leads to the formation of fine-equiaxed grains, which enhances both the elongation and thermal stability of the material. The deformation at grain boundaries is controlled by grain boundary sliding mechanism, and the stress release and prevention of cavitation are facilitated by locally melted Mg-rich phases.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Zeinab Savaedi, Hamed Mirzadeh, Rouhollah Mehdinavaz Aghdam, Reza Mahmudi
Summary: Shear punch testing was used to evaluate the superplasticity of a hot rolled fine-grained Mg-3Zn-0.5RE-0.5Zr (ZEK300) alloy. The alloy exhibited regions I, II, and III of deformation behavior typical of superplastic materials, with a grain size of 4.5 μm. In region II, the strain rate sensitivity indices of the ZEK300 alloy were determined to be 0.51, 0.48, and 0.41 at temperatures of 350, 400, and 450 degrees C, respectively. The average activation energy of 87.6 kJ mol-1 suggests that grain boundary sliding (GBS) facilitated by grain boundary diffusion is the dominant deformation mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Metallurgy & Metallurgical Engineering
A. Rezaei, R. Mahmudi, R. E. Loge
Summary: The microstructure of the extruded Mg-6Gd-3Y-1.5Ag alloy was refined through ECAP processing, resulting in improved superplastic behavior.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
M. Esmaeili Ghayoumabadi, A. G. Mochugovskiy, N. Yu Tabachkova, A. Mikhaylovskaya
Summary: This study aimed to improve the superplastic formability of Alloy AA6013 by refining its grain structure and controlling grain growth at elevated temperatures. Minor additions of Y, Sc, and Zr were considered. The results showed that the additions led to a noticeable refinement of the grain structure and the formation of dispersed particles. These effects inhibited recrystallization and dynamic grain growth, resulting in grain refinement and achieving superplasticity in the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Hyun-Bin Jeong, Jin-Young Lee, Ju-Chan Jin, Hyung-Jin Cho, Young-Kook Lee
Summary: In this study, a Fe-Mn-Si-Ni steel was developed to exhibit superplasticity at a low temperature and a high strain rate, while maintaining remarkable room-temperature tensile strength and total elongation. The excellent superplasticity was achieved by grain boundary sliding at the boundaries of fine gamma grains, which were prevented from coarsening by Fe5(Mn,Ni)3Si2 and (Fe,Mn,Ni)3Si precipitates.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Geochemistry & Geophysics
Chao Qi, David L. Goldsby
Summary: The study investigates the dislocation creep of ice through deformation experiments, finding that the characteristic exponent n of ice dislocation creep is influenced by grain size and strain rate, and providing two flow laws for modeling different types of ice.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Materials Science, Multidisciplinary
Jianheng Cai, Hua Wang, Cheng Qiu, Genghua Cao, Datong Zhang
Summary: ZK60 magnesium alloy is refined through submerged friction stir processing (SFSP), leading to the observation of high-strain-rate superplasticity (HSRS) at elevated temperature. The excellent HSRS is attributed to the uniform fine-grained structure and the relatively high fraction of high-angle grain boundaries, which facilitate grain boundary sliding. Additionally, the presence of dispersed fine particles/precipitates enhances the microstructural stability of the specimens.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
A. Rezaei, R. Mahmudi, C. Cayron, R. E. Loge
Summary: In this study, a Mg-6Gd3Y-0.5Ag magnesium alloy was processed using simple shear extrusion (SSE) technique to refine its microstructure. The research found that continuous dynamic recrystallization was the dominant recrystallization mechanism, and the alloy processed with 6 SSE passes exhibited superplastic flow, with grain boundary sliding being the prevalent deformation mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Olga A. Yakovtseva, Andrey I. Bazlov, Alexey S. Prosviryakov, Nadezhda B. Emelina, Natalia Yu. Tabachkova, Anastasia V. Mikhaylovskaya
