Article
Engineering, Manufacturing
Ankit Kumar Pandey, Prashant P. Date
Summary: This paper analyzes the material behavior of stainless steel-304 foil with different tests and examines the effects of strain rate and temperature on flow stress behavior, surface roughness, microstructural evolution, and fracture mechanism. The study finds that the percentage elongation and tensile strength during high-temperature tests are dependent on strain rate and decrease with a decrease in strain rate. Recrystallization and grain growth occur during high-temperature deformation, leading to changes in surface roughness and fracture mechanism. The analysis can guide the design of micro-sheet metal forming processes.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Article
Engineering, Geological
Tianshou Ma, Haonan Wang, Yang Liu, Yufan Shi, P. G. Ranjith
Summary: This study proposed a universal model for fracture-initiation pressure (FIP) in inclined wells, taking into account the combined effects of anisotropic elasticity and tensile strength of formation rock. The model was verified by indoor experiments and compared with traditional models. The results showed that the proposed model is more consistent with experimental results and provides a better understanding of the influencing factors of FIP.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Shaoqiang Yang, Dong Yang, Zhiqin Kang
Summary: This study investigates the mechanical properties and morphology changes of oil shale at different temperatures through tensile experiments. It reveals that temperature has a significant effect on tensile strength and fracture types of oil shale. Results show a decrease in tensile strength below 400 degrees C, with a multiple fracture type observed in this temperature range. Above 400 degrees C, a shift in tensile strength values and fracture types is observed.
NATURAL RESOURCES RESEARCH
(2021)
Article
Engineering, Geological
A. M. H. Pluymakers, R. R. Bakker, F. B. Ter Steege, B. Versluis, A. Barnhoorn
Summary: Many rocks contain planar heterogeneities, such as fractures and veins, but little is known about their impact on strength and fracture pattern formation. This study investigates the mechanics of stylolite-bearing and pre-fractured limestone using Brazilian Disc tests. The results show that samples with stylolites are significantly weaker than intact samples, regardless of loading direction. Fracturing a stylolite-rich interval can lead to increased permeability.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Engineering, Geological
Jinhyun Choo, Shabnam J. Semnani, Joshua A. White
Summary: The study investigates the anisotropic viscoplastic behavior of shale and develops a two-scale constitutive model to capture this behavior. The model is validated with laboratory creep data and simulations of time-dependent borehole closure in shale formations.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2021)
Article
Chemistry, Analytical
Teddy Tite, Cosmin Ungureanu, Mihaela Buga, Ionel Stavarache, Elena Matei, Constantin Catalin Negrila, Lucian Trupina, Adnana Spinu-Zaulet, Aurelian Catalin Galca
Summary: This research presents a synthesis method for a thin-film cathode that can enhance the electrochemical performance of batteries. V2O3 thin films were successfully synthesized on graphene/aluminum foil and tested as cathodes. The experimental results demonstrate that the V2O3 thin films exhibit superior electrochemical properties, especially with the addition of tin (5 mol%) which improves the initial capacity and cycling performance of the batteries.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Xiaojie Jin, Pizhi Zhao, Wei Chen, Ke Ma, Yu Fu, Shijie Guo, Dan Feng
Summary: The effect of grain size on the mechanical properties and formability of AA8021 aluminum foils was investigated. It was found that increasing grain size led to a significant decrease in strength and formability. This was attributed to the increase in the proportion of free surface grain and the decrease in the number of grain boundaries, resulting in a decrease in strength. Additionally, larger grain sizes led to higher surface roughness and more non-uniform strain distribution, promoting premature fractures.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Engineering, Civil
Jinhe Chen, Minger Wu
Summary: The ETFE foil is an important cladding material in architecture, and its uniaxial tensile properties have been extensively studied. However, there is limited research on the uniaxial tensile properties perpendicular to the uniaxial pre-stretching direction and along the biaxial pre-stretching direction.
