Article
Chemistry, Physical
Alice Siegel, Sebastien Laporte, Fabien Sauter-Starace
Summary: The study conducted tensile tests on grade 2 titanium to analyze the influences of strain rate and sandblasting, identifying parameters for the Johnson-Cook model to simulate the material's elastoplastic behavior in FEM software. The results highlighted the negligible effect of strain rate on stress at the tested levels, and the hardening effect of sandblasting on the material.
Article
Chemistry, Physical
Lenka Kuncicka, Miroslav Jopek, Radim Kocich, Karel Dvorak
Summary: This study focused on developing a material model for low-carbon steel using the Johnson-Cook constitutive equation to characterize its behavior. Through Taylor anvil test and numerical simulation, a satisfactory correlation was found between experimental and predicted data. The deformed specimen region showed increased dislocations and hardness, consistent with predicted distributions of effective imposed strain and compressive stress.
Article
Chemistry, Physical
Xiaojing Zhang, Wenjin Yao, Xintao Zhu, Zhiming Hu, Wei Zhu, Hongxin Huang, Wenbin Li
Summary: In this study, mechanical testing, penetration testing, and numerical simulations were used to compare 15-5 PH steel formed by selective laser melting (SLM) and forging. The Johnson-Cook model parameters and failure parameters for both processes were obtained. The SLM process was found to refine the grain size and improve the mechanical properties of the steel, with a 13.1% increase in yield strength compared to forged specimens. The numerical model parameters were verified through penetration tests, which demonstrated an error of less than 10%. Additionally, the SLM-formed projectiles exhibited slightly superior penetration ability and abrasion resistance compared to forged projectiles.
Article
Construction & Building Technology
Xinyue Liu, Huihuan Ma, Feng Fan
Summary: The study determined the parameters of the Johnson-Cook model for SWRH82B steel to describe its dynamic mechanical properties and fracture behaviors. Different shapes and diameters of high-strength steel wires were tested, and an improved Johnson-Cook model considering strain hardening was proposed.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Md Shahanur Hasan, Dennis De Pellegrin, Richard Clegg, Cheng Yan
Summary: The behavior of high-manganese steel under large strains and different strain rates, especially in dynamic loading conditions, is investigated. The Johnson and Cook (JC) model is applied to determine the flow stress and material strength at high strain rates. Experimental and simulation results show that 11% Mn-steel exhibits higher toughness and strain hardening compared to 14% Mn-steel.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zhihua Liu, Hao Zhao, Jianpeng Li, Zhitao Niu, Vincent Ji
Summary: In this study, a suitable constitutive model was selected and its parameters were determined through experiments to investigate the relationship between flow stress and strain during the ultrasonic surface burnishing process (USBP). The quasi-static and dynamic mechanical responses of 18CrNiMo7-6 alloy steel were obtained and a modified Johnson-Cook constitutive model was established based on test data. The modified model exhibited improved accuracy and suitability for predicting the stress flow behavior of the alloy steel during USBP.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Hemant Kumar, R. Manna, Debashis Khan
Summary: Accurate and consistent constitutive model is required for Fe-30Mn-9Al-0.8C low-density steel. The Johnson-Cook (J-C) model parameters were evaluated and optimized using genetic algorithm (GA) technique. The developed constitutive model showed a precise estimation of flow stress with good correlation to experimental data under various strain rates and temperature conditions.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
P. A. Ramos, R. S. Coelho, H. C. Pinto, F. Soldera, F. Muecklich, P. P. Brito
Summary: The study examined the microstructural features and cyclic oxidation behavior of modified HH stainless steels with different Nb additions. Despite the presence of more niobium carbides in the 0.77%Nb steel, no significant changes were observed in the long-term oxidation behavior compared to the 0.09%Nb steel.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Ioannis Gkolfinopoulos, Nobuhiro Chijiwa
Summary: This research investigates the feasibility of using the Johnson-Cook model to evaluate the damage and remaining capacity of high-strength steel materials through experimental and numerical simulation methods. The results show that the model can accurately replicate deformation and stress concentration phenomena under different strain rates and triaxiality conditions, which can be used for fracture analysis of prestressed concrete members.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Multidisciplinary
Ang Xie, Shenghu Chen, Yang Wu, Haichang Jiang, Lijian Rong
Summary: A Nb-stabilized cast austenitic stainless steel was subjected to homogenization treatments at different temperatures to investigate the influence of microstructure on deformation behavior and mechanical properties. Dissolution of primary NbC at temperatures above 1150 C led to the disruption of network connectivity and an increase in carbon and niobium content in the matrix, resulting in improved ultimate tensile strength and elongation.
