Article
Chemistry, Physical
Shangcheng Zhou, Ruizhi Jian, Yao-Jian Liang, Yichao Zhu, Benpeng Wang, Liang Wang, Lu Wang, Yang Ren, Yunfei Xue
Summary: A novel WHA with strong susceptibility to ASB, using a precipitation-hardening HEA as the binding phase of W particles, was reported in this work. The formation of nanoscale L1(2) precipitates and high dislocation density contribute to a high dynamic yield strength of approximately 2300 MPa. Additionally, a narrow ASB with a width of about 12 μm was observed in the novel WHA, showing a great susceptibility to ASB.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Qinglei Zeng, Tao Wang, Shengxin Zhu, Hao-sen Chen, Daining Fang
Summary: In this work, a phase-field model is proposed to simulate dynamic shear band formation and successfully captures the nucleation of shear bands. The capability of the model in capturing shear band formation in various scenarios is validated through strain-based and stress-based criteria.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Review
Materials Science, Multidisciplinary
Russell A. Rowe, Paul G. Allison, Anthony N. Palazotto, Keivan Davami
Summary: This review paper discusses the formation and propagation of adiabatic shear bands (ASBs) in nickel-based superalloys. ASBs are a unique dynamic phenomenon that precedes catastrophic failure in many metals under impact or ballistic loading. Their formation is due to the thermo-mechanical instability induced by competitive work hardening and thermal softening processes. Understanding the formation conditions of ASBs in nickel-based superalloys is important for extending the life of machining tools and ensuring the reliability of high-temperature applications.
Article
Engineering, Mechanical
Diego Mateos, Solomon Boakye-Yiadom
Summary: Cubic uniaxial compression and angled cubic biaxial shear-compression specimens were used to develop empirical data for models such as the Generalized Incremental Stress State Dependent Damage Model (GISSMO) with a strain-rate dependent extension. Digital Image Correlation (2D-DIC) was employed to track strain evolution and fracture initiation. The angled specimens exhibited a higher tendency to form adiabatic shear bands (ASBs) at lower strains. It was also found that ASBs were harder than the pre-impact microstructure.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Lei Zhang, Xun Chen, Yufeng Huang, Wensheng Liu, Yunzhu Ma
Summary: The study found that under high strain rates, the deformation behavior of 90W-Ni-Fe alloy changes from homogeneous plastic deformation to localized shear deformation, forming adiabatic shear bands (ASBs). Additionally, the microstructure in the ASBs undergoes significant dynamic recrystallization.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
X. X. Chen, J. P. Ligda, B. E. Schuster, L. J. Kecskes, Q. Wei
Summary: This study examines the microstructure and mechanical properties of bulk samples formed through diffusion bonding, with a focus on their behavior under high strain rates. It is suggested that diffusion bonding could be a promising and scalable fabrication approach for UFG/NC bcc refractory metals in desired applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Multidisciplinary
Wei-Li Song, Quan Ma, QingLei Zeng, ShengXin Zhu, MingBin Sui, TangQing Cao, Wei Qi, YinQiang Chen, XiaoQi Yu, YunFei Xue, Hao-Sen Chen
Summary: This study investigates the mechanism of dynamic shear banding in a BCC HEA HfNbZrTi, and finds that in this material, dynamic shear banding is primarily controlled by damage softening, with thermal softening playing a secondary role.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Mirtunjay Kumar, N. P. Gurao, Anish Upadhyaya
Summary: In this study, the evolution of microstructure and crystallographic texture of a two-phase tungsten heavy alloy during cold rolling was investigated. The results showed that the matrix phase accommodates more strain in the early stages of deformation, but exhausts its work hardening ability as deformation progresses, resulting in the formation of micro-shear bands. The tungsten phase exhibited large orientation gradients, flattening, and elongation of grains. At higher rolling reductions, extensive shear bands spanning across tungsten particles and the matrix were observed, which had implications on the evolution of the crystallographic texture.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
L. Choisez, G. Roy, P. J. Jacques
Summary: The study observed adiabatic shear banding at very large speed during the unstable fracture of Ti-12 wt% Mo alloy under quasi-static loading. Various models were compared to analyze the phenomenon, highlighting the importance of shear band thickness and shearing time.
