International Journal of Fatigue最新文献_第4页

Fatigue response and AE characteristics of soft and hard composite rock containing coplanar double joints 含共面双节理的软硬复合岩石疲劳响应及声发射特征

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-04-13 DOI: 10.1016/j.ijfatigue.2025.108994

Zeyue Wang, Su Li, Hang Lin, Yifan Chen

{"title":"Fatigue response and AE characteristics of soft and hard composite rock containing coplanar double joints","authors":"Zeyue Wang, Su Li, Hang Lin, Yifan Chen","doi":"10.1016/j.ijfatigue.2025.108994","DOIUrl":"10.1016/j.ijfatigue.2025.108994","url":null,"abstract":"<div><div>Jointed soft-hard composite rock masses are commonly encountered in engineering rock formations. The excavation-induced can lead to incompatible deformations between joints and soft-hard layers, resulting in more complex failure mechanisms compared to those under static loading. It is necessary to monitor rock micro-fracture events in real time during excavation to obtain the precursor information of rock instability. Therefore, this study conducted uniaxial compression, cyclic loading tests, and acoustic emission monitoring utilising coplanar double-jointed soft-hard composite rock masses. The fatigue characteristics of coplanar double-jointed soft-hard composite rocks were analyzed from the perspectives of strength, deformation, energy, and damage. The timing characteristics of tensile and shear signals for specimens with various joint inclinations were analyzed employing acoustic emission (AE) technology. Additionally, an early warning mechanism for rock instability based on AE multi-parameters was proposed. The results reveal that the fatigue life and limit energy storage coefficient are the lowest for the specimen with a 45° joint inclination. However, the minimum values of failure stress and failure strain occur in the specimen with a 30° inclination. During the fatigue tests, the energy density of the specimens increases in a stepwise way with the number of cycles. In addition, there is a quadratic polynomial relationship between each energy density and the upper stress limit. The realtime tensile signals of specimens exceed 60% at each stage of cyclic loading. By analyzing the variance and autocorrelation coefficient of AE parameters, it is revealed that the precursor points of failure extracted from the variance curves of peak frequency and signal intensity are closest to the final failure point.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"198 ","pages":"Article 108994"},"PeriodicalIF":5.7,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid clustering-enhanced interpretable machine learning for fatigue life prediction across various cyclic stages in laser powder bed fused Ti-6Al-4V alloy 混合聚类增强的可解释机器学习用于激光粉末床熔合Ti-6Al-4V合金不同循环阶段的疲劳寿命预测

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-04-12 DOI: 10.1016/j.ijfatigue.2025.108995

Aihua Yu , Qingjun Zhou , Yu Pan , Fucheng Wan , Fan Kuang , Xin Lu

{"title":"Hybrid clustering-enhanced interpretable machine learning for fatigue life prediction across various cyclic stages in laser powder bed fused Ti-6Al-4V alloy","authors":"Aihua Yu , Qingjun Zhou , Yu Pan , Fucheng Wan , Fan Kuang , Xin Lu","doi":"10.1016/j.ijfatigue.2025.108995","DOIUrl":"10.1016/j.ijfatigue.2025.108995","url":null,"abstract":"<div><div>Predicting the fatigue life of parts fabricated by laser powder bed fusion (LPBF) is essential for assessing their durability and reliability in mission-critical load-bearing structures. Herein, we propose a novel machine learning (ML) strategy for predicting fatigue life of LPBF parts. It combines three-stage feature screening, data augmentation, a hybrid clustering integrated regression model (H-CIRM) and SHapley Additive exPlanations (SHAP) method. The optimal number of clusters is 3, and tailored models for each cluster are gradient boosting decision trees (coefficient of determination, <em>R<sup>2</sup></em> = 0.951), random forest (<em>R<sup>2</sup></em> = 0.930) and extreme gradient boosting (<em>R<sup>2</sup></em> = 0.877), respectively. H-CIRM outperforms separate models across various cyclic stages, achieving an overall increase of over 4 % in <em>R<sup>2</sup></em> and a 22 % decrease in mean absolute error (<em>MAE</em>). The relative error is within ± 10 % on an additional experimental dataset. This strategic clustering effectively improves predicted accuracy for each cluster, markedly enhancing overall predictive. SHAP elucidates that stress amplitude (<em>σ<sub>a</sub></em>) and the complex interactions between density (<em>ρ</em>), laser volume energy density (<em>E<sub>V</sub></em>), and <em>σ<sub>a</sub></em> are the top three factors affecting fatigue life, with a relative importance greater than 20 %. This work develops a robust model for estimating fatigue life of LPBF parts and provides valuable insights into optimizing process parameters.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"198 ","pages":"Article 108995"},"PeriodicalIF":5.7,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving the fretting fatigue properties of Ti-6Al-4V dovetail joint treated by laser shock peening and shot peening 激光冲击强化和喷丸强化提高Ti-6Al-4V燕尾接头的微动疲劳性能