MATERIALS CHARACTERIZATION
(2022)
Article
Metallurgy & Metallurgical Engineering
Iman Harasani, Roohollah Jamaati, Hamed Jamshidi Aval
Summary: In this research, a commercially pure titanium-304 stainless steel bimetal was fabricated using the friction stir cladding process. The bimetal was characterized in terms of microstructure, mechanical properties, and corrosion resistance. The results showed that decreasing the tool's rotational speed resulted in a decrease in the thickness of the titanium layer at the bimetal interface. Furthermore, reducing the rotational speed also led to a decrease in the size of ultra-fine grains formed on the upper side of the SS304. The bimetal interface exhibited an (alpha + beta)-Ti structure influenced by heat and plastic deformation. The corrosion resistance improved with an increase in rotational speed, characterized by a change in corrosion voltage towards positive values and a decrease in corrosion current.
WELDING IN THE WORLD
(2022)
Article
Materials Science, Multidisciplinary
Jianhua Sun, Guangshun Cui, Yilei Li, Chen Bao
Summary: The Johnson-Cook constitutive and failure model parameters of A508-III steel are determined and verified through static and dynamic tests. The dynamic fracture behavior of the steel under various loading rates and geometric configurations is simulated using the Johnson-Cook model. The effect of loading rate and specimen geometry on the dynamic fracture toughness is investigated.
INTERNATIONAL JOURNAL OF FRACTURE
(2023)
Article
Chemistry, Physical
Sadaqat Ali, Muhammad Irfan, Usama Muhammad Niazi, Ahmad Majdi Abdul Rani, Imran Shah, Stanislaw Legutko, Saifur Rahman, Mohammed Jalalah, Mabkhoot A. Alsaiari, Adam Glowacz, Fahad Salem AlKahtani
Summary: Powder metallurgy technique is widely used for producing different alloy compositions with desired properties. This research focuses on the addition of titanium and niobium in a stainless steel matrix for potential biomedical applications. The increase in sintering dwell time led to simultaneous sintering and surface nitriding of compositions, resulting in improved corrosion resistance and non-cytotoxicity of the developed alloy compositions.
Article
Engineering, Multidisciplinary
Peng Chen, Guojun Zhang, Ting Lv, Xiaoqi Liang, Xi Yang, Songxiang Ji, Weirong Ren, Yanan Geng, Shan Zhu, Renxin Wang, Wendong Zhang
Summary: A new encapsulation structure with stainless steel mesh cap was proposed to address the lowfrequency sensitivity and narrow working bandwidth issues of the polyurethane-encapsulated lateral line-inspired MEMS vector hydrophone. The experimental results showed a significant improvement in sensitivity and working bandwidth with the stainless steel mesh encapsulation compared to the polyurethane encapsulation.
