Article
Mechanics
Jong-Min Lee, Jin-Ha Hwang, Yun-Jae Kim, Jin-Weon Kim
Summary: This paper presents a numerical method for simulating ductile fracture of a cracked pipe using small punch test data, with parameters in the damage model extracted solely from small punch test data. The proposed method is validated by comparing simulation results with TP316L experimental data, showing good agreement in pipe tests and faster crack growth in compact tension tests. The effect of stress triaxiality on prediction accuracy is also discussed.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Engineering, Mechanical
Ki-Wan Seo, Jin-Ha Hwang, Yun-Jae Kim, Ki-Seok Kim, Poh-Sang Lam
Summary: This paper proposes a numerical methodology to predict the effect of hydrogen concentration on fracture toughness using small punch test data. The methodology performs finite element damage analysis based on a multi-axial fracture strain damage model. It derives a damage model from tensile and fracture toughness test data in air, determines the hydrogen-embrittlement constant by simulating the SP test in hydrogen, and predicts the fracture toughness of hydrogen-embrittled material. The methodology is validated using published test data of API X70 steel in hydrogen and air (or nitrogen) atmosphere.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Mechanics
Huan Sheng Lai, Xiaowei Jiang
Summary: In this study, the determination methods of fracture toughness of P91 material were studied using finite element simulation based on the Gurson-Tvergaard-Needleman (GTN) model. The results showed that the JIC of P91 could be accurately determined using the simulation of standard fracture toughness test based on the GTN model. When the small punch test (SPT) was used, a notched-plate specimen provided better results for determining the JIC of P91 compared to the other two methods. A notched-tube specimen of SPT was proposed for determining JIC of nuclear reactor fuel cladding tubes of P91. The simulation results indicated that the notched-plate specimen and the notched-tube specimen provided the same accuracy for determining JIC, and the determination method derived from the notched-plate specimen could be applied to the notched-tube specimen.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Chemistry, Multidisciplinary
Melissa Semaan, Victor Castex, Eneko Ruiz Arramendy, Manuel Paredes
Summary: This paper investigates how to improve the technique of fixing a punch to increase productivity and prevent parts from failing to be produced. By analyzing the tool and process using finite element analysis, it is found that improvements in geometry and fixing methods can increase tool lifespan.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Mechanical
G. H. Farrahi, A. Fallah, K. Reza Kashyzadeh
Summary: Petrochemical components, especially superheater internal parts, are affected by harsh conditions and destructive environments, which directly affect the mechanical behavior of the components. This study conducted a case study on failed bolts and found that they experienced creep phenomenon and hydrogen embrittlement. Mechanical properties were determined using small punch tests and finite element simulations, and it was found that the ultimate strength and fracture toughness of the bolts reduced compared to the raw situation.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Mechanics
Ki-Wan Seo, Yun-Jae Kim, Jin-Ha Hwang, Ki-Seok Kim
Summary: This paper presents a simulation method for combined ductile-brittle fracture of small punch (SP) test in hydrogen and applies it to test data of API X70 steel. The method uses a multi-axial fracture strain damage model determined from un-embrittled material and the hydrogen-embrittlement constant obtained from SP test in hydrogen to simulate ductile fracture. For brittle fracture simulation, the critical stress method is proposed, using the critical stress determined from the V notch round bar tensile test in hydrogen. The simulation successfully reproduces the load-displacement curve and the observed circumferential ductile cracking followed by radial brittle cracking in the SP test in hydrogen.
ENGINEERING FRACTURE MECHANICS
(2023)
Review
Materials Science, Multidisciplinary
Jonathan Torres, Ali P. Gordon
Summary: The Small Punch Test (SPT) was developed for evaluating materials in situations where the source material is scarce, lacking standardization, yet verified using traditional testing methods. Various methods exist to equate SPT results with conventional stress-strain data, but weaknesses such as fracture and fatigue approaches exist. Further research is focused on evaluating the suitability of SPT for additively manufactured (AM) materials and developing correlation equations between SPT results and conventional testing data for expediting material studies and optimization.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Engineering, Mechanical
Rhys Pullin, Ifan Jenkins, Anghel Cernescu, Allen Edwards
Summary: This article explores the use of acoustic emission technique in small punch tests to estimate unstable fracture initiation and corresponding punch displacement. Results confirm the potential of acoustic emission technique in detecting unstable cracking onset and accurately estimating equivalent biaxial fracture strain.
JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN
(2021)
Article
Engineering, Mechanical
Mortaza Otroshi, Gerson Meschut
Summary: This paper presents the characterization of damage and fracture behavior of HX340LAD Micro Alloyed steels using small punch test. Different punch geometries and cutting clearance are explored to observe the material's damage behavior under different loading conditions. Experimental investigations and numerical FEM simulations are conducted to identify crack initiation and stress state.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
Abdelwaheb Zeidi, Fatma Ben Saada, Khaled Elleuch, Hakan Atapek
Summary: This study aimed to analyze the damage of AISI D2 punch head, identifying main causes such as back up plate wear and fatigue, low toughness, poor heat treatment, and non-optimized punch-gun drill clearance. Various methods including SEM, EDS, XRD, and micro hardness were used to investigate different types of damaged punches and compare them. Improving punch design, optimizing clearance, and implementing new punch guiding solutions are essential in enhancing punching conditions and preventing premature tool damage.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Materials Science, Multidisciplinary
R. J. Lancaster, S. P. Jeffs, B. J. Haigh, N. C. Barnard
Summary: This paper compares the properties obtained from different test methods on various metallic materials and attempts to establish equivalent property relationships between them. The results help identify materials that can be correlated and explain why the relationship breaks down in certain materials.
