Article
Materials Science, Multidisciplinary
Yuanqi Jiang, Ping Peng
Summary: This study investigates the tensile fracture behavior of Al based metallic glasses (MGs) under different engineering strain rates using molecular dynamics (MD) simulations. The results show that higher engineering strain rates lead to longer periods of plastic deformation and shorter crack lengths. It is observed that the Al amorphous with notch gradually crystallizes during tensile fracture, and there are differences in crystallization, atomic arrangement, and microstructure in different regions with different engineering strain rates. The crack propagation mainly occurs along hexagonal-close-packed (HCP) grain boundaries between face-centered-cubic (FCC) crystal blocks, and the velocity of crack propagation increases with increasing engineering strain, leading to brittle fracture. The existence of HCP and FCC atoms in Al based MGs during tensile deformation is effectively demonstrated. The analysis also reveals a positive correlation between the engineering strain rate and the strain of maximum entropy. The formation of cavitation ahead of crack can be attributed to the migration of atoms from higher entropy cavity regions to lower entropy crystallization regions. This study enriches the traditional tensile deformation theories and offers new insights into the physical origins of cavitation in the crack tip of MGs.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Polymer Science
Qiaoyu Wang, Jianbin Wang, Anheng Wang, Chaoqun Zhou, Jiale Hu, Fei Pan
Summary: This study aims to analyze the effects of temperature and strain rate on the tensile properties of long glass fiber-reinforced polypropylene composites. The experimental results show that both tensile strength and tensile fracture stress increase significantly at a temperature of 25°C and strain rates of 10(-4), 10(-3), 10(-2), and 10(-1) s(-1). On the other hand, these properties decrease significantly when the strain rate is fixed at 10(-4) while temperatures range from -25°C to 75°C. Cracks appear on the fracture surface at lower temperatures, while matrix softening occurs at higher temperatures. These findings emphasize the significant influence of both strain rate and temperature on high fiber content long glass fiber-reinforced polypropylene composites.
Article
Construction & Building Technology
Yu Wan, Ruzhuan Wang, Yumeng Liu, Shan Zhou, Hongwei Cai, Mingyu Gu, Dingyu Li, Weiguo Li
Summary: This study develops a series of novel temperature-dependent theoretical models based on the force-heat equivalence energy density principle and classical concrete fracture theories to determine the fracture properties of concretes. The models establish a quantitative relationship between the high-temperature tensile fracture strength, compressive fracture strength, and characteristic length of concretes and the basic material parameters. The fracture properties of concretes with different aggregate types, fiber-reinforced concretes, and ordinary Portland cement-based concretes are predicted and analyzed using the proposed models, showing good agreement with experimental measurements.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Jian Jiang, Zhifang Zhang, Jiyang Fu, Karthik Ram Ramakrishnan, Caizheng Wang, Hongxu Wang
Summary: This paper combines molecular dynamic simulation and machine learning techniques to predict the mechanical properties of graphene reinforced aluminium nanocomposites and modify the Halpin-Tsai model. The study considers the effects of graphene's volume fraction, alignment angle, chirality, and environment temperature on the properties. Machine learning models are developed and optimized using the simulation data to estimate the Young's modulus and ultimate tensile strength. The modified Halpin-Tsai model provides significantly improved accuracy for determining the Young's modulus of graphene-reinforced aluminium nanocomposite structures.
MATERIALS & DESIGN
(2022)
Article
Mechanics
Qinyuan Yao, Pan Dong, Ziyuan Zhao, Ziyuan Li, Tianqi Wei, Jun Qiu, Weiguo Li
Summary: With the increasing application of rubber in various fields, there is a growing demand for quantitative characterization of the mechanical properties of rubber materials at different temperatures. In this study, a strain energy expression that includes tensile fracture strength was derived based on the Mooney-Rivlin hyperelastic constitutive model, and a temperature dependent model for tensile fracture strength without fitting parameters was developed using the Force-Heat Equivalence Energy Density Principle. The model showed good agreement with experimental results over a wide temperature range, and a quantitative analysis of the effect of elastic modulus on tensile fracture strength at different temperatures was conducted. Based on these findings, some useful suggestions for selecting rubber materials for a wide temperature range were proposed.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Chemistry, Multidisciplinary
Mowen Niu, Chongxiao Cui, Rui Tian, Yushun Zhao, Linlin Miao, Weizhe Hao, Jiaxuan Li, Chao Sui, Xiaodong He, Chao Wang
Summary: This study investigates the mechanical and thermal properties of CNTs under tension-torsion loading, revealing that the fracture strength, Young's modulus, and thermal conductivity of CNTs decrease with increasing twist angle.
