Article
Materials Science, Multidisciplinary
Daijun Hu, Nicolo Grilli, Wentao Yan
Summary: A temperature dependent continuum dislocation dynamics (CDD) model is developed and fully coupled with a crystal plasticity solver for investigating the formation and stability of dislocation structures in solid solution materials. The dynamics of dislocation structure formation at different positions during laser melting process and the effect of cyclic thermal stress during multi-layer fabrication are revealed using a multiscale modeling approach.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Vignesh Vivekanandan, Peng Lin, Grethe Winther, Anter El-Azab
Summary: The continuum dislocation dynamics framework aims to capture the evolution of dislocation density and deformation of crystals under mechanical loading by solving transport equations for dislocations concurrently with crystal mechanics equations, incorporating dislocation reactions to improve predictability. The proposed formulation, which includes virtual dislocations to enforce dislocation line continuity, enables accurate enforcement of divergence free condition in numerical solutions, leading to highly accurate results in comparison with previous approaches.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Engineering, Manufacturing
Mehdi Hamid, M. Sadeq Saleh, Ali Afrouzian, Rahul Panat, Hussein M. Zbib
Summary: This study presents a multi-scale modeling approach to explain the unique behavior of silver micropillars printed and sintered using Aerosol Jet printing. The research found that grain size and dislocation density have a significant influence on the mechanical properties of metallic structures, rather than porosity.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Peng Lin, Vignesh Vivekanandan, Benjamin Anglin, Clint Geller, Anter El-Azab
Summary: The detailed model for jog formation and transport during plastic deformation of crystalline materials was developed within the vector density-based continuum dislocation dynamics framework, with a focus on the balance equations for point defect generation associated with jog transport. Results showed an asymmetry in vacancy and interstitial generation, and coupling the point defect generation mechanism to dislocation dynamics led to a higher hardening rate and dislocation density.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Qihong Fang, Weizheng Lu, Yang Chen, Hui Feng, Peter K. Liaw, Jia Li
Summary: The study develops a new general framework that combines atomic simulation, discrete dislocation dynamics, and crystal plasticity finite element method to investigate the strain-hardening behavior for multi-principal element alloys. The bottom-up hierarchical multiscale model couples the underlying physical mechanisms from the nano-micron-meso scales and captures the inhomogeneous strain field induced by serious lattice distortion, showing high accuracy and availability. This research provides insights into the relationship between multiscale microstructure and strain hardening, and offers a general approach to predict the mesoscopic mechanical response in multi-principal element alloys.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Engineering, Mechanical
Kyle Starkey, Anter El-Azab
Summary: We propose a computational algorithm for solving the finite-deformation continuum dislocation dynamics theory and demonstrate its effectiveness through various test problems.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Nilgoon Irani, Yaswanth Murugesan, Can Ayas, Lucia Nicola
Summary: Discrete dislocation plasticity is a modeling technique that treats plasticity as the collective motion of dislocations, with the core fields affecting edge dislocation interactions. Simulation results show that the influence of core fields is negligible compared to Volterra fields or external loads.
MECHANICS OF MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Carolina Espinoza, Vicente Salinas, Makarena Osorio, Edgar Pio, Claudio Aguilar, Fernando Lund, Nicolas Mujica
Summary: Knowledge of the state of plastic deformation in metallic structures is crucial for failure prevention. Non-destructive acoustic tests based on first order elastic constants have limitations when plastic deformations are heterogeneous or have small variations in elastic constants. Digital image correlation techniques combined with finite element modeling provide information about plastic deformation in the sample interior. This study demonstrates that the nonlinear Second Harmonic Generation method (SHG) can detect von Mises stress zones and plastic strain in aluminum pieces, indicating sensitivity to dislocation density. Experimental results align with Finite Element Method (FEM) modeling and are supported by X-ray Diffraction measurements (XRD).
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Review
Computer Science, Interdisciplinary Applications
Christian Gierden, Julian Kochmann, Johanna Waimann, Bob Svendsen, Stefanie Reese
Summary: This study provides an overview of the state-of-the-art finite element (FE) and FFT-based two-scale computational modeling of microstructure evolution and macroscopic material behavior.
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Cameron McElfresh, Jaime Marian
Summary: Recrystallization of metallic materials is a crucial treatment for transforming cold-worked alloys into a usable state. However, little is known about the combined effects of temperature, cold working amount, triple junction mobility, and level of recovery in the deformed microstructure on recrystallization kinetics. In this study, a comprehensive physical model combining crystal plasticity and grain boundary kinetics is developed to investigate static recrystallization in polycrystalline iron. The model reveals that the initial texture, defined by grain orientation and size distribution, is the dominant factor controlling recrystallization kinetics. Additionally, the amount of post-deformation recovery only has a limited impact on the evolution of the recrystallized microstructure.