Summary: The microstructure, phase composition, and hardness evolutions of high-energy ball milled Al-15.3%Mn-6.2%Cu alloy and alloy matrix composites with 2% and 5% Al2O3 fine particles were investigated. The milling process dissolved the non-equilibrium phase CuAl2 and equilibrium phase Al20Cu2Mn3, resulting in a decrease in the lattice parameter and microhardness of aluminum. Further milling time and annealing of pre-milled samples led to the decomposition of the solid solution and precipitation of the Mn-enriched phase. The addition of Al2O3 particles refined the particles, increased the microhardness, and promoted the dissolution of phases and precipitation of the Mn-enriched phase, improving the precipitation hardening effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
A. M. Balagurov, S. V. Sumnikov, J. Cifre, V. V. Palacheva, D. G. Chubov, I. S. Golovin
Summary: In this study, in situ neutron diffraction and internal friction techniques were combined to comparatively analyze the structural and functional properties of Fe-26Al alloy. The results revealed the relationship between thermal treatments, microstructure, phase transformations, and anelastic (internal friction) properties of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
C. C. Li, Z. H. Xia, X. G. Qiao, I. S. Golovin, M. Y. Zheng
Summary: The study investigated the influence of Mn content (0.4, 0.8, 1.2 wt.%) on the microstructure and mechanical properties of as-extruded dilute binary Mg-Mn alloys. Increasing Mn content resulted in a decrease in the volume fraction and size of dynamically recrystallized (DRXed) grains. Segregation of Mn atoms and nano alpha-Mn dynamical precipitates were observed at the grain boundaries, with the amount of precipitates increasing with Mn content. Tensile tests showed that Mn content significantly affected mechanical properties, with the Mg-0.8 wt.% Mn alloy exhibiting excellent ductility at room temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Ahmed O. Mosleh, Olga A. Yakovtseva, Anna A. Kishchik, Anton D. Kotov, Essam B. Moustafa, Anastasia V. Mikhaylovskaya
Summary: Friction stir processing (FSP) is a promising technique for refining grains and improving mechanical properties. This study compared an FSP-ed Al-Mg-Sc-Zr alloy with fine nanoscale Al-3(Sc,Zr) precipitates and an alloy modified with both Al-3(Sc,Zr) and coarse Al9FeNi-phase particles. The results showed that both secondary-phase particles and FSP parameters influenced the microstructure, mechanical properties, and superplasticity of the alloys. The modified alloy exhibited an improvement in ultimate tensile strength and elongation-to-fracture compared to the reference alloy, thanks to the effective grain refinement provided by the fine Al-3(Sc,Zr) and coarse Al9FeNi particles.
Editorial Material
Chemistry, Physical
Igor S. Golovin, Francesco Cordero
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
N. Fazel, F. Gasser, I. S. Golovin, M. Mouas, J. -g. Gasser
Summary: Resistivity studies were conducted for the first time to investigate the kinetics of the first order transition between two closed packed phases (ferromagnetic L12 and paramagnetic D019) in Fe3Ga-type alloy. The inexpensive and accurate method used allowed for the observation of slow kinetic (micro-)structural transformations over several days. The coexistence temperature range of these phases in Fe-27Ga alloy was determined to be 595-606 degrees Celsius, and the kinetics of the L12H D019 transitions were analyzed.
Article
Nanoscience & Nanotechnology
Anton D. Kotov, Maria N. Postnikova, Ahmed O. Mosleh, Anastasia V. Mikhaylovskaya
Summary: The superplastic deformation behavior, strain-induced microstructure evolution, and post-deformation mechanical properties of Ti-4Al-1V-1Fe-1Ni-0.1B-xMo alloys (x = 1, 2.5, or 5 wt%) were investigated. It was found that 5% Mo content significantly improved the β-phase fraction, m-value, δ-value at low temperature (625°C), as well as the post-forming tensile mechanical properties at room temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Review
Chemistry, Physical
Igor S. S. Golovin
Summary: This review focuses on the magneto-elastic properties of Fe-Ga alloys, particularly their magnetostriction in low saturation magnetic fields. The anelastic properties of these alloys, including frequency, amplitude and temperature dependencies, are analyzed. Special attention is paid to anelasticity caused by phase transitions, and comparison between Fe-Ga, Fe-Al alloys and the effect of RE elements is discussed.