Article
Materials Science, Multidisciplinary
Bo Li, Zhengyun Zhang, Xiaolong Zhou, Manmen Liu, Yu Jie
Summary: The Au/AuAl alloy interface model was simulated using classical molecular dynamics, and the deformation behavior and dislocation evolution were studied in detail. The results show that the initial stress is negative due to lattice mismatch, and the plastic deformation leads to the formation of micro-voids and cracks. The fracture occurs preferentially in the Al matrix, and the interface cracks propagate in the AuAl alloy region during tension. The increase in strain also leads to an increase in dislocation density.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Babak Mousavi, Alireza Sadeghirad, Vahid Lotfi
Summary: This paper investigates the applicability of nonlinear fracture mechanics (NLFM) to describe the fracture behavior of graphene. The fracture properties and criteria of graphene have not been fully understood yet, and the current understanding is mostly limited to linear elastic fracture mechanics (LEFM) investigations.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Mechanics
B. R. Abhiram, Debraj Ghosh
Summary: Nanofillers tend to agglomerate inside the matrix of a polymer nanocomposite, which modifies the crack propagation mechanism and adversely affects the fracture properties. Reactive molecular dynamics simulations were conducted to study the effects of agglomeration on fracture properties of polymethyl methacrylate (PMMA) with carbon nanotube (CNT) reinforcement. It was found that agglomerated CNTs do not improve the fracture toughness even with functionalization, and they contribute to strain accumulation and failure of the nanocomposite at a lower global strain level.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Mechanics
Chuan Zhang, Yongtai Pan, Yankun Bi, Xingjian Cao
Summary: Existing theories on the energy consumption of comminution mainly focus on the macroscopic and mesoscopic scales, neglecting the microscopic scale. In this study, a molecular dynamics simulation was conducted to investigate the energy evolution of the comminution process at the atomic scale. Results showed that mineral morphology and load direction have a significant impact on crack propagation behavior and energy efficiency.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Materials Science, Multidisciplinary
Cheng-Da Wu, He-Xing Li
Summary: The molecular dynamics simulations show that the potential energy of Cu-Zr systems significantly decreases with increasing Zr concentration, leading to enhanced structural stabilization. Additionally, doping Zr atoms at the grain boundaries can strengthen the boundaries and decrease their mobility during the tensile test. Moreover, the Young's modulus of Cu-Zr systems decreases with increasing Zr concentration, while the plasticity of Cu-Zr systems increases.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Polymer Science
Cut Rahmawati, Sri Aprilia, Taufiq Saidi, Teuku Budi Aulia, Agung Efriyo Hadi
Summary: This study investigated the effect of natural nanosilica on the mechanical properties and microstructure of geopolymer cement. The addition of 2 wt% nanosilica in the geopolymer paste significantly improved compressive strength, flexural strength, and fracture toughness but decreased direct tensile strength. Microstructure analysis showed the formation of C-A-S-H gel and the development of a compact and cohesive geopolymer matrix with the addition of 2 wt% nanosilica.
Article
Materials Science, Multidisciplinary
DongXu Wen, ChenXin Gao, ZhiZhen Zheng, Kang Wang, YiBo Xiong, JiaKai Wang, JianJun Li
Summary: The hot tensile behavior of a low-alloyed ultra-high strength (LUHS) steel was studied, and the effects of tensile processing parameters on the hot tensile behaviors and fracture characteristics were comprehensively discussed. A dislocation density based constitutive model was constructed and improved by considering plastic damage, showing high stress under low tensile temperatures or high strain rates. Ductile fracture with dimples was the dominant fracture type, and the model was found to be preferred for reconstructing the hot tensile behaviors of the studied steel.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Cheng-Da Wu, Kai-Wei Liu
Summary: This study investigates the effects of voids and temperature on the fracture behavior of Cu/Cu3Sn bilayers during tensile tests using molecular dynamics simulations. The simulation results reveal that the failure of non-voided bilayers is caused by the collapse of the layer interface, while the failure of voided bilayers is influenced by both the interface collapse and the growth of the pre-existing void. The Young's modulus of the bilayers decreases significantly with increasing temperature.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Cheng Hou, Xiaochao Jin, Litao Zhao, Pan Li, Xueling Fan
Summary: In this paper, the tensile strength and fracture toughness of ZrB2-SiC ceramic were obtained from three-point bending tests using the boundary effect model (BEM). The results show that these mechanical properties can be simply predicted based on the BEM method, and the grain sizes, tensile strength, and fracture toughness of the ceramic follow a normal distribution law.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Mechanical
K. V. Khishchenko, A. E. Mayer
Summary: Non-uniform temperature fields are analyzed in problems involving impact, ramp loading, and shock waves passing through different materials interfaces. Theoretical analysis and computations show the presence of high-entropy and low-entropy layers near interfaces during shock loading. Molecular dynamics simulations support the formation of high-entropy layers during impact.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Mechanical
Alexander E. Mayer, Vasiliy S. Krasnikov, Victor V. Pogorelko
Summary: In this study, a theory on homogeneous nucleation of dislocations was developed to predict plasticity incipience in FCC single crystals. The energy barrier of nucleation was found to only include the line defect energy of the critical loop, emphasizing the importance of balancing various energetic contributions. Through molecular dynamics simulations and artificial neural networks, the theory was validated and shown to be applicable in predicting nucleation thresholds under different conditions.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Materials Science, Multidisciplinary