Article
Nanoscience & Nanotechnology
Yongju Kim, Gang Hee Gu, Rae Eon Kim, Min Hong Seo, Hyoung Seop Kim
Summary: In this study, three-layer Al/steel/Al clad metal sheets were fabricated to investigate the enhanced mechanical properties of multilayered composites. The heterogeneous deformation mechanism was analyzed through experimental and computational approaches. The in-situ deformation behavior of the clad sheets was explored at micro/macro scales, and a physics-based constitutive model was developed to predict the mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Wenbin Liu, Lirong Chen, Long Yu, Jiaqi Fu, Huiling Duan
Summary: A continuum crystal plasticity framework incorporating a stochastic distribution model of critical resolved shear stress (CRSS) is developed to describe the formation of dislocation channels and further plastic flow localization in irradiated materials. The stochastic model successfully simulates the dislocation channel formation and plasticity localization in both irradiated single and polycrystalline copper (Cu), providing new insights for the study of plasticity localization in metals.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Nanoscience & Nanotechnology
Yongju Kim, Peyman Asghari-Rad, Jungwan Lee, Gang Hee Gu, Minji Jang, Olivier Bouaziz, Yuri Estrin, Hidemi Kato, Hyoung Seop Kim
Summary: The kinematic and isotropic hardening behavior of high and medium entropy alloys with a single-phase FCC structure was investigated. It was found that the cross-slip in FCC structures is influenced by fluctuations in the distribution of different atom species. The study used a solidsolution induced back-stress model to investigate the effects of dislocation forest stress and back-stress in a non-equiatomic medium entropy alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Jiaxiang Wang, Marko Knezevic, Manish Jain, Siddhartha Pathak, Irene J. Beyerlein
Summary: The study introduces a nanostructure-sensitive crystal plasticity model to analyze the strength of Mg/Nb nanocomposites, showing that BCC/BCC Mg/Nb nanocomposites exhibit higher strength compared to HCP/BCC nanocomposites. The model suggests that the BCC Mg phase contributes to strength by increasing the slip strengths of certain slip modes, and that the coherent interface presents less resistance to dislocation motion.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Jihye Kwon, G. M. Karthik, Yuri Estrin, Hyoung Seop Kim
Summary: Computational modeling is crucial for the development and application of metal additive manufacturing (MAM), allowing accurate simulation of the mechanical response of materials. A constitutive description was developed and validated using experimental data, demonstrating its applicability to a wide range of metal materials.
Article
Materials Science, Paper & Wood
Hakimeh Koochi, Jonatan Mac Intyre, Leevi Viitanen, Antti Puisto, Nahid Maleki-Jirsaraei, Mikko Alava
Summary: The aging behavior of TEMPO-CNF suspensions, which are fundamentally different from low-density gels, is investigated using rheological measurements and experiments. The aging effect is found to result in the logarithmic growth of the elastic modulus and a decrease in particle velocity. Based on experimental evidence, it is proposed that the aging effect in TEMPO-CNFs occurs due to the restructuring of fibrous elements and does not develop homogeneously across the whole sample.
Article
Materials Science, Paper & Wood
Isaac Y. Miranda-Valdez, Sebastian Coffeng, Yu Zhou, Leevi Viitanen, Xiang Hu, Luisa Jannuzzi, Antti Puisto, Mauri A. Kostiainen, Tero Makinen, Juha Koivisto, Mikko J. Alava
Summary: Foam-formed cellulose biocomposites with added organosolv lignin enhance the properties required for applications such as insulation, packaging, and cushioning. The addition of lignin increases Young's modulus, protects against bacterial growth, and improves surface hydrophobicity. The optimization of the foam composition offers a potential path for industrial-scale development.
Article
Materials Science, Paper & Wood
Leevi Viitanen, Isaac Y. Miranda-Valdez, Juha Koivisto, Antti Puisto, Mikko Alava
Summary: A more sustainable future requires bio-based alternatives to replace plastic foams for various applications. Research has shown that bio-based foams, fabricated using liquid foam templating and methyl cellulose as main constituents, have potential in packaging, insulation, and cushioning. However, scaling up production requires a comprehensive understanding of the foam's rheology during shaping and drying processes.
Article
Materials Science, Paper & Wood
Ari Jasberg, Antti Puisto, Ilona Leppaenen, Antti I. Koponen, Mikko J. Alava
Summary: The article discusses a method using polarization-sensitive optical coherence tomography as an online measurement tool for determining particle orientation in materials such as filaments and films. This tool enables better control and optimization of the manufacturing process.
Article
Materials Science, Multidisciplinary
K. Frydrych, F. J. Dominguez-Gutierrez, M. J. Alava, S. Papanikolaou
Summary: Recently developed CSAs are chemically disordered materials with high concentrations of multiple elemental species randomly arranged on a crystalline lattice. They possess excellent physical properties, making them attractive for industries operating in extreme environments. This paper presents a continuum plasticity model for equiatomic five-element CSAs, which captures the inherent disorder associated with lattice distortions through a single parameter alpha. Molecular dynamics simulations of different CSAs are performed to validate the proposed model, which is then applied to nanoindentation tests for various crystallographic orientations using the finite element method.
