Article
Materials Science, Multidisciplinary
Miaoran Liu, Afia Kouadri-Henni, Benoit Malard
Summary: The study employs a sequential-coupled thermo-mechanical model and direct cyclic technique to investigate laser welding and low-cycle fatigue residual stress. The effects of residual stress on fatigue properties and relaxation behavior are analyzed. The simulation results show that laser welding residual stress is highly dependent on constitutive models and how initial laser welding residual stress influences low-cycle fatigue residual stress. Furthermore, the simulation indicates that residual stress redistributes and relaxes in the weld and heat-affected zone after low-cycle fatigue. To validate the accuracy of the simulation, neutron diffraction experiment is carried out, and the experimental data are consistent with the simulation results.
Article
Engineering, Mechanical
Chenwei Shao, Xinqiang Zhang, Shuo Zhao, Yankun Zhu, Huajie Yang, Yanzhong Tian, Zhenjun Zhang, Peng Zhang, Xianghai An, Zhefeng Zhang
Summary: This study proposes a crack growth model for LCF to enhance the LCF performance of engineering structural materials. By introducing strength gradient architecture and investigating the influences of strength/microstructure, it is found that TWIP steel with negative strength gradient exhibits excellent LCF properties.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Chemistry, Physical
Haiyan He, Bing Wang, Dong Ma, Alexandru D. Stoica, Zhenduo Wu, Si Lan, Muhammad Naeem, Xun-Li Wang
Summary: In the low-cycle fatigue study of CrFeCoNiMo0.2 high entropy alloy, dislocation slip was identified as the main deformation mechanism, and a three-stage ratcheting behavior was observed. The increase in dislocation density due to ratcheting strain was found to stabilize the structure and improve fatigue resistance.
Article
Materials Science, Multidisciplinary
Md Abu Bakkar, Rajib Saha, Debdulal Das
Summary: The low cycle fatigue (LCF) behavior and associated failure mechanisms of a thermo-mechanically treated Fe 500D steel rebar were experimentally evaluated to assess its performance under seismic conditions. The results showed a significant reduction in yield strength under dynamic loading, leading to considerable cyclic softening of the rebar till failure in all strain amplitudes, indicating deterioration of seismic resistance property. Both strain-life and plastic strain energy-life relationships accurately predicted the cyclic plastic behavior of the selected rebar, with fatigue cracks always initiating at the transverse rib root and propagating primarily alongside the rim region.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Xiaochao Liu, Linsen Lei, Shizhu Xing, Tang Gu, Xiangwei Li, Shangchao Zhao, Xianjun Pei
Summary: This study presents a post-processing procedure for predicting the high- and low-cycle fatigue life of welded structures. The procedure calculates the equivalent structural strain range at the weld notch by enforcing the equilibrium condition and Navier's hypothesis. The return mapping algorithm is applied to account for through-thickness plastic deformation in the low-cycle fatigue regime. The proposed method accurately predicts the fatigue life of 793 welded joints made from steel, magnesium, titanium, and aluminum alloy.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Nanoscience & Nanotechnology
Masayoshi Kumagai, Koichi Akita, Masatoshi Kuroda, Stefanus Harjo
Summary: The study found that the dislocation density of austenitic stainless steel increased with the number of plastic deformation cycles, but began to decrease after a certain number of cycles. The changes in different types of dislocations during cyclic loading significantly affected the crystal structure and flow stress.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Mechanical
Mingjiang Xie, Shizhu Xing, Jianli Zhao, Ozler Karakas, Yongzhe Li, Xianjun Pei
Summary: This study reevaluates the low-cycle fatigue analysis approach of welded pipelines in the ASME B31 code to understand its underlying mechanism, limitations, and scope. By analyzing two sets of low-cycle fatigue data from piping structures using different strain information, a structural strain method is proposed to generalize the pseudo-stress idea implied in the ASME code.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Yan Peng, Yang Liu, Haoran Li, Jiankang Xing
