Article
Engineering, Marine
Burak Can Cerik, Joonmo Choung
Summary: In this paper, a recently proposed rate-dependent shell element fracture model was validated using quasi-static and dynamic impact tests on square hollow sections made from offshore high-tensile strength steel. The study successfully predicted the membrane loading-dominated failure and bend loading failure using rate-dependent forming limit curves and ductile fracture loci, respectively. The adopted material and fracture model accurately predicted the peak force, fracture initiation, and fracture mode. The importance of considering dynamic effects and separate treatment of failure modes was further discussed. The shortcomings of the common practice of treatment of rate-effects in low-velocity impact simulations involving fracture were highlighted.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
David Hernandez-Escobar, Alejandra Slagter, Julie Gheysen, Andreas Mortensen
Summary: This study documents the local separation of the iron matrix and a fraction of silica inclusions in samples of pure iron with melt-induced silica inclusions at room temperature, due to the presence of a void. Various experimental techniques were used to demonstrate that these voids originated from interfacial debonding between silica inclusions and the iron matrix during cooldown from elevated processing temperatures, which is caused by volumetric expansion associated with the austenite-to-ferrite phase transformation.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Engineering, Marine
Burak Can Cerik, Kangsu Lee, Joonmo Choung
Summary: This study compared experimental test results on punch-loaded unstiffened and stiffened panels with numerical predictions using different localized necking modeling approaches with shell elements. The extended version of the Bressan-Williams-Hill (BWH) criterion, including bending effects and forming-severity concept, yielded improved estimations of fracture initiation with shell elements, while mesh size sensitivity depended on the punch geometry.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Review
Engineering, Mechanical
Vivek K. Barnwal, Shin-Yeong Lee, Jisik Choi, Jin-Hwan Kim, Frederic Barlat
Summary: The numerical description of ductile fracture for advanced high strength steel sheets remains a challenge in sheet metal research, with no consensus on a suitable fracture criterion. A study evaluating six fracture criteria on TRIP1180 sheet under different loading conditions found that traditional uncoupled fracture criteria can reasonably describe the fracture. The study also showed that a high number of fracture coefficients does not guarantee improved fracture prediction under various loading conditions.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Construction & Building Technology
Wenchao Li, Yuan Jing
Summary: A new fracture model is developed to predict the ductile fracture of structural steel under multiaxial stress states. The model has only two material parameters, which can be easily calibrated through a simple standard coupon test. The effectiveness of the proposed fracture model is verified through experimental tests and numerical analysis.
Article
Materials Science, Multidisciplinary
T. T. T. Trang, Yoon-Uk Heo
Summary: In this study, the reduction of austenite stability in medium Mn steels leads to a change in fracture mode from ductile to brittle. The TRIP effect and the formation of α' on pre-existing α' are found to contribute to this behavior. Additionally, increased γ stability by carbon partitioning affects the formation of α' lamellae during deformation.
MATERIALS CHARACTERIZATION
(2021)
Article
Mechanics
Aiguo Chen, Peiyun Zhang, Bolin Chen, Yong Li, Jihui Xing
Summary: Tensile fracture static tests were conducted on nine specimens of Chinese Q460C high-strength structural steel to study its ductile fracture behavior. A new model considering stress triaxiality and Lode angle was proposed to predict the ductile fracture of Q460C HSS. The model incorporated a stress softening criterion for better fracture propagation simulation. The simulation results showed good agreement with the experimental results.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Materials Science, Multidisciplinary
Xinzhu Zheng, Bekassyl Battalgazy, Abhilash Molkeri, Stylianos Tsopanidis, Shmuel Osovski, Ankit Srivastava
Summary: Recent advancements in machine learning have allowed for the use of image analysis in solving materials science and engineering problems. This study used a machine learning-based workflow to classify the fracture surfaces of dual-phase steels under different stress states. The results showed that the accuracy of the machine learning technique depends on the length-scales of the fracture surface images, and the critical length-scale varies with the typological categories being classified. The study highlights the importance of length-scales in image analysis in materials science and engineering.
