Article
Engineering, Mechanical
Jundong Wang, Hao Lu, Zhixun Wen, Yeda Lian, Zhenwei Li, Zhufeng Yue
Summary: In this study, the fatigue mechanical properties of TC4 titanium alloy at different temperatures were investigated, and a method to predict the fatigue life of TC4 at different temperatures was established. The proposed model was verified to have reasonable accuracy with the test results.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Sushant Shivankar, Jie Chen, Yongming Liu
Summary: A novel fatigue-life prediction methodology combining a subcycle fatigue crack growth (FCG) analysis and equivalent initial flaw size (EIFS) concept is proposed. The model shows high accuracy in predicting fatigue life under various loading conditions, especially in the near-threshold regime and under multiaxial loadings.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Nanoscience & Nanotechnology
Abhijit Sadhu, Sagar Sarkar, Angshuman Chattopadhyay, Omkar Mypati, Surjya K. Pal, Ashish Kumar Nath
Summary: The study showed that LSP treatment can enhance yield strength and fatigue life of base and FSW specimens, but has less obvious effect on surface residual stress. Additionally, the increase in low angle grain boundaries after LSP indicates an increase in substructure induced by plastic deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Hitoshi Soyama, Michela Simoncini, Marcello Cabibbo
Summary: Cavitation peening can improve the fatigue life and strength of FSWed metallic sheet by introducing compressive residual stress, extending the fatigue life of non-peened FSW specimen significantly. This study demonstrates the first evidence of enhanced fatigue properties of FSWed metals through cavitation peening.
Article
Engineering, Mechanical
Chengchao Du, Qiuhong Pan, Shujin Chen, Shuang Tian
Summary: The fatigue performance of the stir zone of AA6061-T6 double-side friction stir welding joint with a thickness of 6 mm was improved by employing a rolling process to increase dislocation density. Crack initiation in the stir zone was crucial for fatigue performance, relying on the debonding of the lamellar structure, which in turn depended on the cracking of the fine grain layer in the lamellar structure.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2021)
Article
Engineering, Mechanical
Fei Li, Zhixun Wen, Ziyan Wu, Shuangbo Liu, Zhenwei Li, Haiqing Pei, Zhufeng Yue
Summary: The study introduces a novel assessment method (M-K-T) for safe fracture fatigue life prediction based on the equivalent initial flaw size (EIFS) concept and validates the accuracy of the method through experimental testing.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
T. Vuherer, M. Milcic, S. Glodez, D. Milcic, L. Radovic, J. Kramberger
Summary: This study focuses on the fatigue and fracture behavior of Friction Stir Welded AA2024-T351 joints at different welding speeds. Experimental results show that a welding speed of 116 mm/min exhibits the highest resistance against crack extension.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Materials Science, Multidisciplinary
Binghan Huang, Lei Wang, Xiaopeng Liu, Li Hui, Jiahui Cong, Song Zhou
Summary: The friction stir weld joints of 2024-T4 can be strengthened by ultrasonic impact treatment (UIT), resulting in refined grains and residual compressive stress on the surface. This treatment reduces the corrosion rate and extends the lifespan of the samples, exhibiting uniform corrosion.
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Dominik Walz, Robin Goebel, Martin Werz, Stefan Weihe
Summary: Friction stir welding is a promising joining process for lightweight construction, but the heavy equipment limits its application. To overcome this issue, a friction stir welding gun has been developed to produce short stitch welds as an alternative to spot welds. The study investigates the influence of stitch seam length on the strength properties of intersecting friction stir welds.
Article
Chemistry, Physical
Pisit Kaewkham, Wasawat Nakkiew, Adirek Baisukhan
Summary: The main purpose of this research was to enhance the mechanical properties of friction stir welds (FSW) in dissimilar aluminum alloys. Through controlling welding process parameters and conducting heat treatment and deep rolling compression, the tensile strength and fatigue life of the welded workpieces were improved.