Summary: This study discussed the effect of average strain on the low-cycle fatigue life of materials under different strain cycle ratios, based on the framework of damage mechanics and its irreversible thermodynamics. A new low-cycle fatigue life prediction method was proposed, which showed good agreement with test results and outperformed existing models in predicting low-cycle fatigue life.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Nanoscience & Nanotechnology
Mao-Yuan Luo, Tu-Ngoc Lam, Pei-Te Wang, Nien-Ti Tsou, Yao-Jen Chang, Rui Feng, Takuro Kawasaki, Stefanus Harjo, Peter K. Liaw, An-Chou Yeh, Soo Yeol Lee, Jayant Jain, E-Wen Huang
Summary: The effect of grain size on the strain-controlled low-cycle fatigue properties of CoCrFeMnNi high-entropy alloys was investigated. It was found that fine-grained alloys exhibited more prominent secondary cyclic hardening behavior compared to coarse-grained alloys. By tuning the grain size, fatigue-resistant high-entropy alloys can be designed.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Di Xie, Zongyang Lyu, Yuan Li, Peter K. Liaw, Huck Beng Chew, Yang Ren, Yan Chen, Ke An, Yanfei Gao
Summary: This study examines the microscopic deformation mechanisms of an extruded, precipitation-strengthened AZ80 magnesium alloy under strain-controlled low-cycle fatigue using in situ neutron diffraction measurements. The results show that plastic deformation is primarily controlled by alternating {10.2} extension twinning and detwinning mechanisms. The complex evolution of dominant deformation mechanisms in this alloy is influenced by initial texture, precipitation strengthening, and load sharing of different grain families and phases, with elevated dislocation activities believed to contribute to its relatively poor low-cycle fatigue lifetime compared to other magnesium alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Multidisciplinary Sciences
Wei-Tin Chen, Chin-Wei Wang, Ching-Chia Cheng, Yu-Chun Chuang, Arkadiy Simonov, Nicholas C. Bristowe, Mark S. Senn
Summary: The phase diagrams of LaMnO3 perovskites have been intensively studied due to colossal magnetoresistance exhibited around the 3th/8 doping level. Phase segregation between ferromagnetic metallic and antiferromagnetic insulating states prevents a complete understanding of the orbital ordered state at this doping level. Through crystallographic analysis, it was found that the superposition of two distinct lattice modes leads to a striping of Mn3+ and Mn3.5+ layers, ultimately causing cancellation of Jahn-Teller-like displacements at the critical doping level and melting of long range orbital order.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Mechanical
Zhongran Zhang, Zhenming Yue, Jiashuo Qi, Jun Gao, Yliang Qiu
Summary: In this study, a sheet fatigue shear test device is designed and applied to low-cycle fatigue testing of DP900 with varying strain amplitudes. Microstructure analysis and fracture surface examination reveal cyclic softening behavior, with total plastic strain energy absorbed increasing as loading amplitude decreases. The life prediction model based on plastic strain energy density and strain amplitude is suitable for cyclic shear paths, with microinhomogeneity influencing stress and strain distribution, particularly martensite deformation.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Engineering, Civil
Mayank Tripathi, Rajesh P. Dhakal
Summary: In this paper, a path-dependent cyclic stress-strain model for reinforcing bars that takes into account the effects of bar buckling, low-cycle fatigue damage and loading history is proposed. An extensive experimental campaign is conducted to investigate the hysteretic behavior of buckling-prone bars, and the results are used to develop and calibrate the cyclic stress-strain relationship. The proposed model accurately predicts the cyclic response of reinforcing bars, including the effects of buckling and low-cycle fatigue.
ENGINEERING STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
D. Xie, Z. H. Li, T. T. Sasaki, Y. F. Gao, Z. Y. Lyu, R. Feng, Y. Chen, K. An, H. B. Chew, T. Nakata, S. Kamado, K. Hono, P. K. Liaw
Summary: The low-alloyed Mg-Al-Ca-Mn alloy, as a new class of heat-treatable magnesium alloys, shows great engineering potential due to its excellent extrudability and high strength achieved by the dispersion of Guinier-Preston (G.P.) zones. In this study, in situ neutron diffraction measurements were conducted to investigate the cyclic deformation behavior of this alloy with and without G.P. zone dispersion. The relationship between macroscopic deformation behavior and microscopic response at the grain level, such as twinning and detwinning, was established.
