Article
Materials Science, Multidisciplinary
Mikhail S. Kishchik, Andrey G. Mochugovskiy, Maxence Cuda, Anna A. Kishchik, Anastasia V. Mikhaylovskaya
Summary: The influence of the fraction of coarse undeformed particles on the microstructure evolution and mechanical properties of alloys processed by isothermal multidirectional forging (MDF) was investigated. Al-Mg-Ni-Sc-Zr-based alloys with different Ni concentrations and a fraction of Al3Ni particles were subjected to MDF at 350 degrees C. The results showed that the Al3Ni phase particles stimulated the nucleation of recrystallized grains and contributed to the formation of an ultrafine-grained structure, resulting in improved mechanical properties.
Article
Nanoscience & Nanotechnology
Dongqing Zhao, Guanyu Li, Peiliang Li, Jixue Zhou, Kaiming Cheng, Yunteng Liu, Yuansheng Yang, Junpeng Duan, Reza Ghomashchi, Xitao Wang
Summary: The study compared the microstructures and mechanical properties of extruded Mg-xCa/Mn/Ce alloys and pure Mg, finding that addition of Ca, Mn, and Ce could achieve fine grain sizes. The addition of Ca, Mn, or Ce also affected the textures of the alloys. Mg-0.5Ca/Mg-2Mn and Mg-1Ce showed better mechanical properties compared to pure Mg. These results suggest that conventional extrusion can produce fine-grained Mg-xCa/Mn/Ce alloys with improved mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Yanqiang Li, Hongxiang Jiang, Hao Sun, Lili Zhang, Jie He, Jiuzhou Zhao
Summary: A theoretical model was developed to investigate the microstructure evolution during the solidification of a liquid-solid phase separation alloy under the influence of electric current pulses (ECPs). Experimental and simulation results demonstrated that ECPs can enhance melt convection through Joule heating, induce migration of minority phase particles, and effectively promote their nucleation and refinement. The peak current density of ECPs and the temperature drop in the nucleation region were found to be crucial parameters determining the refinement extent of minority phase particles.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Z. Fan, F. Gao, Y. Wang, H. Men, L. Zhou
Summary: Grain refinement is crucial for enhancing mechanical performance and controlling cast defects in metallic materials. Despite extensive historical research, there are still critical questions unanswered.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Lili Zhao, Liping Wang, Lei Wang, Yicheng Feng, Rui Fan, Sicong Zhao, Yuanke Fu
Summary: This study investigated the synergistic effects of Y and Nd on the grain refinement of the as-cast Mg-Y-Nd-Al alloy. The best refinement was achieved when the Y and Nd contents were 3% and 4% respectively. Y and Nd played different roles in the grain refinement process, with Al2RE phase facilitating heterogeneous nucleation and Al11RE3 phase being unfavorable for it.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Feng Gao, Zhongyun Fan
Summary: This study focuses on the competition among different types of solid particles during the solidification process of metallic materials. Numerical calculations using a solidification model reveal that the competition for nucleation is strongly influenced by the nucleation undercooling of the particles, while the competition for grain initiation is closely related to the sizes of the solid particles.
Article
Materials Science, Multidisciplinary
Nilam S. Barekar, Ivan Skalicky, Shihao Wang, Pavel Shurkin, Onuh Adole, N. Hari Babu, Martin Jarrett
Summary: This paper presents the first trial of using a novel Al-Ni-B grain refiner in the manufacturing of Al-Si wrought piston alloys. The results show that the addition of Nb-B inoculant leads to a refined as-cast structure and a more homogenous distribution of the solute. However, billet homogenization affects the precipitation and properties, and non-homogenized specimens perform better during machining and tensile testing.
Article
Materials Science, Multidisciplinary
Hengbin Liao, Liling Mo, Xiong Zhou, Zhizhong Yuan, Jun Du
Summary: This study revealed the nucleation and grain refinement mechanism of Mg-Al alloy induced by Fe impurity. It was found that the Al2Fe phase is the only available nucleating site which leads to the refinement of α-Mg grains in the presence of Fe impurity.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Zhongyun Fan, Feng Gao
Summary: This paper provides an overview of the processes of heterogeneous nucleation and grain initiation in the early-stage solidification, and discusses the impacts of grain initiation behavior under different conditions on grain refinement.