Article
Engineering, Mechanical
Reza Masoudi Nejad, Nima Sina, Danial Ghahremani Moghadam, Ricardo Branco, Wojciech Macek, Filippo Berto
Summary: This paper investigates the fracture behavior and fatigue crack growth rate of the 2024-T351 aluminum alloy. Through experimental study and artificial neural network prediction, the best welding parameters and neuron numbers are determined, and the results of different methods are compared. The findings are of great significance for improving the quality of aluminum alloy welding.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
B. Sadeghi, P. Cavaliere, A. Laska, A. Perrone, G. Blasi, A. Gopinathan, M. Shamanian, F. Ashrafizadeh
Summary: Understanding the cyclic behaviour of Alumina reinforced Aluminium composites (Al-A2O3) is crucial for their application in various industries. This study focuses on the cyclic behaviour of Al-Alumina nanocomposites produced through spark plasma sintering (SPS) and friction stir welding (FSW). The microstructure of the samples is characterized using optical microscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy, and their mechanical properties are studied. The results show that the mechanical and fatigue properties of the nanocomposites depend on the material properties and the conditions of friction stir welding.
MATERIALS CHARACTERIZATION
(2023)
Review
Materials Science, Multidisciplinary
Xiushuo Zhang, Yu'e Ma, Wenya Li, Wei Huang, Weihong Zhang, ZhenHai Wang
Summary: This review summarizes the experimental, theoretical, and numerical studies on the effects of residual stresses on the fatigue characteristics of friction stir welds (FSWs). It also presents the applications of residual stress modification techniques for improving fatigue performance in FSWs.
CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES
(2023)
Article
Engineering, Manufacturing
S. Hassanifard, H. Alipour, A. Ghiasvand, A. Varvani-Farahani
Summary: Inserting thin copper foils into aluminum 6061 butt joints during Friction Stir Welding (FSW) process significantly improves the tensile strength and fatigue life of the welded joints. A three-dimensional finite element (FE) analysis was used to simulate the maximum stress and strain values in the weld zones, showing different stress magnitudes in regions with different mechanical properties.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Engineering, Mechanical
Robert Kosturek, Janusz Torzewski, Zdenek Joska, Marcin Wachowski, Lucjan Sniezek
Summary: This study investigated the performance of friction stir welded butt joints of the AA2519-T62 alloy at various tool rotation speeds. The results showed that an increase in tool rotation speed led to larger stir zone size and higher microhardness. The weld with the lowest tool rotation speed of 200 rpm exhibited reduced microhardness and was more susceptible to plastic deformation. Increasing tool rotation speed resulted in higher yield and tensile strength of the welds, with tensile failures occurring at different locations. The fatigue strength coefficient of the joints produced with 400-600 rpm tool rotation speed showed the smallest reduction.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Biochemistry & Molecular Biology
E. Hendrick, P. Peixoto, A. Blomme, C. Polese, N. Matheus, J. Cimino, A. Frere, A. Mouithys-Mickalad, D. Serteyn, L. Bettendorff, B. Elmoualij, P. De Tullio, G. Eppe, F. Dequiedt, V. Castronovo, D. Mottet
Article
Materials Science, Multidisciplinary
R. M. Genga, L. A. Cornish, M. Woydt, A. Janse van Vuuren, C. Polese
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
J. P. Nobre, C. Polese, S. N. van Staden
EXPERIMENTAL MECHANICS
(2020)
Article
Materials Science, Multidisciplinary
R. M. Genga, P. Rokebrand, L. A. Cornish, P. Zeman, J. Brajer, M. Woydt, A. Janse van Vuuren, C. Polese
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
R. M. Genga, P. Zeman, J. Brajer, N. L. Ofem, P. Rokebrand, L. A. Cornish, N. Nelwalani, A. Janse van Vuuren, C. Polese
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
R. M. Genga, P. Rokebrand, L. A. Cornish, N. Nelwalani, G. Brandt, N. Kelling, M. Woydt, A. Janse van Vuuren, C. Polese
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2020)
Article
Engineering, Mechanical
D. C. van Aswegen, C. Polese
Summary: This paper focuses on the application of Laser Shock Peening (LSP) process to retard fatigue cracks in thin metallic airframe structural panels by creating compressive residual stress fields. Experimental results show that the best configuration, a 15 mm wide LSP region with a 15 mm offset from the crack tip, yielded a fatigue life of more than 6 times the baseline value.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Materials Science, Multidisciplinary
Lehlohonolo Francis Monaheng, Willie Bouwer du Preez, Claudia Polese
Summary: The study found that Ti6Al4V (ELI) specimens produced through L-PBF and annealed meet the toughness requirements in the aerospace industry. The impact testing results showed that the specimens machined and 3D printed had toughness values of 31 J and 28 J respectively.