THIN-WALLED STRUCTURES
(2023)
Article
Chemistry, Analytical
Yu-Song Zhang, Yao Liu, Yun-Zhi Tang, Zhen Sun, Yu-Hui Tan, Xiao-Wei Fan, Hui-Juan Shi, Peng-kang Du
Summary: In this experiment, CuCu/CNTs-Cu composite copper foil with a micro-nano organizational structure and excellent mechanical properties was prepared by co-deposition of CNTs and Cu2+.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Mechanics
Tianshou Ma, Haonan Wang, Yang Liu, Chenliang Fu, P. G. Ranjith
Summary: In this study, the mechanical properties of layered shale were investigated using the notched semi-circular bend and Brazilian disc tests combined with acoustic emission and digital image correlation technology. The extended critical plane approach criterion was validated and found to be universally applicable for predicting the fracture toughness and tensile strength of different shales. The results have practical implications for the design and construction of hydraulic fracturing and rock engineering.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Materials Science, Ceramics
A. Abaza, J. Laurencin, A. Nakajo, M. Hubert, T. David, F. Monaco, C. Lenser, S. Meille
Summary: Micro-compression tests were conducted on plasma focused ion beam milled pillars in porous YSZ pellets. The results showed that the mechanical properties were reproducible due to the homogeneity of the microstructures. The compressive fracture strength was found to decrease with increasing porosity, and a transition from brittle behavior to diffuse damage was observed.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
A. Amiri-Rad, M. Hutter, L. E. Govaert, J. A. W. van Dommelen
Summary: The study shows that the anisotropy of the rate-dependent yield stress in an elasto-viscoplastic constitutive model deviates from the Hill parameters when applied to systems with higher levels of anisotropy. This discrepancy is mathematically investigated to be related to the viscoplastic multiplier of the associated flow rule, and a solution is proposed to restore consistency in high anisotropy systems.
MECHANICS OF MATERIALS
(2021)
Article
Physics, Applied
M. Vronka, L. Straka, M. Klementova, O. Heczko
Summary: The study used Lorentz transmission electron microscopy to investigate the magnetic domain structure at the martensite transformation interface in a Ni50Mn25Ga20Fe5 alloy. By reducing the thickness of the foil, the stability of the magnetic domain structure was achieved, with dense labyrinth structures in thicker regions and broader domains in thinner regions. The interface consists of a nanosized laminated structure of austenite and martensite, where the two distinct magnetic domain structures interpenetrate and transition within the interface region.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Danbi Song, Ryoonhan Kim, Kwangdeok Choi, Dongsig Shin, Sujin Lee
Summary: In this study, a fiber laser with a wavelength of 1070 nm was used to weld thin 316 L stainless steel foils using different beam shapes. The effects of beam shape and welding speed on the weld geometry, microstructure, lap shear strength, and crystallographic grain structure were analyzed. The results showed that the laser beam shape significantly influenced the weld characteristics, and the spot-wobble beam at a welding speed of 500 mm/s achieved the best results. This study demonstrated the superiority of the spot-wobble beam over the doughnut beam in high-power laser welding of thin-foil stainless steel plates.
Article
Materials Science, Multidisciplinary
D. Frazer, F. Teng, D. Murray, A. Pomo, A. Winston, J. Cole, J. F. Jue, J. Giglio
Summary: Considerable efforts are being made to develop and regulate low enriched fuels for research and test reactors worldwide. The United States is exploring plate-type fuels for higher power research and test reactors, which consist of metallic uranium-molybdenum foils with aluminum alloy cladding. Mechanical testing of the bond line in the aluminum alloy cladding was conducted to evaluate its strength and deformation behavior. The results showed that the microstructural features of the bond line did not affect the mechanical properties of the specimens.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Engineering, Mechanical
Colin Bonatti, Dirk Mohr
INTERNATIONAL JOURNAL OF PLASTICITY
(2017)
Article
Chemistry, Multidisciplinary
Thomas Tancogne-Dejean, Marianna Diamantopoulou, Maysam B. Gorji, Colin Bonatti, Dirk Mohr
ADVANCED MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Colin Bonatti, Dirk Mohr
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2019)
Article
Materials Science, Multidisciplinary
Colin Bonatti, Dirk Mohr
Article
Engineering, Mechanical
Colin Bonatti, Dirk Mohr
Summary: The Forming Limit Curve (FLC) is influenced by various factors including yield locus, hardening behavior, strain rate, etc. A neural network model has been demonstrated as an efficient method to describe the effect of non-proportional loading and predict the FLC for a given proportional pre-straining history.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Multidisciplinary Sciences
Colin Bonatti, Dirk Mohr
Summary: A recurrent neural network framework with Minimal State Cells is developed for material modeling, successfully applied to datasets of four distinct classes of materials, accurately reproducing stress-strain responses for any loading path. The final result is a universal, flexible model that can capture the mechanical behavior of any engineering material while providing an interpretable representation of their state.
Article
Engineering, Mechanical
Colin Bonatti, Bekim Berisha, Dirk Mohr
Summary: In this study, RNN models were used to investigate the mechanical behavior of aluminum alloys and reasonable approximations were obtained. A methodology to reduce numerical instabilities in the finite element implementation was also proposed.
INTERNATIONAL JOURNAL OF PLASTICITY
(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)