Polina N. Mayer, Alexander E. Mayer
Summary: In most cases, uniformly dissolved hydrogen does not change the tensile strength of aluminum significantly; alumina can significantly reduce the tensile strength of solid aluminum, but the decrease is less significant in a molten state; the presence of non-collapsing hydrogen bubbles in the aluminum melt causes a sharp decrease in tensile strength.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Engineering, Mechanical
Alexander E. Mayer
Summary: The micromechanical model developed in this study can describe the deformation of metal powder under different compression states, including compression stage, percolation transition of pore system, and collapse stage of pores. By using molecular dynamics simulations, it was found that dislocation activity is the main driver of plastic deformation of metal nanoparticles during compaction, and the presence of twins was observed in copper and magnesium nanoparticles.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Chemistry, Multidisciplinary
Vasiliy S. Krasnikov, Alexander E. Mayer, Victor V. Pogorelko, Marat R. Gazizov
Summary: The study investigates the prolonged plastic deformation of aluminum containing theta' phase using a multistage approach combining MD, CM, and DDD. It is found that damage to the crystal structure of inclusions and activation of cross-slip of dislocation segments lead to a decrease in acting stresses in the MD system. The softening effect of inclusions is further introduced into the dislocation-precipitate interaction, causing a decrease in flow stress during deformation.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Egor S. Rodionov, Victor G. Lupanov, Natalya A. Gracheva, Polina N. Mayer, Alexander E. Mayer
Summary: Taylor impact tests and numerical methods were used to study the dynamic plasticity of cold-rolled OFHC copper. The experimental part revealed the existence of pore-like structures and refinement of grain structure in the deformed parts of the sample. The numerical modeling included a dislocation plasticity model and an artificial neural network to optimize the material model for cold-rolled OFHC copper.
Article
Materials Science, Multidisciplinary
V. S. Krasnikov, M. R. Gazizov, A. E. Mayer, P. A. Bezborodova, V. V. Pogorelko, R. O. Kaibyshev
Summary: The effect of precipitate hybridization on macroscopic strengthening in aluminum alloys was investigated using a multiscale approach. The results showed that the shear strength of the alloy with hybrid precipitates was 20% higher than that for non-hybrid plates.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Alexander E. Mayer, Vasiliy S. Krasnikov
Summary: This study investigates the nucleation of dislocations in copper single crystals under different pressure ranges. Artificial neural networks are trained to approximate material properties and improve the accuracy of the dislocation nucleation theory.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Alexander E. Mayer, Mikhail Lekanov, Natalya A. Grachyova, Eugeniy Fomin
Summary: In this study, molecular dynamics simulations were used to explore the deformation behavior of copper single crystal under different loading paths, and the obtained data was utilized to develop a machine-learning-based model for copper's elastic-plastic deformation. Artificial neural networks approximated the elastic stress-strain relation, as well as the thresholds for homogeneous nucleation of dislocations, phase transition, and the initiation of spall fracture. The plastic portion of the MD curves was used to calibrate the dislocation plasticity model, enabling the application of the developed constitutive model to simulate shock waves in thin copper samples under dynamic impact.
Article
Materials Science, Multidisciplinary
Polina N. Mayer, Victor V. Pogorelko, Dmitry S. Voronin, Alexander E. Mayer
Summary: In this study, a mechanical model of spall fracture of copper is developed and verified, which covers both solid and molten states. The optimal parameters of the model are identified using a machine-learning-type Bayesian algorithm. The influence of initial size distribution of pores or non-wettable inclusions on the strain rate dependence of spall strength in copper is analyzed. This investigation contributes to the development of atomistically-based machine learning approaches in understanding the strength properties of metals and deepening the understanding of the spall fracture process.
Article
Materials Science, Multidisciplinary
Alexander E. E. Mayer, Polina N. N. Mayer, Mikhail V. V. Lekanov, Boris A. A. Panchenko
Summary: By studying the plastic flow behavior of nanoporous metals under tension using molecular dynamics simulations and artificial neural networks, a possible framework for constructing mechanical models of spall fracture in metals has been proposed.
Article
Chemistry, Physical
Egor S. Rodionov, Victor V. Pogorelko, Victor G. Lupanov, Polina N. Mayer, Alexander E. Mayer
Summary: Current progress in numerical simulations and machine learning allows for the identification of parameters in plasticity models using complex loading conditions. A combined experimental-numerical approach is developed and applied to the study of cold-rolled OFHC copper. Profiled projectiles are proposed for the Taylor impact problem for the first time for material characterization, which allows for large plastic deformations with high strain rates. The optimized numerical model is successfully validated using experimental data.
Article
Mechanics
N. A. Gracheva, M. Lekanov, A. E. Mayer, E. Fomin
Summary: A technique has been developed using artificial neural networks to describe the relationship between stresses, strains, and the onset of plastic flow in metal single crystals. The datasets for training are generated using molecular dynamics modeling, showing promising results in simulating shock wave propagation and studying dislocation nucleation.
MECHANICS OF SOLIDS
(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)