Article
Materials Science, Coatings & Films
D. Glaser, C. Polese, A. M. Venter, D. Marais, J. R. Plaisier
Summary: Engineering of component surfaces using Laser Shock Peening (LSP) requires optimization of process parameters to enhance performance. This study explores the extension of mechanical shot peening evaluation method to LSP evaluation and proposes a quick assessment method for LSP parameters. The results show that the residual stress values and depths of LSP are primarily dependent on laser power intensity and spot coverage, while surface roughness and microhardness are mostly independent of the LSP parameters. Therefore, parameter selection should focus on the desired residual stress field.
SURFACE & COATINGS TECHNOLOGY
(2022)
Proceedings Paper
Engineering, Manufacturing
R. M. Genga, D. Glaser, P. Rokebrand, L. A. Cornish, M. Woydt, T. Gradt, A. Janse van Vuuren, C. Polese
Summary: Attempts were made to improve the properties and machining performance of NbC based cermet cutting inserts by using sub-stoichiometric NbC, Cr3C2, Mo2C additives, and laser shock peening. The refined microstructure, increased hardness, and improved wear resistance were achieved by the addition of Mo2C and manufacture by spark plasma sintering (SPS). Laser shock peening (LSP) significantly enhanced the fracture toughness of all inserts and improved the tool life of NbC0.88-Ni inserts, reducing the flank wear rate and average resultant force.
SMART, SUSTAINABLE MANUFACTURING IN AN EVER-CHANGING WORLD, COMA '22
(2023)
Proceedings Paper
Materials Science, Characterization & Testing
S. N. van Staden, C. Polese, D. Glaser, J. -P. Nobre, A. M. Venter, D. Marais, J. Okasinski, J. -S. Park
MECHANICAL STRESS EVALUATION BY NEUTRON AND SYNCHROTRON RADIATION, MECA SENS 2017
(2018)
Proceedings Paper
Materials Science, Characterization & Testing
M. Newby, A. Steuwer, D. Glaser, C. Polese, D. G. Hattingh, C. Gorny
MECHANICAL STRESS EVALUATION BY NEUTRON AND SYNCHROTRON RADIATION, MECA SENS 2017
(2018)
Proceedings Paper
Materials Science, Characterization & Testing
D. Glaser, M. Newby, C. Polese, L. Berthe, A. M. Venter, D. Marais, J. P. Nobre, G. Styger, S. Paddea, S. N. van Staden
MECHANICAL STRESS EVALUATION BY NEUTRON AND SYNCHROTRON RADIATION, MECA SENS 2017
(2018)
Article
Materials Science, Multidisciplinary
D. Glaser, C. Polese
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2017)
Article
Metallurgy & Metallurgical Engineering
D. E. P. Klenam, C. Polese, L. H. Chown, S. Kwofie, L. A. Cornish
JOURNAL OF THE SOUTHERN AFRICAN INSTITUTE OF MINING AND METALLURGY
(2015)
Article
Engineering, Mechanical
Miloslav Kepka, Miloslav Kepka Jr, Radovan Minich
Summary: This paper focuses on the fatigue life evaluation of the bodywork of a new articulated electric (battery) bus. The findings resulted in recommendations to improve the operational reliability of a particular vehicle and provided challenges for future research.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
T. Dusautoir, B. Berthel, S. Fouvry, P. Matzen, K-D. Meck
Summary: This study investigates the impact of post-processing treatments on the fatigue limit of additive manufactured Ti-6Al-4V under stress gradients, with a focus on surface integrity.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Zhuofan Xia, Di Wu, Xiaochen Zhang, Jianqiu Wang, En -Hou Han
Summary: The study reveals the surface-initiated rolling contact fatigue (RCF) failure mechanism under heavy load and initial high roughness surface. The results indicate that precursor of collapsed morphology and nanocrystalline layer are the main factors causing lower RCF life with high roughness compared to low roughness surfaces. The spalling failure initiating from low roughness surface under heavy load is strongly dependent on surface plastic deformation.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Daniel Gren, Knut Andreas Meyer
Summary: Rolling contact loading can cause plastic deformation and fatigue cracks. Current rail standards do not consider the effect of plasticity on mechanical behavior. This study proposes a new method for evaluating the fatigue life of deformed material and finds that superimposed compressive axial loads can increase fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
R. Kumar, S. Sanyal, J. Bhagyaraj, E. Hari Krishna, S. Mukherjee, K. Prasad, S. Mandal
Summary: This study investigates the thermomechanical fatigue (TMF) behavior of Timetal 834 alloy under different loading conditions. The results show that the alloy exhibits different cyclic hardening and softening responses at different strain amplitudes. The strain amplitude and phase angle have significant effects on the TMF life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Kai Donnerbauer, Tobias Bill, Peter Starke, Ruth Acosta, Bharath Yerrapa, Christian Boller, Klaus Heckmann, Frank Walther