Review
Metallurgy & Metallurgical Engineering
Z. Fan, F. Gao, Y. Wang, S. H. Wang, J. B. Patel
Summary: This paper provides a comprehensive overview of grain refinement of Mg-alloys using native MgO particles. It shows that intensive melt shearing can make more native MgO particles available for grain refinement, and other exogenous particles are not more effective than native MgO.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Shenbao Jin, Zhenjiao Luo, Xianghai An, Xiaozhou Liao, Jiehua Li, Gang Sha
Summary: This research investigates the effects of alloy composition on dynamic precipitation, segregation, and grain refinement under severe-plastic-deformation processing of Al-Si alloys. Si atoms segregate at dislocations and form Si precipitates at grain boundaries, impacting grain size significantly.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Review
Materials Science, Multidisciplinary
Feng Gao, Zhongyun Fan
Summary: Grain refinement is crucial for metallic materials as it improves castability, reduces casting defects and enhances mechanical properties. Solute is widely recognized as one of the key factors for achieving grain refinement, but the phenomenon is complex and also depends on the physical and chemical nature of nucleant particles.
Article
Materials Science, Multidisciplinary
Fenglong Zhai, Rui Fan, Yicheng Feng, Liping Wang
Summary: By adding Sm element, the recrystallization behavior of the aluminum alloy was improved, leading to enhanced strength and deformation microstructure. Moreover, Sm can promote the formation of eta' phase and inhibit the conversion of eta' phase to eta phase, further increasing the strength of the alloy. Grain refinement and finely dispersed precipitates in the modified alloy contribute to the reduction of crack nucleation and stress concentration, resulting in improved ductility.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Suhas Eswarappa Prameela, Peng Yi, Yannick Hollenweger, Burigede Liu, Joey Chen, Laszlo Kecskes, Dennis M. Kochmann, Michael L. Falk, Timothy P. Weihs
Summary: Magnesium alloys have great potential for structural applications due to their low density. The addition of other elements improves their mechanical properties and corrosion resistance. The formation of solute clusters and precipitates in the magnesium matrix significantly affects the alloy's plastic response. Plastic deformation during thermomechanical processing also impacts the formation of solute clusters and precipitates. This paper discusses the improvement of mechanical properties in magnesium alloys and strategies for optimizing microstructures.
MECHANICS OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Sebastian Samberger, Irmgard Weissensteiner, Lukas Stemper, Christina Kainz, Peter J. Uggowitzer, Stefan Pogatscher
Summary: This study presents age-hardenable, fine-grained AlMgZnCu crossover alloys intended for superplastic and quick plastic forming processes. These alloys utilize T-phase (Mg32(Al,Zn)49) to refine the grain structure and increase age-hardening. The study demonstrates the importance of particle stimulated nucleation (PSN) using T-phase particles, which leads to a fine grain size as low as 4 μm. The resulting alloys have excellent high-temperature forming properties and high stability.
Article
Metallurgy & Metallurgical Engineering
Ho-Gil Choi, Seungwoo Choi, Min-Kyung Kim, Juyoung Jang, Ki Tae Nam, In-Ho Jung, Kyung-Woo Yi
Summary: Molten oxide electrolysis can be used to reduce carbon dioxide emissions from ironmaking by electrochemically decomposing iron oxide into iron and oxygen. Experimental results show that this method can achieve high cathodic current efficiency and high purity of reduced iron under the applied electrolysis conditions.
IRONMAKING & STEELMAKING
(2021)
Article
Thermodynamics
Zhimin You, In -Ho Jung
Summary: Thermodynamic modeling of the Mn-P and Fe-Mn-P systems using the CALPHAD method successfully predicted the formation processes and thermodynamic properties of various phosphides through critical evaluation of phase equilibrium and thermodynamic data.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2021)
Article
Thermodynamics
Jian Wang, Zhang Zhang, In-Ho Jung, Liyuan Sheng
Summary: In this study, the isothermal sections of the Mg-Sn-Sr ternary system at high Mg content were determined using SEM/EDS, confirming the existence of the MgSnSr ternary compound and discovering two new compounds. Thermodynamic optimization was conducted on the Sn-Sr binary and Mg-Sn-Sr ternary systems with the CALPHAD technique.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2021)
Article
Materials Science, Ceramics
Jaesung Lee, Tiantian Yin, Pierre Hudon, In-Ho Jung
Summary: The phase diagram of the SnO2-SiO2 system revealed a eutectic reaction and lack of solid solution between SiO2 and SnO2. Through thermodynamic optimization based on experimental data, a new diagram was constructed and applied to simulate evaporation and condensation phenomena in float glass making process.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Sun Yong Kwon, In-Ho Jung
Summary: The optimized Gibbs energies of all phases in the Al2O3-ZrO2, CaO-Al2O3-ZrO2, and Al2O3-SiO2-ZrO2 systems were obtained by evaluating and assessing the available thermodynamic and phase diagram data. Key phase diagram experiments were conducted to predict and reproduce the experimental data.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
JoonHyun Nam, Marie-Aline Van Ende, In-Ho Jung
Summary: This study conducted thermodynamic analysis on the production of ferromanganese alloy in a submerged arc furnace at high temperature, and studied the slag fluxing strategy to improve manganese yield in the process. Additionally, a simulation model was developed to evaluate the energy balance and pre-reduction efficiency of the ore in the process.