Article
Biophysics
Alex M. Downs, Adam Bolotsky, Bryan M. Weaver, Haley Bennett, Nathan Wolff, Ronen Polsky, Philip R. Miller
Summary: Microneedle sensors offer the potential for real-time, minimally invasive monitoring of molecular levels, allowing for personalized treatments and improved patient care. In this study, we demonstrate a COTS approach using an electrochemical aptamer-based sensor to detect the antibiotic vancomycin. By combining microelectrodes and stainless steel microneedles, our sensors achieve accurate measurements in undiluted blood and maintain their functionality within porcine skin. This approach, which does not require cleanroom fabrication or specialized equipment, has the potential to be expanded for multiplexed detection and real-time monitoring of various biomarkers.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Engineering, Civil
Rosalba Ferrari, Giuseppe Cocchetti, Egidio Rizzi
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2018)
Article
Computer Science, Interdisciplinary Applications
Rosalba Ferrari, Giuseppe Cocchetti, Egidio Rizzi
COMPUTERS & STRUCTURES
(2018)
Article
Mechanics
C. Rodrigues, F. M. F. Simoes, A. Pinto da Costa, D. Froio, E. Rizzi
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2018)
Article
Mechanics
Diego Froio, Egidio Rizzi, Fernando M. F. Simoes, Antonio Pinto Da Costa
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2018)
Article
Engineering, Mechanical
Fabio Pioldi, Egidio Rizzi
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2018)
Article
Engineering, Geological
Jonathan Salvi, Fabio Pioldi, Egidio Rizzi
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2018)
Article
Engineering, Civil
Rosalba Ferrari, Diego Froio, Egidio Rizzi, Carmelo Gentile, Eleni N. Chatzi
ENGINEERING STRUCTURES
(2019)
Article
Architecture
Rosalba Ferrari, Giuseppe Cocchetti, Egidio Rizzi
INTERNATIONAL JOURNAL OF ARCHITECTURAL HERITAGE
(2020)
Article
Engineering, Multidisciplinary
Rosalba Ferrari, Giuseppe Cocchetti, Egidio Rizzi
INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS
(2020)
Article
Mechanics
Diego Froio, Egidio Rizzi, Fernando M. F. Simoes, Antonio Pinto da Costa
Review
Computer Science, Interdisciplinary Applications
Diego Froio, Luca Verzeroli, Rosalba Ferrari, Egidio Rizzi
Summary: This study introduces an original numerical modeling approach for moving load beam problems using object-oriented C++ parallel computing FEM implementation. It provides efficient numerical analyses for the complete dynamic response of beams under high-velocity moving loads and reviews main issues related to moving loads, FEM modeling, and parallel computing. The study explores example cases of moving loads on finite beams and historic railway bridges, obtaining interesting engineering outcomes.
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2021)
Article
Operations Research & Management Science
Giuseppe Cocchetti, Egidio Rizzi
JOURNAL OF OPTIMIZATION THEORY AND APPLICATIONS
(2020)
Article
Mechanics
Giuseppe Cocchetti, Egidio Rizzi
Summary: This analytical note contributes to the understanding of general principles in the Mechanics of (symmetric circular) masonry arches, with a focus on the least-thickness condition under self-weight and the five-hinge collapse mode. It presents new and complementary information on peculiar extremal conditions, such as maximum intrinsic non-dimensional horizontal thrust and wide angular inner-hinge position, occurring in specific instances of over-complete arches.
ARCHIVE OF APPLIED MECHANICS
(2021)
Article
Engineering, Civil
Gabriele Ravizza, Rosalba Ferrari, Egidio Rizzi, Vasilis Dertimanis
Summary: The increasing adoption of low-cost sensors in structural health monitoring has highlighted the need for effective denoising strategies at the post-processing stage. Discrete wavelet transform and singular value decomposition have been shown to be effective in purifying noise-corrupted signals in various research fields. The study provides a systematic performance evaluation of these denoising techniques in civil engineering applications, demonstrating effectiveness in purifying seismic response signals but with some limitations when dealing with ambient vibration signals.
JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
(2021)
Article
Construction & Building Technology
Aram Cornaggia, Rosalba Ferrari, Maurizio Zola, Egidio Rizzi, Carmelo Gentile
Summary: This paper presents a case study on the structural assessment of a historical infrastructure. The study focuses on the analysis and interpretation of response data to develop a reliable and effective Structural Health Monitoring (SHM) platform.
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)