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-04-12 DOI: 10.1016/j.ijfatigue.2025.108996

Yan Yin , Yibo Shang , Weifeng He , Chen Wang , Liucheng Zhou

{"title":"Improving the fretting fatigue properties of Ti-6Al-4V dovetail joint treated by laser shock peening and shot peening","authors":"Yan Yin , Yibo Shang , Weifeng He , Chen Wang , Liucheng Zhou","doi":"10.1016/j.ijfatigue.2025.108996","DOIUrl":"10.1016/j.ijfatigue.2025.108996","url":null,"abstract":"<div><div>Ti-6Al-4V is widely used in aero-engine compressor blades, but its low fretting fatigue resistance makes integrity challenging. Compound treatment has been recognized as a future technology with enhanced mechanical properties. However, these attempts were limited to low-cycle fatigue. The beneficial fretting fatigue performance enhancements through compound strengthening are still prominent. This study investigates the effect of laser shock peening (LSP) and shock peening (SP) compound treatment on fretting fatigue. The experiment results show a large residual stress near the contact surface. Larger depths of surface grain refinement have also been found. Hence, the LSP + SP had the better-strengthened effect (4.57 times) on fretting fatigue life as compared with single LSP (3.94 times) or SP (2.87 times) treatment. The results reveal that LSP + SP can affect the location and number of crack initiation sites, thereby increasing the initiation life. The large depth distribution of residual stresses and the multiaxial stresses induced by fretting fatigue can mitigate stress concentration. The retardation of crack propagation by LSP + SP was also revealed by statistical analysis of fatigue striation spacing. This work provides valuable insights into the development of a strengthening process for compressor blades against fretting fatigue.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"198 ","pages":"Article 108996"},"PeriodicalIF":5.7,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Incorporating erosion and manufacturing defects in unified fatigue life models for additively manufactured TiB2/Al-Si composites 结合侵蚀和制造缺陷的增材制造TiB2/Al-Si复合材料疲劳寿命统一模型

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-04-12 DOI: 10.1016/j.ijfatigue.2025.108999

Yu Zhang , Yun-Fei Jia , Yong Zhang , Xiao Li , Kai-Ming Zhang , Hao-Liang Tian , Jun Yang , Cheng-Cheng Zhang , Fu-Zhen Xuan