MATERIALS & DESIGN
(2021)
Article
Engineering, Mechanical
Qinglei Zeng, Manxi Chen, Xiaoqi Yu, Wei Qi, Shengxin Zhu, Heng Yang, Hao-Sen Chen
Summary: Adiabatic shear band (ASB) is an important failure mechanism observed in metals and alloys under impact loading, with a two-dimensional propagating feature. However, in-situ characterization of temperature-deformation fields during ASB formation is challenging due to the small scales involved. In this study, a plane-array infrared imaging system and microspeckle-based digital image correlation technique were used to obtain the two-dimensional features of ASB evolution in titanium alloy specimens. Experimental characterization and simulation results were used to analyze the thermo-mechanical aspects of ASB formation.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Hao Zhang, Hui Peng, Xiao-Yang Pei, Jian-Ying Wu, Ping Li, Tie-Gang Tang, Ling-Cang Cai, Yi Li, Hai Liu
Summary: In this work, a unified phase field theory for two coupled fracture types is proposed. This theory considers the coupling behavior between different fracture types and is consistent with the single fracture type theory when one type of fracture is suppressed. A double phase-field model for coupled spall and adiabatic shear banding is realized with this unified phase field theory, which can be used to predict the potential failures in ductile metals under dynamic loading. The entire damage and fracture evolution, including damage evolution, crack expansion, and fragmentation, can be captured with this modeling framework.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Nanoscience & Nanotechnology
Selim Kim, Min Cheol Jo, Tae Won Park, Jinhee Ham, Seok Su Sohn, Sunghak Lee
Summary: In this study, SHPB tests were conducted on 2139 and 7056 Al alloys to investigate their dynamic compressive properties and ASB formation behavior. The results showed that 7056 alloy had a higher susceptibility to ASB formation, lower critical strain for initiating ASBs, and lower resistance to ASB formation compared to 2139 alloy. This was consistent with the better ballistic performance of 2139 alloy observed in V-50 ballistic impact tests.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Manufacturing
J. Q. Zhang, B. B. He, B. Zhang
Summary: In this study, the transition of failure mode in single-crystalline silicon under varied machining speeds was analyzed using molecular dynamics simulations. It was found that at ultra-high machining speeds, the formation of jetted chips occurred and was attributed to the shock pressure induced by chip inertia. The study provides insights into the underlying mechanisms of chip formation at ultra-high machining speeds.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Mechanics
Shweta Sharma, V Shankar, Yogesh M. Joshi
Summary: This study analyzes the transient dynamics of viscoelastic flows during shear start-up, focusing on the onset of shear banding using different models and methods. The results suggest that there is no universal connection between the overshoot and subsequent decay of shear stress and the unstable eigenvalues obtained from stability analysis, making it difficult to predict transient shear banding based solely on shear stress behavior. Additionally, the study highlights the importance of considering factors that may affect the transient phenomena observed during shear start-up.
JOURNAL OF RHEOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Vikram Phalke, Samuel Forest, Hyung-Jun Chang, Arjen Roos
Summary: In this study, finite element simulations were conducted on hat-shaped specimens made of face-centered cubic (FCC) metallic single and poly-crystals. The aim was to investigate strain localization phenomena, particularly adiabatic shear band (ASB) formation, under adiabatic conditions. The results showed the effectiveness of the micromorphic crystal plasticity model in overcoming the limitations of classical plasticity models and predicting the grain size effect in polycrystalline specimens.
MECHANICS OF MATERIALS
(2022)
Article
Materials Science, Ceramics
Arezoo Zare, Mo-Rigen He, Michael Straker, M. V. S. Chandrashekhare, Michael Spencer, Kevin J. Hemker, James W. McCauley, K. T. Ramesh
Summary: The study investigated the out-of-plane anisotropy in the mechanical response of boron carbide single crystals, finding significant differences in indentation modulus and hardness among different crystal orientations. It also examined the influence of in-plane anisotropy on indentations, and observed deformation behavior through pop-in events. The research provided insights into the failure mechanism of boron carbide, highlighting the potential role of crystal slip in quasi-plasticity and formation of amorphous bands leading to cracking and fragmentation.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
X. Chen, B. E. Schuster, L. J. Kecskes, Q. Wei
Summary: The study presents a fabrication process for creating thicker sub-scale projectiles with multilayer structures. Experimental and ballistic testing results demonstrate that the layered composites have good ballistic performance and maintain their integrity.
JOURNAL OF DYNAMIC BEHAVIOR OF MATERIALS
(2022)
Correction
Materials Science, Ceramics
Arezoo Zare, Mo-Rigen He, Michael Straker, M. V. S. Chandrashekhare, Michael Spencer, Kevin J. Hemker, James W. McCauley, K. T. Ramesh
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Todd C. Hufnagel, Jeffrey T. Lloyd, Timothy P. Weihs, Laszlo J. Kecskes, Tomoko Sano
Summary: Designing metallic materials for resistance to ballistic penetration is challenging due to the multiple possible mechanisms of deformation and failure under dynamic loading, which are sensitive to details of structure on scales ranging from atomic to macroscopic. Using magnesium alloys as an example, this overview illustrates some key scientific and technical challenges in this area.