MATERIALS & DESIGN
(2022)
Article
Engineering, Mechanical
Jie Wang, Yangyan Zheng, Xiang Ling
Summary: In this study, the microstructure and performance of an in-service 7-year-old furnace tube were compared with a new furnace tube using SPT. The feasibility of using SPT instead of uniaxial test was explored. The results showed that the microstructure, chemical elements, and hardness of the in-service furnace tube varied along the thickness direction. The SPT and small punch creep test revealed that the performance degradation was more severe at the inner and outer surfaces, with the outer surface being more severely damaged than the inner surface.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Yuichi Shintaku, Seiichiro Tsutsumi, Kenjiro Terada
Summary: This paper presents a continuum-damage-model-like constitutive law embedding cohesive cracks with plasticity-induced damage to represent the degradation of strength and ductility of steel under cyclic loading. The proposed model is able to predict the tensile strength and breaking elongation of steel after cyclic loading. Its validity is verified through experiments.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Engineering, Mechanical
Gyo-Geun Youn, Yun-Jae Kim, Jong-Sung Kim, Poh-Sang Lam
Summary: In this paper, a finite element simulation method based on the multi-axial fracture strain model is proposed to predict the effect of hydrogen embrittlement on fracture toughness in 21-6-9 stainless steel. The method is successfully applied to test data and shows close agreement with experimental results.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Chemistry, Physical
Dominik Glowacki, Wojciech Mocko, Michal Marczak, Anna Glowacka, Cezary Kraskiewicz
Summary: This paper presents the testing methodology of specimens made of layers of titanium alloy Ti6Al4V in dynamic impact loading conditions. Results show that as the number of layers of titanium alloy increases, the force required for damage initiation and the absorbed energy during plastic deformation also increase, displaying a close to linear relationship.
Article
Engineering, Mechanical
Alireza Golahmar, Christian F. Niordson, Emilio Martinez-Paneda
Summary: We propose a generalized phase field formulation for predicting high-cycle fatigue in metals. The formulation includes different fatigue degradation functions and new damage accumulation strategies to account for various factors. The numerical implementation uses an efficient quasi-Newton monolithic solution strategy and yields accurate predictions compared to experimental results.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Multidisciplinary
Leonel Quinteros, Enrique Garcia-Macias, Emilio Martinez-Paneda
Summary: We propose a computational framework for simulating the electromechanical response of self-sensing carbon nanotube-based composites undergoing fracture. The framework combines finite element modeling of electrical-deformation-fracture with a mixed micromechanics formulation to estimate the constitutive properties of these composites. The results demonstrate the potential of the framework in evaluating the influence of defects on the electromechanical response of smart structures at the meso- and macro-scales.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Kit Au-Yeung, Adria Quintanas-Corominas, Emilio Martinez-Paneda, Wei Tan
Summary: This paper investigates the effect of moisture content on the degradation behavior of composite materials. A coupled phase field framework considering moisture diffusion, hygroscopic expansion, and fracture behavior is developed. This multi-physics framework is used to explore the damage evolution of composite materials on the micro-, meso-, and macro-scales. The findings show that the mismatch between the hygroscopic expansion of fiber and matrix leads to interface debonding, increasing moisture content facilitates interface debonding, and moisture induces more damage on the longitudinal ply compared to the transverse ply. This work opens a new avenue for understanding and predicting environmentally assisted degradation in composite materials.
ENGINEERING WITH COMPUTERS
(2023)
Article
Computer Science, Interdisciplinary Applications
Chuanjie Cui, Rujin Ma, Emilio Martinez-Paneda
Summary: A new theoretical model based on phase field theory is proposed for predicting electro-chemo-mechanical corrosion in metals. The model combines electrolyte and interface electrochemical behavior with a phase field description of mechanically-assisted corrosion, including film rupture, dissolution, and repassivation. The theoretical framework is numerically implemented and freely available. Numerical experiments demonstrate that the model can accurately capture the influence of electrostatic potential, electrolyte concentrations, pit geometry, and passivation film strength on corrosion predictions.