Article
Engineering, Mechanical
Jagtar Singh, Greg Wheatley, Ricardo Branco, Fernando Ventura Antunes, Reza Masoudi Nejad, Filippo Berto
Summary: The present study investigates the influence of tensile pre-strain histories and strain ratio on the cyclic deformation behavior of 6061 aluminum alloy and 2024 aluminum alloy. The results indicate that the material exhibits cyclic strain-softening behavior, with the degree of softening increasing with higher strain ratios and lower strain amplitudes.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Biomedical
Chia-Chen Hsu, Julian H. George, Sharlayne Waller, Cyril Besnard, David A. Nagel, Eric J. Hill, Michael D. Coleman, Alexander M. Korsunsky, Zhanfeng Cui, Hua Ye
Summary: The study successfully supported 3D hiPSC-derived neural networks using granular hydrogel-based scaffolds, resulting in improved cell viability and longer neurite extensions. This method is simple, rapid, and efficient, achieving tissue-relevant granular structures in hydrogel cultures.
BIOACTIVE MATERIALS
(2022)
Article
Computer Science, Information Systems
Mehmet C. Kulan, Nick J. Baker, Konstantinos A. Liogas, Oliver Davis, John Taylor, Alexander M. Korsunsky
Summary: Finite element analysis is crucial in accurately predicting losses in magnetic materials and is important in designing electromagnetic devices. Soft magnetic composites, an alternative to silicon steel laminations, have unique microstructures that require different modeling approaches. This study evaluates the trends in modeling soft magnetic composite core losses and discusses the challenges in estimating and using Steinmetz core loss coefficients.
Article
Physics, Applied
K. Fogarty, E. Ametova, G. Burca, A. M. Korsunsky, S. Schmidt, P. J. Withers, W. R. B. Lionheart
Summary: Point by point strain scanning is commonly used to map residual stress in engineering materials, but its spatial resolution is limited. Alternatively, wavelength resolved neutron transmission imaging can retrieve tomographic information about residual strain induced within materials. In this study, we experimentally demonstrate the reliable measurement of the second moment of strain distribution.
APPLIED PHYSICS LETTERS
(2022)
Article
Polymer Science
Semen D. Ignatyev, Eugene S. Statnik, Dmitriy Yu. Ozherelkov, Dmitry D. Zherebtsov, Alexey I. Salimon, Dilyus I. Chukov, Victor V. Tcherdyntsev, Andrey A. Stepashkin, Alexander M. Korsunsky
Summary: This study evaluated the fracture toughness of low-temperature carbonized elastomer-based composites filled with shungite and short carbon fibers. The results showed that the increase in carbonization temperature resulted in a decrease in the critical stress intensity factor, while the addition of carbon fibers enhanced the toughness of the material.
Article
Materials Science, Multidisciplinary
Lifeng Ma, Alexander M. Korsunsky
Summary: This paper proposes a fundamental formulation for inhomogeneous inclusion problems based on the equivalent homogeneous inclusions, which significantly reduces the workload and enables analytical solutions. It allows for solving problems with arbitrarily connected and-shaped inhomogeneous inclusions and any kind of external load. This formulation is applicable for evaluating the effective properties of composite materials.
Article
Chemistry, Multidisciplinary
Yuliya Kan, Julia Bondareva, Eugene S. Statnik, Julijana Cvjetinovic, Svetlana Lipovskikh, Arkady S. Abdurashitov, Maria A. Kirsanova, Gleb B. Sukhorukhov, Stanislav A. Evlashin, Alexey Salimon, Alexander M. Korsunsky
Summary: This study focuses on the fabrication of core-shell nanofiber mats using electrospinning technique. The core-shell structure was modified with silica nanoparticles and graphene oxide to enhance fiber integrity and stability. The influence of nano additives and crosslinking conditions on fiber diameter, hydrolysis, and mechanical properties were investigated. The results suggest that electrospun core-shell nanofiber mats have great potential for biomedical applications.
Article
Materials Science, Multidisciplinary
Leon Romano Brandt, Kazunori Nishio, Enrico Salvati, Kevin P. Simon, Chrysanthi Papadaki, Taro Hitosugi, Alexander M. Korsunsky
Summary: The novel solid state, thin film Li-NMC batteries achieved high charge and discharge rates, reduced interface resistance, and improved capacity retention by optimizing cathode grain orientation and residual stress state.