MECHANICS OF MATERIALS
(2023)
Article
Engineering, Civil
Christopher Smith, Andy Ziccarelli, Masao Terashima, Amit Kanvinde, Gregory Deierlein
Summary: The proposed Stress Weighted Ductile Fracture Model (SWDFM) accurately predicts the initiation of ductile fracture due to Ultra-Low Cycle Fatigue (ULCF) over a wide range of stress states and loading histories, representing the micro-mechanical mechanisms of ULCF well. It broadens the scope of ULCF models by considering a broader range of multi-axial stress and strain states encountered in steel structures.
ENGINEERING STRUCTURES
(2021)
Article
Chemistry, Physical
Peter Prislupcak, Tibor Kvackaj, Jana Bidulska, Pavol Zahumensky, Viera Homolova, Lubos Juhar, Pavol Zubko, Peter Zimovcak, Roman Gburik, Ivo Demjan
Summary: This study investigates the effect of different austenitization temperatures on the hot ductility of C-Mn-Al High-Strength Low-Alloy (HSLA) steel, with a focus on the importance of details in ductility, fracture surface characteristics, and microstructure of the steel. Metallographic analysis revealed that AlN and AlN-MnS precipitates at grain boundaries are the main causes of plasticity trough in the evaluated steel.
Article
Nanoscience & Nanotechnology
Ali Ameri, Hongxu Wang, Zongjun Li, Zakaria Quadir, Manny Gonzalez, Paul J. Hazell, Juan P. Escobedo-Diaz
Summary: Increasing peak compressive stress leads to an increase in spall strength, which also affects tensile stress. Microstructural examinations reveal that spall damage is mainly accommodated by ferrite grains.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Edouard de Sonis, Sylvain Depinoy, Pierre-Francois Giroux, Hicham Maskrot, Pierre Wident, Olivier Hercher, Flore Villaret, Anne-Francoise Gourgues-Lorenzon
Summary: The impact toughness and fracture toughness properties of 316L austenitic stainless steel manufactured by laser powder bed fusion were investigated. The effects of grain size, morphology, dislocation structures, and oxide nanoparticles on toughness behavior were analyzed. Ductile fracture resulted from decohesion at the matrix/oxide interfaces. Recrystallization decreased the toughness due to synergistic effects between recrystallization and oxide particle coarsening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Mechanics
Tamilselvan Nambirajan, P. C. Ashwin Kumar, Sahil Aggarwal, Abhishek Gurudutt
Summary: This study extracts 48 specimens from three structural steel grades used in the Indian construction industry and simulates the stress states of ductile fracture initiation. Through testing and numerical modeling, ductile fracture initiation parameters are extracted and a three-dimensional fracture locus is constructed. Additionally, a new ductile fracture model is proposed and compared with existing models, showing better prediction accuracy.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Mechanics
Sung-Ju Park
Summary: This paper presents an application method to predict fracture initiation for low cycle fatigue of 4-point bending in structural steel SS275. The swift isotropic hardening law was used in the numerical simulation to account for large strain deformation. The damage indicator framework with the Hosford-Coulomb (HC) model was adopted to characterize the damage accumulation and fracture behavior. Non-linear finite element analyses were performed to identify fracture model parameters based on the loading path of fracture initiation. The presented HC model was applied to an extremely low fatigue test (less than 100 cycles) and demonstrated good accuracy in predicting fracture initiation for complex loading scenarios.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Construction & Building Technology
Yun-Long Zhong, Guo-Qiang Li, Yan-Bo Wang, Yang Xiang
Summary: In this paper, the influence of design parameters on the hysteresis behavior of an assembled steel rod energy dissipater (ASRED) was investigated using numerical models. It was found that increasing the dissipation segment length and friction coefficient would reduce the fatigue life and increase the cyclic hardening rate of the energy dissipater. The length of the middle stopper had no effect on the cyclic behavior and fatigue life, while an excessive clearance size would cause pitching effects and tensile strength deterioration. Optimal design parameters were also proposed to improve the performance of the ASRED.
JOURNAL OF BUILDING ENGINEERING
(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)