Summary: Given the aging of nuclear power plants, it is important to develop methods for evaluating the integrity of components and structures in nuclear engineering. Suitable nondestructive testing methods can detect material degradation and determine its fatigue life. This study utilized various NDT parameters and scanning electron microscopic methods to explore the relationship between microstructure evolution and NDT data.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Liuyong He, Jiang Zheng, Tianjiao Li, Houkun Zhou, Lihong Xia, Bin Jiang
Summary: This study quantitatively analyzed the effects of precipitates on the deformation mode, cracking mode, and mechanical behavior of WE54 magnesium alloy during low-cycle fatigue. It was found that precipitates promoted the activation of dislocation slip and suppressed the activation of twinning, affecting the cracking mode and mechanical behavior.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Xiangkang Zeng, Conghui Zhang, Wenguang Zhu, Mingliang Zhu, Tongguang Zhai, Xiaomei He, Kangkai Song, Zhuohang Xie
Summary: The cyclic deformation behaviors and damage mechanisms of pure Zr were investigated. The cyclic stress response was mainly influenced by substructure evolutions. Prismatic < a > dislocation slip was identified as the dominant deformation mechanism. Fatigue damage was not only influenced by the initial texture, but also other factors.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Jingyu Yang, Bingbing Li, Yiming Zheng, Gang Chen, Xu Chen
Summary: Heat treatment is used to improve the low-cycle fatigue performance of additive manufactured 316LN stainless steel. The heat-treated material demonstrates initially cyclic hardening followed by softening behavior, and shows a stronger resistance to crack propagation compared to the as-built material, resulting in a longer fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Lang Zou, Dongfang Zeng, Xiong Chen, Jun Li, Hai Zhao, Liantao Lu
Summary: This study investigates the competitive relationship between fretting fatigue and plain fatigue in press-fitted railway axles. By changing the depth of the stress relief groove, the plain fatigue limit and fretting fatigue strength were tested. Detailed information was gathered, and an evaluation methodology integrating finite element simulation and the Modified Wohler Curve Method was established. The study concludes that the optimal groove depth, which balances the anti-fatigue capabilities, depends on the number of test cycles.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Davide Leonetti, Koji Kinoshita, Yukina Takai, Alain Nussbaumer
Summary: This paper investigates the fatigue behavior of non-load-carrying transverse welded steel attachments, including fatigue crack monitoring and fracture surface analysis under constant and variable amplitude loading. A procedure is proposed to obtain a Markov transition matrix based on the measured strain signal and to randomly resample the stress history for variable amplitude fatigue tests.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Zhe Zhang, Bing Yang, Yuedong Wang, Shoune Xiao
Summary: This paper presents a method for designing fatigue life prediction models with small sample sizes by handling limited sample data. The method integrates the equivalent structural stress method with the maximum likelihood estimation method and adds reliability verification, resulting in enhanced goodness of fit, stability, and optimized sample quantity.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Cooper K. Hansen, Gary F. Whelan, Jacob D. Hochhalter
Summary: This paper presents a method to address the computational demand issue of computing FIPs using CPFEM by developing an interpretable machine learning model. Genetic programming is used to evolve interpretable expressions of FIPs from microstructure features, and these models can serve as efficient substitutes for CPFEM and be easily integrated into engineering workflows.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Luca Susmel
Summary: This paper discusses the problem of estimating notch fatigue limits using machine learning. The results show that machine learning is a promising approach for designing notched components against fatigue. The accuracy in estimating the fatigue limit can be increased by increasing the size and quality of the calibration dataset, as well as including additional input features.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Kefeng Gao, Guoqi Tan, Yanyan Liu, Qiang Wang, Qian Tang, Xuegang Wang, Qiqiang Duan, Zengqian Liu, Zhe Yi, Zhefeng Zhang
Summary: Bioinspired architectures have significant effects on material enhancement. This study investigates the fatigue properties of bioinspired ceramic-polymer composites and natural nacre, revealing the close relationship between architectural types, orientations, fatigue performance, and damage mechanisms.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