APPLIED MATERIALS TODAY
(2022)
Article
Nanoscience & Nanotechnology
Zifan Wang, Jingwei Chen, Radim Kocich, Samuel Tardif, Igor P. Dolbnya, Lenka Kuncicka, Jean-Sebastien Micha, Konstantinos Liogas, Oxana Magdysyuk, Ivo Szurman, Alexander M. Korsunsky
Summary: An effective route of customizing the superelasticity (SE) of NiTi shape memory alloys via modifying the grain structure was explored. It was found that the smaller the grain size, the higher the phase transformation nucleation kinetics, and the lower the propagation kinetics. Stress concentration happens near high-angle grain boundaries, while no obvious stress concentration can be observed in low-angle grain boundary structures. The statistical distribution of strain becomes asymmetric during loading.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Engineering, Industrial
Hitoshi Soyama, Alexander M. Korsunsky
Summary: Mechanical surface modification techniques, such as shot peening, can improve the fatigue properties of metals and other materials. Cavitation peening is a special variation of shot peening that offers the advantage of lower surface roughness and no solid collisions. Understanding both fluid dynamics and materials science is necessary for grasping the mechanisms of cavitation peening. This comparative review presents key insights and achievements, comparing water jet, pulsed laser, and ultrasonic cavitation peening with traditional shot peening.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Cyril Besnard, Ali Marie, Petr Bucek, Sisini Sasidharan, Robert A. Harper, Shashidhara Marathe, Kaz Wanelik, Gabriel Landini, Richard M. Shelton, Alexander M. Korsunsky
Summary: This study investigates the nanoscale structural changes within dental carious lesions and establishes dental 3D nano-histology as an advanced platform for quantitatively evaluating caries-induced structural modification.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Patrick Aggrey, Igor A. Salimon, Alexey I. Salimon, Pavel Somov, Eugene Statnik, Dmitry Zherebtsov, Alexander M. Korsunsky
Summary: Effective light scattering, transmission, and absorption are crucial for optical devices. This study presents a facile and eco-friendly method for fabricating a textured Si/a-C film nanocomposite with high broadband absorption. The combination of surface texturing techniques and photo-friendly thin film coatings has shown significant progress in this field.
Article
Multidisciplinary Sciences
Yanan Hu, Shengchuan Wu, Yi Guo, Zhao Shen, Alexander M. Korsunsky, Yukuang Yu, Xu Zhang, Yanan Fu, Zhigang Che, Tiqiao Xiao, Sergio Lozano-Perez, Qingxi Yuan, Xiangli Zhong, Xiaoqin Zeng, Guozheng Kang, Philip J. Withers
Summary: In this study, the authors quantified the softening mechanisms in the fine equiaxed zone (FQZ) and proposed a hybrid welding strategy to mitigate the intergranular failure and increase weld strength in 7000 series aluminum alloys.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Vedat Durmaz, Katharina Koechl, Andreas Krassnigg, Lena Parigger, Michael Hetmann, Amit Singh, Daniel Nutz, Alexander Korsunsky, Ursula Kahler, Centina Koenig, Lee Chang, Marius Krebs, Riccardo Bassetto, Tea Pavkov-Keller, Verena Resch, Karl Gruber, Georg Steinkellner, Christian C. Gruber
Summary: This study used bioinformatics analysis to investigate the impact of SARS-CoV-2 variants on the affinity to the human receptor hACE2, with the latest Omicron variant showing the largest impact on the RBD binding interface compared to other variants. Omicron exhibited a higher ACE2 binding affinity than the wild type and requires special attention and monitoring.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
A. Salimon, E. S. Statnik, Yu Kan, O. O. Yanushevich, V. N. Tsarev, M. S. Podporin, S. D. Arutyunov, P. Yu Skripnichenko, M. S. Galstyan, A. M. Korsunsky
Summary: The decontamination of medical tools using sub- and supercritical fluids provides a sustainable alternative to disposable items. However, it is essential to assess the extent of material surface degradation, as CO2 can corrode metals and dissolve in polymers.
JOURNAL OF SUPERCRITICAL FLUIDS
(2022)
Article
Chemistry, Physical
Julijana Cvjetinovic, Anastasiia A. Merdalimova, Maria A. Kirsanova, Pavel A. Somov, Daniil Nozdriukhin, Alexey Salimon, Alexander M. Korsunsky, Dmitry A. Gorin
Summary: Siliceous diatom frustules are a promising platform for bio-assisted nanofabrication processes. By modifying diatomite with gold nanoparticles, composite structures with highly porous properties have been obtained, which can be used for various applications such as SERS.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