{"title":"Incorporating erosion and manufacturing defects in unified fatigue life models for additively manufactured TiB2/Al-Si composites","authors":"Yu Zhang , Yun-Fei Jia , Yong Zhang , Xiao Li , Kai-Ming Zhang , Hao-Liang Tian , Jun Yang , Cheng-Cheng Zhang , Fu-Zhen Xuan","doi":"10.1016/j.ijfatigue.2025.108999","DOIUrl":"10.1016/j.ijfatigue.2025.108999","url":null,"abstract":"<div><div>Erosion damage significantly reduces the fatigue life of engine blades. To satisfy modern aircraft lightweight requirements, particle-reinforced aluminum matrix composites are replacing traditional aluminum alloys. Assessing the erosion tolerance of these advanced materials is crucial for ensuring long-term performance. This study explores the effect of solid particle erosion on the fatigue behavior of selective laser melted TiB<sub>2</sub>/Al-Si composites. Tension-tension fatigue tests were conducted under varying erosion conditions, followed by failure mechanism analysis based on fracture surface morphology. The results reveal a competitive relationship between additive manufacturing defects and erosion-induced defects in determining fatigue life. A unified method for evaluating effective defect size was developed to standardize the evaluation of erosion scars and inherent defects. Fatigue life exhibited a strong correlation with the estimated effective defect size. Extreme value statistics identified a critical defect size of 413 µm, governing this competition. Based on these findings, an erosion-fatigue life model was developed, incorporating a weighting function to dynamically switch the dominant defect type. This model effectively predicts fatigue life with a unified description of LOF and erosion defects, achieving a prediction error below 10 %. This study fills the gap in quantitative life prediction models for erosion-fatigue coupling, providing a foundation for the lifespan assessment of advanced aero-engine blades.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"198 ","pages":"Article 108999"},"PeriodicalIF":5.7,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insertion of high-R cycles into random load spectra as fractographic markers 在随机载荷谱中插入高r周期作为断口学标记

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-04-12 DOI: 10.1016/j.ijfatigue.2025.109001

Jinyu Wang, Xiaofan He, Linwei Dang, Tianchi Li

引用次数: 0

Multi-failure mode characterization and low-cycle fatigue assessment of Si C core–shell particles in the lithium-ion battery 锂离子电池硅碳芯壳颗粒多失效模式表征及低周疲劳评估

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-04-11 DOI: 10.1016/j.ijfatigue.2025.108972

Haoyu Ding , Xiaoxiao Wang , Haofeng Chen , Weiling Luan , Shan-Tung Tu

{"title":"Multi-failure mode characterization and low-cycle fatigue assessment of Si C core–shell particles in the lithium-ion battery","authors":"Haoyu Ding , Xiaoxiao Wang , Haofeng Chen , Weiling Luan , Shan-Tung Tu","doi":"10.1016/j.ijfatigue.2025.108972","DOIUrl":"10.1016/j.ijfatigue.2025.108972","url":null,"abstract":"<div><div>Si C composites are considered potential anode materials due to better cycling stability, compared to pure silicon. However, severe volume expansion of Si during cycling results in various failure forms of Si C particles, exposing the Si core to the electrolyte, generating Solid-Electrolyte Interface (SEI) films, and consuming lithium-ions in the electrolyte solution. In this paper, a coupled mechanical-chemical model is developed to analyze different failure modes of the particle during the charge and discharge cycle. Besides, the Direct Steady Cyclic Analysis (DSCA) under the Linear Matching Method (LMM) framework is utilized to evaluate the fatigue damage at the critical location of the particle. With the C shell thickness increased, the particle is more prone to debonding failure between the Si core and C shell, while a thicker C shell can mitigate the volume expansion of the Si core and alleviate fatigue damage in the C shell. This study also establishes a threshold size to identify the significant acceleration of low-cycle fatigue damage, which provides theoretical guidance for particle design.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"198 ","pages":"Article 108972"},"PeriodicalIF":5.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-cycle fatigue analysis of laser-based directed energy deposition maraging steels: Combined phase field and experimental studies 基于激光的定向能沉积马氏体时效钢的高循环疲劳分析：相场与实验相结合的研究

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-04-11 DOI: 10.1016/j.ijfatigue.2025.108970

Erfan Azinpour , Jorge Gil , Roya Darabi , Abílio de Jesus , Ana Reis , José César de Sá