MECHANICS OF MATERIALS
(2023)
Article
Physics, Condensed Matter
F. Javier Dominguez-Gutierrez, Amil Aligayev, Wenyi Huo, Muralidhar Chourashiya, Qinqin Xu, Stefanos Papanikolaou
Summary: This study investigates the physisorption mechanisms of O2, H2O, CH4, and CO2 molecules on alumina and their effect on electronic properties. The results reveal the binding pathways of O, H, and C atoms in the various molecules to Al and O atoms on the alpha-alumina surface. Different adsorption sites and molecular orientations are examined and it is found that the most stable physisorbed state on the Al-terminated surface is located above the Al atom, while the Ox-terminated state is found above the oxygen, resulting in enhanced optical adsorbance. The findings provide important insights into the physisorption mechanisms of molecules on alumina and their impact on electronic properties.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
R. Alvarez-Donado, S. Papanikolaou, A. Esfandiarpour, M. J. Alava
Summary: High entropy alloys (HEAs) are multicomponent crystals with excellent physical properties that violate traditional thermodynamic rules. We use molecular simulations and rapid cooling protocols to investigate seven CSSs, determine their structural features and configurational entropy, and find that the entropic rule of mixing is not always accurate for predicting alloy formation. We propose a Kauzmann-like model to relate the order-disorder transition temperature T-OD of CSSs with their single-phase stability.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
E. Wyszkowska, C. Mieszczynski, L. Kurpaska, A. Azarov, W. Chrominski, I Jozwik, A. Esfandiarpour, A. Kosinska, D. Kalita, R. Diduszko, J. Jagielski, S. T. Nori, M. Alava
Summary: The radiation resistance of NixFe1-x single crystals was studied by irradiating them with Ni-58 ions and analyzing the resulting damage. It was found that the addition of iron reduced the formation of damage and increased the hardness of the alloy. Simulations showed that the presence of FeNi3 (L1(2)) phase contributed to the high hardness of the Ni0.62Fe0.38 alloy.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Mechanics
Juha Savolainen, Mikko Alava
Summary: The average velocity of an interface under sinusoidal driving in the creep region was studied, considering both short-range elastic systems and long-range elastic systems. For short-range elastic systems, a modified version of creep velocity with approximate power-law behavior and a material-dependent exponent was obtained, while simpler behavior was observed for long-range elasticity. The applicability of the model to fatigue fractures and the necessity of additional physics were discussed.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2023)
Article
Nanoscience & Nanotechnology
Kamran Karimi, Henri Salmenjoki, Katarzyna Mulewska, Lukasz Kurpaska, Anna Kosinska, Mikko J. Alava, Stefanos Papanikolaou
Summary: By training a graph neural networks (GNN) model with grain centers as graph nodes, we can predict the nanomechanical responses of nano-indented metal surfaces based on surface polycrystallinity. The GNN model uses grain locations and orientations as the sole input to make predictions of nano-hardness. The model's performance and dependence on various grain-level descriptors such as grain size and number of neighbors are explored.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Amir H. Naghdi, Kamran Karimi, Axel E. Poisvert, Amin Esfandiarpour, Rene Alvarez, Pawel Sobkowicz, Mikko Alava, Stefanos Papanikolaou
Summary: Recent experiments and atomistic simulations have shown that equiatomic NiCoCr solid solutions exhibit exceptional mechanical properties that may be linked to nanostructural short-range order (SRO) arising from thermal treatments. This study uses hybrid Monte Carlo-molecular dynamics simulations to further understand the thermal effects on SRO formation and edge dislocation plasticity mechanisms in equiatomic NiCoCr solid solutions. The results suggest that the presence of SROs enhances the roughening mechanism and leads to significant improvements in dislocation glide resistance, ultimately improving alloy strength through the interplay between nanoscopic SROs and atomic-level misfit properties.
Article
Chemistry, Applied
Isaac Y. Miranda-Valdez, Jesus G. Puente-Cordova, Flor Y. Renteria-Baltierrez, Lukas Fliri, Michael Hummel, Antti Puisto, Juha Koivisto, Mikko J. Alava
Summary: This paper explores the potential of using fractional calculus models to describe the viscoelastic properties of soft solids, focusing on methylcellulose aqueous systems. The results show that fractional calculus can accurately describe the rheological behavior of methylcellulose, particularly the frequency- and temperature-dependent rheology. Additionally, the study showcases how the use of one springpot can replace multiple spring-dashpot arrangements, simplifying the model. Lastly, the study finds that the thermogelation of methylcellulose involves the cooperative mobility of polymer chains and can be compared to the glass transition in polymers.
FOOD HYDROCOLLOIDS
(2024)
Article
Energy & Fuels
Isaac Y. Miranda-Valdez, Maryam Roza Yazdani, Tero Makinen, Sebastian Coffeng, Leevi Viitanen, Juha Koivisto, Mikko J. Alava
Summary: This study demonstrates that cellulose foams can exhibit solid-liquid phase change functionality by adding a phase change material during the foam forming process. The resulting cellulose phase change foams have low density, high Young's modulus, and excellent dimensional stability and thermal absorption capacity at specific temperatures. This opens up broad applications for the cellulose phase change foams as thermal insulators.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)