MECHANICS OF MATERIALS
(2022)
Article
Engineering, Manufacturing
Jason C. Parker, Yik Tung Tracy Ling, K. T. Ramesh
Summary: The effects of composite microstructure on the dynamic response of UHMWPE fiber-reinforced composites when loaded in out-of-plane compression were studied. It was found that at high strain rates, the microstructure with lower porosity displayed a higher strength.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Materials Science, Composites
D. Kempesis, L. Iannucci, K. T. Ramesh, S. Del Rosso, P. T. Curtis, D. Pope, P. W. Duke
Summary: This research develops RVE-based finite element models to investigate the influence of microstructure on the overall mechanical behavior of UHMWPE composites. The models consider the randomness of fiber packing sequence and variations in fiber cross-sectional shape, and analyze the effects of interface properties uncertainties on the mechanical response. By calibrating the constituent properties and validating the models with experimental results, the shear and compression responses of UHMWPE laminates are studied.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Kshitiz Upadhyay, Dimitris G. Giovanis, Ahmed Alshareef, Andrew K. Knutsen, Curtis L. Johnson, Aaron Carass, Philip Bayly, Michael D. Shields, K. T. Ramesh
Summary: Computational models of the human head play a crucial role in predicting traumatic brain injury, but they are associated with uncertainty and variability. This study proposes a data-driven framework for uncertainty quantification of computational head models, which reduces computational cost while providing accurate approximations. The framework employs manifold learning techniques and surrogate models to quantify uncertainty and variability in the simulated strain fields. The results highlight significant spatial variation in model uncertainty and reveal differences in uncertainty among strain-based brain injury predictor variables.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Xiangyu Sun, Dung-Yi Wu, Minju Kang, K. T. Ramesh, Laszlo J. Kecskes
Summary: This study examined the competition between precipitation and grain-size refinement during equal channel angular extrusion (ECAE), and validated the utility of ECAE in high-strength Mg alloy engineering.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Dung-Yi Wu, Chengyun Miao, Christopher S. DiMarco, K. T. Ramesh, Todd C. Hufnagel
Summary: Designing aluminum alloys for spall resistance involves understanding the active failure mechanisms under dynamic loading. This study uses a high-throughput laser-driven micro-flyer plate impact technique to investigate the spall failure of aluminum alloy Al7085-T711 and its microstructure. The results show that the spall strength of Al7085-T711 increases with increasing strain rate and peak shock stress. Incipient spall voids primarily initiate at Al7Cu2Fe second-phase particles. Eliminating these particles significantly improves the spall strength, suggesting the potential for improved spall resistance in commercial alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Sh. Akhondzadeh, Minju Kang, Ryan B. Sills, K. T. Ramesh, Wei Cai
Summary: A long-standing challenge in computational materials science is to establish a quantitative connection between macroscopic properties of plastic deformation and microscopic mechanisms of dislocations in crystalline materials. This study provides direct comparisons between stress-strain curves obtained from miniaturized bar experiments and those from discrete dislocation dynamics (DDD) simulations. The DDD simulations show good agreement with experimental results, but the required dislocation mobility values are significantly lower than expected. Cross-slip of screw dislocations is also found to be necessary to capture the experimental stress-strain behavior.
Article
Engineering, Mechanical
Yunho Kim, Minju Kang, Gary Simpson, Matthew Shaeffer, Justin Moreno, Daniel Magagnosc, L. J. Kecskes, J. T. Lloyd, K. T. Ramesh
Summary: This study investigates the behavior of magnesium alloys under high-speed impact through experiments and simulations. The experiments reveal the formation of a non-isotropic debris cloud after impact and rupture, which is influenced by the projectile material and impact velocity. The simulations show good agreement with the experimental results, indicating that the anisotropic strength response of magnesium plays a significant role in the formation of the debris cloud.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Gary Simpson, Justin Moreno, Matthew Shaeffer, K. T. Ramesh
Summary: Hypervelocity impacts pose a significant threat in low-earth orbit and hypersonic flight applications. This study investigates the structure and characteristics of the impact flash generated by 3 km/s spherical projectile impacts on structural metals through experiments, demonstrating the coupling between early-stage mechanisms and later-stage ejection mechanisms.
Article
Multidisciplinary Sciences
Kshitiz Upadhyay, Ahmed Alshareef, Andrew K. Knutsen, Curtis L. Johnson, Aaron Carass, Philip V. Bayly, Dzung L. Pham, Jerry L. Prince, K. T. Ramesh
Summary: Computational head models are promising tools for understanding and predicting traumatic brain injuries. However, current head models suffer from uncertainty and poor accuracy in capturing the nonlinear brain tissue response. To address these issues, a framework for developing subject-specific head models using magnetic resonance imaging and elastography is proposed. The models employ a nonlinear visco-hyperelastic constitutive model to capture the brain tissue response.
JOURNAL OF THE ROYAL SOCIETY INTERFACE
(2022)
Meeting Abstract
Critical Care Medicine
Ahmed Alshareef, Phillip V. Bayly, Andrew K. Knutsen, Kshitiz Upadhyay, Ruth J. Okamoto, Aaron Carass, John A. Butman, Dzung L. Pham, Jerry L. Prince, K. T. Ramesh, Curtis L. Johnson
JOURNAL OF NEUROTRAUMA
(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)