{"title":"High-cycle fatigue analysis of laser-based directed energy deposition maraging steels: Combined phase field and experimental studies","authors":"Erfan Azinpour , Jorge Gil , Roya Darabi , Abílio de Jesus , Ana Reis , José César de Sá","doi":"10.1016/j.ijfatigue.2025.108970","DOIUrl":"10.1016/j.ijfatigue.2025.108970","url":null,"abstract":"<div><div>This work presents an efficient phase field fracture methodology for modeling high-cycle fatigue crack growth in laser-based Directed Energy Deposition (LDED) produced components. The model incorporates a fatigue history variable that accounts for fatigue crack propagation with sensitivity to the mean load variations by introducing an accumulative energy term. Two distinct available degradation functions are implemented to investigate their influence on fatigue crack evolution. An efficient solution strategy combining a hybrid Newton–Raphson method with an adaptive switching between full and delayed stiffness updates and envelope loading scheme is developed to handle the computational challenges of high-cycle fatigue simulations. The model’s performance regarding fatigue crack evolution and computational efficiency is evaluated through representative numerical benchmarks and sensitivity analyses. Further validation is conducted by comparing predicted fatigue crack growth rates against experimental data obtained from 18Ni300 compact tension specimens. Experimental measurements reveal that specimens with cracks propagating through build layers exhibit higher fatigue resistance than those with cracks propagating along layer interfaces. The integrated experimental-numerical methodology incorporates specimens manufactured via both conventional and LDED processes. Through adjusting of fatigue-related model parameters, the framework efficiently reproduces fatigue crack growth rate curves for AM-fabricated CT samples across different build orientations, demonstrating computational efficiency and accuracy in high-cycle fatigue analysis.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"198 ","pages":"Article 108970"},"PeriodicalIF":5.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-scale fatigue life prediction method of the A356 wheel considering the effects of casting microstructure 考虑铸造组织影响的A356车轮多尺度疲劳寿命预测方法

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-04-11 DOI: 10.1016/j.ijfatigue.2025.108977

Shihao Wang , Zhongyao Li , Haibo Qiao , Qinghuai Hou , Decai Kong , Xuelong Wu , Xiaoying Ma , Yisheng Miao , Shuwei Feng , Xiang Ci , Wenbo Wang , Yuling Lang , Shiwen Xu , Junsheng Wang

{"title":"Multi-scale fatigue life prediction method of the A356 wheel considering the effects of casting microstructure","authors":"Shihao Wang , Zhongyao Li , Haibo Qiao , Qinghuai Hou , Decai Kong , Xuelong Wu , Xiaoying Ma , Yisheng Miao , Shuwei Feng , Xiang Ci , Wenbo Wang , Yuling Lang , Shiwen Xu , Junsheng Wang","doi":"10.1016/j.ijfatigue.2025.108977","DOIUrl":"10.1016/j.ijfatigue.2025.108977","url":null,"abstract":"<div><div>A356 alloys produced by low pressure die casting (LPDC) typically contain casting defects and non-uniform microstructure. In this study, a multi-scale fatigue prediction method for the automotive wheel considering both hydrogen and shrinkage microporosity and secondary dendrite arm spacing (SDAS) has been developed. A three-dimensional cellular automata (CA) model is used to simulate both dendritic growth and hydrogen microporosity. The database of equivalent diameter of microporosity and casting conditions has been established, and the data is mapped to a structural mesh by an efficient mesh mapping algorithm in order to perform both static and dynamic simulations. The wheel’s cornering fatigue is successfully simulated by taking into account the microstructure features. By combining the high-cycle fatigue test and finite element analysis (FEA), the specific effects of stress concentration due to far-field stress, pore size, and location on fatigue life have been quantified. Based on this method, <em>S-N</em> curves have been derived for different conditions. Finally, a multi-scale fatigue life prediction model for the wheel is developed and the corresponding <em>S-N</em> curves are imported for each node of the model, enabling accurate prediction of the cornering fatigue life of the wheel. This method innovatively proposes integrative optimization of automotive wheel manufacturing process.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"198 ","pages":"Article 108977"},"PeriodicalIF":5.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of temperature-dependent viscoplastic relaxation and strain-induced martensitic transformation on the fatigue life of 304L stainless steel 温度相关粘塑性松弛和应变诱发马氏体相变对304L不锈钢疲劳寿命的影响

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-04-09 DOI: 10.1016/j.ijfatigue.2025.108992

