Article
Engineering, Mechanical
Zhi Qin, Bin Li, Tianyue Chen, Chen Chen, Rui Chen, Hongchang Ma, Hongqian Xue, Changfeng Yao, Liang Tan
Summary: This study investigates the effects of conventional shot peening (CSP) and ultrasonic shot peening (USP) on the very high cycle fatigue (VHCF) properties of the GH4169 superalloy. The research examines and compares the surface roughness, X-ray diffraction patterns, microhardness, and residual stress of CSP and USP treated specimens. The findings show that both CSP and USP treatments enhance the VHCF properties of the GH4169 superalloy, but the USP-treated specimens have shorter VHCF lives due to deeper work hardening and compress residual stress layers.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Chemistry, Physical
Chengli Dong, Shengkai Yang, Zichao Peng
Summary: The study demonstrates that shot peening results in a more disorganized surface with larger hardness gradient. Furthermore, the residual stress is deeper and more evenly distributed after shot peening treatment.
Article
Engineering, Mechanical
Zhen Zhang, Zhenjie Teng, Jingyu Wang, Zhiyong Huang, Sebastian Muenstermann
Summary: The fatigue behavior of a Ni-based superalloy of grade GH4169 was investigated at room temperature and high temperature using ultrasonic and electromagnetic fatigue systems. The experiments revealed mixed-mode cracking at high temperature and pod-like structures at room temperature. Transmission electron microscopy investigations suggested that shear bands indicate the dominance of sliding movement in the microstructure variation of the high-temperature alloy.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Engineering, Mechanical
Okan Unal, Erfan Maleki, Ibrahim Karademir, Fazil Husem, Yusuf Efe, Turan Das
Summary: This study investigated the effects of different treatment methods on AISI 1050 material and found that two-stage operations can achieve high residual stress depth and magnitude on the surface. Grinding and re-shot peening treatments can significantly reduce surface roughness, and increasing shot peening intensity can greatly improve hardness.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Zhi Qin, Bin Li, Chen Chen, Tianyue Chen, Rui Chen, Han Zhang, Hongqian Xue, Changfeng Yao, Liang Tan
Summary: The study investigated the high cycle and very high cycle fatigue behavior of the GH4169 superalloy. The results showed that failures in different fatigue regimes had different initiations, and significant strain localization occurred at the twin boundaries of the material under fatigue cyclic loading.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yong Li, H. Cockings, P. M. Mignanelli, M. Whittaker, B. J. Cockings, R. Buckingham, M. R. Bache
Summary: This research investigates the low cycle corrosion-fatigue behavior of a newly developed polycrystalline nickel superalloy. It focuses on the variations in fatigue life caused by changes in surface condition and compares the high temperature corrosion-fatigue resistance behavior with a previous generation alloy, using detailed fractography to identify the mechanisms of fatigue crack initiation.
Article
Engineering, Mechanical
S. Aguado-Montero, J. Vazquez, C. Navarro, J. Dominguez
Summary: Shot peening is often used to mitigate metal fatigue in engineering components, and its effectiveness depends on various factors. The fatigue improvement is largely influenced by the residual stress profile in the specimen, and this study investigates the optimal shape for fatigue behavior. By analyzing simple and notch fatigue cases, the research aims to determine the best residual stress profile for fatigue damage tolerance design.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Materials Science, Multidisciplinary
Wenxue Qian, Yi Wang, Kexin Liu, Xiaowei Yin, Xuehong He, Liyang Xie
Summary: Shot peening is a surface peening technique that introduces residual compressive stresses to enhance the fatigue life of materials. However, stress relaxation and improper parameters can weaken its effectiveness. This study investigates the effects of shot peening pressure and coverage on fatigue life and the influence of re-shot peening on material fatigue life. The results highlight the significance of reasonable parameters and the positive impact of re-shot peening in restoring residual compressive stress and improving fatigue life.
Article
Engineering, Mechanical
Xin Wang, Chunling Xu, Xiaofeng Wang, Dianyin Hu, Shicheng Ma, Zhihui Tang
Summary: In this study, a nickel-based powder metallurgy alloy underwent various surface treatments, and the performance of different surface states was compared. The results showed that compound shot peening led to a better surface structure with a deeper compressive residual stress profile and higher hardness gradient. The low-cycle fatigue life after compound shot peening was also longer than other treatments.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Pramod Kumar, G. S. Mahobia, V. Singh, Kausik Chattopadhyay
Summary: This study investigated the effects of ultrasonic shot peening and stress relieving treatment on the low cycle fatigue behavior of Ti-13Nb-13Zr alloy. The results showed that USSP significantly increased the fatigue life, while the enhancement was lower in the USSP-SR condition, but still higher than the Un-USSP condition.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Shu-Lei Yao, Xi -Ting Zeng, Kai-Shang Li, Ji Wang, Run-Zi Wang, Ning Wang, Cheng-Cheng Zhang, Xian-Cheng Zhang, Shan-Tung Tu
Summary: The proposed deflecting abrasive waterjet peening (DAWJP) process can be used to strengthen metallic parts with confined space features, and has great potential to improve the surface integrity and fretting fatigue life of dovetail slots in turbine discs. This study investigates the effects of DAWJP and shot peening (SP) on the surface integrity and fretting fatigue performance of a nickel-based superalloy dovetail slot.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Materials Science, Multidisciplinary
Pan Yifan, Liu Daoxin, Liu Bo, Hu Yunhui, Wang Wei
Summary: This study investigates the effects of shot peening and shot peening combined vibration finishing on the fatigue properties of GH4169 superalloy. The results show that the composite treatment is more effective in improving the fatigue performance of the alloy.
RARE METAL MATERIALS AND ENGINEERING
(2022)
Article
Chemistry, Physical
Xin Wang, Chunling Xu, Aoshuang Zhai, Ming Liu, Xiao Huang, Kai Tian, Xuekun Luo, Chenguang Liu, Zhihui Tang, Zhenye Zhao
Summary: This study examines the impact of shot peening on the surface integrity of nickel-based single crystal superalloys (SX) and the evolution of stress concentration factors caused by surface finishing and casting micropores before and after shot peening through numerical simulation. It is found that shot peening results in a surface gradient plastic deformation structure on SX, significantly improving the surface yield strength and reducing stress concentration at the upper end of micropores. The rotary bending fatigue limit of the peened sample is increased by 13.0% compared to the ground state.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Wenxue Qian, Shuanghui Huang, Xiaowei Yin, Liyang Xie
Summary: In this paper, a randomly distributed multiple-shot finite element model was established for shot peening. The effects of shot velocity, shot peening angle, and shot coverage on residual stress field and surface roughness were studied. The experimental results validated the accuracy of the model and further investigated the effect of shot peening parameters on fatigue life.
Article
Engineering, Mechanical
NohJun Myung, Liang Wang, Nak-Sam Choi
Summary: The study shows that shot-peening has a positive effect on high cycle fatigue strength, but a negative impact on very high cycle fatigue strength. Fish-eye fractures mainly occur at locations deeper than the compressive residual stress zone. In the very high cycle fatigue range, the improvement in fatigue strength as a result of shot-peening treatment is almost non-existent.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2021)
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)