Article
Materials Science, Multidisciplinary
Anatoly M. Balagurov, Nataliya Yu. Samoylova, Sergey V. Sumnikov, Valeria V. Palacheva, Igor S. Golovin
Summary: A neutron diffraction study was conducted on a Fe3Ge alloy, uncovering the magnetic and structural phase transformations in a wide temperature range. The technique of complementary x-ray diffraction and Rietveld method allowed for accurate characterization of the magnetic properties of the alloy. The study revealed two ferromagnetic phases with different critical temperatures, as well as the temperature dependence of the magnetic moment components.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
V. V. Palacheva, M. Yu. Zadorozhnyy, A. V. Mikhaylovskaya, P. A. Petrov, I. S. Golovin
Summary: Structural-induced anelasticity in AA5051 alloy was analyzed under two different treatment schemes: simple compression and compression combined with torsion. Anelasticity caused by structural transitions was studied using temperature, time, and amplitude-dependent tests. The sample subjected to compression combined with torsion exhibited a higher thermodynamical stimulus for recrystallization and higher dislocation density, resulting in a faster decrease in dislocation density during instant heating and isothermal annealing. The Avrami kinetics parameters for isothermal recrystallization and activation parameters for grain boundary relaxation after recrystallization were calculated.
Article
Metallurgy & Metallurgical Engineering
A. A. Kishchik, S. A. Aksenov, M. S. Kishchik, D. O. Demin, A. Yu. Churyumov, A. V. Mikhaylovskaya
Summary: The effects of isothermal multidirectional forging (IMF) on the grain structure, second-phase particles of solidification origin, and dispersoids in the Al-4.9Mg-0.9Ni-0.9Fe-0.2Zr-0.1Sc alloy were investigated. The results showed that the strain distribution during forging has a significant influence on the alloy properties. A new method for constructing stress-strain curves was proposed to accurately characterize the mechanical behavior of the material. Additionally, increasing the number of phase cycles resulted in a reduction in the size of solidification-origin phase particles and a finer grain structure.
PHYSICS OF METALS AND METALLOGRAPHY
(2023)
Article
Materials Science, Multidisciplinary
Sayed M. Amer, Maria V. Glavatskikh, Ruslan Yu. Barkov, Alexander Yu. Churyumov, Irina S. Loginova, Maxim G. Khomutov, Andrey V. Pozdniakov
Summary: Low sensitivity to hot cracking is crucial for both casting and ingots of wrought alloys. The study investigated the microstructure, precipitation, hot deformation behavior, and mechanical properties of a novel Al-Cu-Y-Mg-Cr-Zr-Ti-Fe-Si alloy. The alloy exhibited high solidus temperature, narrow solidification range, and fine microstructure. The addition of eutectic forming elements improved resistance to hot cracking but decreased plasticity. The alloy showed good deformation behavior and mechanical properties after aging treatment.
Article
Physics, Multidisciplinary
J. Goeken, N. Saba, I. S. Golovin
Summary: Wood has high specific strength but is dimensionally unstable due to variable water content. Its strength decreases with increased water content. The damping capacity of wood significantly affects its acoustic properties and is influenced by temperature and moisture content. The study of damping under load and varying moisture content is lacking, but understanding it could drive the substitution of environmentally harmful materials with wood.
ROMANIAN JOURNAL OF PHYSICS
(2023)
Article
Metallurgy & Metallurgical Engineering
M. G. Khomutov, A. V. Pozdniakov, M. V. Glavatskikh, R. Yu. Barkov, A. Yu. Churyumov, A. Ya. Travyanov
Summary: The microstructure and strength changes of Al-4.5%Zn-4.5%Mg-1%Cu-0,12%Zr-0,1%Sc alloy during annealing after hot deformation at temperatures ranging from 300 to 450 degrees C were investigated. Recrystallization hardly occurred during annealing, and softening was not observed at 350 and 400 degrees C, as confirmed by microstructural studies. Annealing at 450 degrees C resulted in a reduction of yield strength due to an increased proportion of recrystallized volume. The structure formed through hot and cold rolling, as well as subsequent annealing, had a significant impact on sheet ageing kinetics compared to an ingot.
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)