ENGINEERING WITH COMPUTERS
(2023)
Article
Electrochemistry
Tim Hageman, Emilio Martinez-Paneda
Summary: Computational modelling of metal-electrolyte reactions is crucial but challenging due to numerical oscillations caused by dissimilar reaction rates. In this work, a lumped integration scheme that overcomes these oscillations is presented, allowing for larger time increments and simulations over longer time scales. The scheme is demonstrated by simulating hydrogen ingress, enabling predictions over years and practical applications.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
A. Zafra, G. Alvarez, G. Benoit, G. Henaff, E. Martinez-Paneda, C. Rodriguez, J. Belzunce
Summary: We investigated the effects of conducting hydrogen-assisted fatigue crack growth experiments in different environments on welded 42CrMo4 steel. The results showed significant differences between testing approaches and weld regions. Microscopy analysis and finite element modelling were used to explain these differences. Both testing approaches revealed higher susceptibility to hydrogen embrittlement in the heat affected zone, with similar microstructural behavior observed in both regions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
John A. Lewis, Stephanie E. Sandoval, Yuhgene Liu, Douglas Lars Nelson, Sun Geun Yoon, Runzi Wang, Ying Zhao, Mengkun Tian, Pavel Shevchenko, Emilio Martinez-Paneda, Matthew T. McDowell
Summary: Anode-free solid-state batteries demonstrate high energy density, and commercially relevant quantities of lithium can be plated reliably at moderate current densities using a sulfide solid-state electrolyte. The cycling stability of these batteries is limited by the nonuniform presence of lithium during stripping, leading to high local current densities and void formation. However, thicker lithium at the interface can improve resistance to short circuiting.
ADVANCED ENERGY MATERIALS
(2023)
Article
Engineering, Biomedical
Sasa Kovacevic, Wahaaj Ali, Emilio Martinez-Paneda, Javier LLorca
Summary: A phase-field model is developed to simulate the corrosion of Mg alloys in body fluids, capturing both uniform and pitting corrosion. The model takes into account the synergistic effect of aggressive environments and mechanical loading in accelerating corrosion kinetics. It has the potential to assess the service life and optimize the design of Mg-based biomedical devices, promoting the development of Mg alloys as biodegradable implant materials.
ACTA BIOMATERIALIA
(2023)
Article
Electrochemistry
Tim Hageman, Carmen Andrade, Emilio Martinez-Paneda
Summary: In this study, a new computational model is proposed to predict corrosion under charge-conservation conditions. The model captures the change in metal potential, reflecting the rates of corrosion and cathodic reactions in natural conditions. Finite element simulations reveal the significant influence of the charge-conservation assumption on corrosion rates and quantify them under realistic conditions. The results further show the strong coupling between corrosion rate and hydrogen/oxygen evolution reactions, the acidification of corrosion pits, and the sustainability of corrosion in the absence of oxygen.
ELECTROCHIMICA ACTA
(2023)
Article
Engineering, Mechanical
S. Lucarini, F. P. E. Dunne, E. Martinez-Paneda
Summary: A novel FFT-based phase-field fracture framework is proposed for modeling fatigue crack initiation and propagation at the microscale. The damage driving force is defined based on stored energy and dislocation density, linking phase-field fracture to microstructural fatigue damage. The formulation is numerically implemented using FFT methods allowing for modeling of large 3D microstructural regions. The simulation predicts crack paths, growth rates, and sensitivity to microstructural features.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Environmental
Alain Islas, Andres Rodriguez Fernandez, Covadonga Betegon, Emilio Martinez-Paneda, Adrian Panda
Summary: This study presents CFD simulations of biomass dust explosions using a newly developed experimental apparatus, and validates the CFD model's capability to capture transient effects. The results show excellent agreement between the model and experiments, highlighting the critical role of particle size in flame dynamics and the explosion itself. This model has great potential for future investigations of biomass dust explosions in larger-scale geometries.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Manufacturing
G. Alvarez, Z. Harris, K. Wada, C. Rodriguez, E. Martinez-Paneda
Summary: This article evaluates the influence of post-build processing on the hydrogen embrittlement behavior of additively manufactured (AM) 316L stainless steel. The results show that AM 316L exhibits lower ductility at room temperature, but comparable ductility to conventionally manufactured (CM) 316L at -50 degrees C. After hydrogen charging, the ductility of AM 316L is similar to or even better than CM 316L. Feritscope measurements indicate that this improved performance is related to the reduced propensity for AM 316L to form strain-induced martensite.
ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Mechanical
Charalampos Konstantinou, Emilio Martinez-Paneda, Giovanna Biscontin, Norman A. Fleck
Summary: In this study, microbiologically-induced calcium carbonate precipitation (MICP) was used to manufacture laboratory-scale specimens for fracture toughness measurement. The dependencies of mode I and mixed-mode fracture toughness on cementation, as well as their correlations with strength, permeability, and porosity, were investigated. A micromechanical model was developed to predict the relationship between mode I fracture toughness and the degree of cementation. The role of crack tip T-stress in determining kink angle and toughness under mixed mode loading was also determined.
EXTREME MECHANICS LETTERS
(2023)
Article
Chemistry, Physical
Huw C. W. Parks, Adam M. Boyce, Aaron Wade, Thomas M. M. Heenan, Chun Tan, Emilio Martinez-Paneda, Paul R. Shearing, Dan J. L. Brett, Rhodri Jervis
Summary: Understanding the characteristics of crack generation, formation, and propagation is crucial for understanding the degradation modes that lead to decline in battery performance.
JOURNAL OF MATERIALS CHEMISTRY A
(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)