Article
Thermodynamics
Min-Kyung Kim, In -Ho Jung
Summary: The liquidus in the Na2O-B2O3-Fe2O3 system in air was determined experimentally at different temperatures, and thermodynamic optimizations were carried out for the binary and ternary systems. All reliable experimental phase diagram data were successfully reproduced within the experimental error limit. Predictions of the ternary Na2O-B2O3-Fe2O3 system in air were made based on the thermodynamic models with optimized parameters.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Yoongu Kang, Min-Kyu Paek, In-Ho Jung
Summary: This study thermodynamically assessed the Mo-C, Mo-N, and Mo-C-N systems using the Calculation of Phase Diagram (CALPHAD) method, and significantly improved the description of the phase diagrams and thermodynamic data by optimizing the model parameters.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Metallurgy & Metallurgical Engineering
Zhimin You, Mingze Ran, Zhouhua Jiang, Min-Kyu Paek, In-Ho Jung
Summary: The thermodynamic behavior of nitrogen (N) in the Fe-Cr-Mn-C-N liquid solution is modeled using the Modified Quasichemical Model with consideration of short-range ordering. New model parameters for the Fe-Cr-Mn-C-N liquid solution are determined based on an evaluation of experimental data. The solubility of N in the Fe-Cr-Mn-C-N system is optimized for various temperatures and N-2 pressures, and the thermodynamic properties of N in Fe-based liquid solution affected by alloying elements are calculated from the developed thermodynamic database.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Guishang Pei, Junyi Xiang, In-Ho Jung, Mengjiao Jiao, Zhuoyang Li, Xuewei Lv
Summary: A Ca5Mg4V6O24 compound was synthesized through solid-state roasting routes and its crystal structure and thermodynamic properties were determined. The compound crystallizes in cubic space group Ia3d with a = 12.442 +/- 0.001 angstrom. X-ray photoelectron spectroscopy confirmed the presence of vanadium in the +5 state. The melting point of Ca5Mg4V6O24 was found to be 1442 K. The molar heat capacity (374 J mol K-1) and entropy (688.2 J mol K-1) at 298.15 K were determined using physical properties measurement system and simultaneous thermal analyzer for the first time. The solubility of Ca5Mg4V6O24 in water at different temperatures was measured, and its dissolution behavior in sulfuric acid and kinetics were experimentally established.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Seungjoo Baek, In-Ho Jung
Summary: The phase diagram of the MgO-Y2O3-MgF2-YF3 system was studied for the first time using experimental techniques and thermodynamic modeling. No ternary or quaternary crystalline phase was observed, and the eutectic reactions in the system were identified. The overall phase diagram was calculated using the CALPHAD method.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Zhimin You, Hao Zhang, Senlin Cui, Zhouhua Jiang, In-Ho Jung
Summary: Thermodynamic modeling of the Si-P and Si-Fe-P systems was performed using the CALPHAD method. The liquid and solid solutions were described using the Modified Quasichemical Model and Compound Energy Formalism, respectively. The phase boundaries and Gibbs energies were reoptimized and carefully determined to resolve discrepancies in previously assessed phase diagrams of the Si-Fe-P system.
Article
Materials Science, Ceramics
Jaesung Lee, In-Ho Jung
Summary: The phase diagram of the Na2O-Al2O3-ZrO2 system was experimentally studied and thermodynamically modeled, providing important information about the system's phase equilibria and thermodynamic properties.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Xiaofei Zhu, Yulei Zhang, Jian Zhang, Tao Li, In-Ho Jung, Yangyang Su, Wenhan Gai
Summary: A composite coating containing B2O3 glass was prepared on SiC-coated C/C composites to enhance their oxidation resistance at temperatures ranging from 1173 to 1773 K. Borosilicate and SiO2 glasses acted as oxygen barriers at different temperature ranges. The addition of Hf-oxides ceramic particles improved the thermal stability and crack resistance of the glass layer. The composite coating effectively protected the C/C composites against oxidation, with mass gains ranging from 3.77 g·m(-2) to 21.41 g·m(-2) after exposure to high temperatures.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Engineering, Manufacturing
Catherine Dolly Clement, Julie Masson, Abu Syed Kabir
Summary: This study analyzes the effect of heat treatment on the microstructure and mechanical properties of the widely used AlSi10Mg aluminum alloy in additive manufacturing. The results show that it is difficult to completely dissolve the silicon-rich second phase particles during heat treatment, which significantly affects the mechanical characteristics. The evolution of iron-rich particles in the aluminum matrix may also have a significant influence on the alloy's mechanical properties.
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING
(2022)
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)