R. Mansour , P. Enblom , M. Subasic , A. Ireland , F. Gustavsson , B. Forssgren , P. Efsing

{"title":"Influence of temperature-dependent viscoplastic relaxation and strain-induced martensitic transformation on the fatigue life of 304L stainless steel","authors":"R. Mansour , P. Enblom , M. Subasic , A. Ireland , F. Gustavsson , B. Forssgren , P. Efsing","doi":"10.1016/j.ijfatigue.2025.108992","DOIUrl":"10.1016/j.ijfatigue.2025.108992","url":null,"abstract":"<div><div>This work investigates the interaction between two competing mechanisms on the fatigue life of 304L stainless steel, martensitic transformation and viscoplastic relaxation, as well as the potential fatigue life enhancement of a single hold time applied prior to cyclic loading. At 300 °C, a tensile load hold time of 15 h applied prior to alternating cyclic loading resulted in an increase in mean fatigue life, exceeding 20 % in the studied low cycle fatigue regime. The observed enhancement is primarily attributed to viscoplastic effects during the hold time, which reduces the maximum stress and fatigue crack growth rate in cyclic loading. At room temperature, the opposite effect was observed. A strain-induced martensitic transformation resulted in a secondary cyclic hardening and a brittle final softening phase. The transformation was enhanced by the hold time, which led to increased brittleness and therefore reduced fatigue life. However, viscoplastic relaxation attenuated the detrimental effect of martensite, as was observed by a 15 % decrease in maximum stress. This study not only demonstrates the positive impact of an extended hold time at elevated temperature on the low cycle fatigue behavior but also analyzes underlying competing mechanisms at room temperature through an in-depth experimental investigation.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"198 ","pages":"Article 108992"},"PeriodicalIF":5.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing high-temperature fatigue resistance of TC11 titanium alloy through combined plasma zirconizing and ultrasonic surface rolling 采用等离子体锆化和超声表面轧制相结合的方法提高TC11钛合金的耐高温疲劳性能

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-04-09 DOI: 10.1016/j.ijfatigue.2025.108993

Junnan Wu, Daoxin Liu, Xiaohua Zhang, Yanjie Liu, Zhiqiang Yang, Junfeng Xiang

{"title":"Enhancing high-temperature fatigue resistance of TC11 titanium alloy through combined plasma zirconizing and ultrasonic surface rolling","authors":"Junnan Wu, Daoxin Liu, Xiaohua Zhang, Yanjie Liu, Zhiqiang Yang, Junfeng Xiang","doi":"10.1016/j.ijfatigue.2025.108993","DOIUrl":"10.1016/j.ijfatigue.2025.108993","url":null,"abstract":"<div><div>To boost the fatigue resistance characteristics of TC11 titanium alloy under thermo-mechanical coupling, the effects of plasma zirconizing (Zr), ultrasonic surface rolling process (USRP), and the plasma zirconizing followed by USRP treatment (Zr + USRP) on the high-temperature fatigue behavior of TC11 titanium alloy were investigated. The findings indicate that the plasma zirconizing induced microstructural weakening and stress concentration in surface regions, reducing the fatigue resistance at 500 ℃. The USRP treatment increased the fatigue limit of TC11 alloy samples by 5.5 % at 500 °C. And this enhancement was attributed to the surface layer microstructural refinement, surface roughness reduction, the introduction of compressive residual stress (CRS) field characterized by a deep distribution and high magnitude, which suppressed the initiation and propagation of fatigue cracks at high temperature. The high-temperature fatigue limit of the TC11 alloy was further increased by 7.3 % with the combined Zr + USRP treatment. Plasma zirconisation produced a solid solution strengthening effect pinning the dislocations formed treated by the USRP, improving the CRS field stability and microstructural stability of the TC11 alloy treated using USRP in the thermo-mechanical coupling environment. As a result, the initiation and propagation of fatigue cracks in TC11 alloy had been effectively prevented under high-temperature conditions.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"198 ","pages":"Article 108993"},"PeriodicalIF":5.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0