International Journal of Fatigue最新文献_第6页

Mechanism investigation of anisotropy in impact fatigue property of laser-deposited Ti-6Al-4V

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-03-02 DOI: 10.1016/j.ijfatigue.2025.108906

Sihan Zhao , Kangbo Yuan , Boli Li , Yushan Liu , Ruifeng Wang , Minghao Wang , Lin Jing , Weiguo Guo

{"title":"Mechanism investigation of anisotropy in impact fatigue property of laser-deposited Ti-6Al-4V","authors":"Sihan Zhao , Kangbo Yuan , Boli Li , Yushan Liu , Ruifeng Wang , Minghao Wang , Lin Jing , Weiguo Guo","doi":"10.1016/j.ijfatigue.2025.108906","DOIUrl":"10.1016/j.ijfatigue.2025.108906","url":null,"abstract":"<div><div>For structures that are subjected to repeated impacts in service, it is critical to evaluate their impact fatigue life. When we tested the impact fatigue performance of laser metal deposited (LMD) Ti-6Al-4V (Ti64) in different orientations with our newly developed impact fatigue test device, it was found that its impact fatigue life exhibits anisotropy. Therefore, this study carried out systematic impact fatigue tests and microscopic analysis to reveal the source of anisotropy in the impact fatigue life of LMD Ti64. The SEM results show that the fatigue crack propagation process can be divided into two stages: short crack and long crack propagation stages. The impact fatigue crack propagates along the α laths and β columnar grain boundaries at the short crack stage, while directly through columnar grains at the long crack stage. Therefore, the fatigue life at the short crack stage exhibits anisotropy. Another important finding is that the impact fatigue life is significantly shorter than the non-impact fatigue life. This is due to the large localized plastic deformation caused by the impact load, which leads to the early initiation of cracks. This work contributes to revealing the fatigue failure mechanism of LMD Ti64 under repeated impact loading.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"196 ","pages":"Article 108906"},"PeriodicalIF":5.7,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549476","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

Variance integral method for predicting in-plane biaxial fatigue life under asynchronous sinusoidal loading

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-03-02 DOI: 10.1016/j.ijfatigue.2025.108905

Youzhi Liu, Yunlong Li, Jinglong Zhao, Peifei Xu, Peiwei Zhang, Qingguo Fei

{"title":"Variance integral method for predicting in-plane biaxial fatigue life under asynchronous sinusoidal loading","authors":"Youzhi Liu, Yunlong Li, Jinglong Zhao, Peifei Xu, Peiwei Zhang, Qingguo Fei","doi":"10.1016/j.ijfatigue.2025.108905","DOIUrl":"10.1016/j.ijfatigue.2025.108905","url":null,"abstract":"<div><div>The asynchronous fatigue loading typically leads to a more complex damage mechanism and early fatigue failure. In this study, a novel Variance Integral Method (VIM) is proposed based on the framework of the integral method to determine an equivalent stress for fatigue life prediction under asynchronous loading. Firstly, the equivalent stress is obtained by performing a spherical integration of the resolved stress across all material planes, rather than focusing on a critical plane, to avoid the complexity of direction selection. Subsequently, asynchronous in-plane biaxial fatigue experiments were conducted on 8 nickel-based superalloy cruciform specimens at 420 °C, considering variations in frequency ratios and initial phase differences. Predicted fatigue lives under different loading paths were evaluated using the modified Papadopoulos model. The results show that the predicted fatigue lives are in good agreement with the experimental data, with a scatter factor within 2 about the mean life. Additionally, the effects of asynchrony including the frequency ratio and the phase difference effects are discussed. The findings suggest that the in-plane biaxial fatigue loading path does not induce non-proportional additional hardening of materials.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"197 ","pages":"Article 108905"},"PeriodicalIF":5.7,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578454","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

Fatigue fracture mechanism and life prediction of nickel-based single crystal superalloy with film cooling holes considering initial manufacturing damage 带薄膜冷却孔的镍基单晶超合金的疲劳断裂机理和寿命预测（考虑初始制造损伤

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-03-01 DOI: 10.1016/j.ijfatigue.2025.108902

Fei Li , Zhixun Wen , Lei Luo , Xi Ren , Yuan Li , Haiqing Pei , Zhufeng Yue

{"title":"Fatigue fracture mechanism and life prediction of nickel-based single crystal superalloy with film cooling holes considering initial manufacturing damage","authors":"Fei Li , Zhixun Wen , Lei Luo , Xi Ren , Yuan Li , Haiqing Pei , Zhufeng Yue","doi":"10.1016/j.ijfatigue.2025.108902","DOIUrl":"10.1016/j.ijfatigue.2025.108902","url":null,"abstract":"<div><div>Film cooling holes (FCHs) in nickel-based single crystal superalloy turbine blades are critical yet fracture-prone regions, where assessing initial manufacturing damage and predicting fatigue life remain significant challenges. This study employs the equivalent initial flaw size (EIFS) model to evaluate initial damage in FCH structures and introduces a probabilistic fracture mechanics framework for fatigue life prediction. A 3D helical fluid dynamics model is developed to compute temperature and stress fields at FCH edges. A multi-angle rotatable 3D XRD device measures six interplanar spacings, enabling residual stress assessment in FCH micro-regions and validating manufacturing simulations. By quantifying geometric, metallurgical, and mechanical parameters, the initial damage state of FCHs is characterized. The EIFS strategy, applied via the time to crack initiation (TTCI) method, comprehensively quantifies this damage. The study investigates fatigue fracture mechanisms, proposes a unified crack extension driving force (Δ<em>M</em><sub>eff</sub>), and develops a probabilistic fracture mechanics model. Using the “double 95″ EIFS (EIFS<sub>95/95</sub>) within probabilistic crack propagation rates, the fatigue life of FCHs at 850 °C is predicted and experimentally validated. Results reveal that initial damage significantly influences crack initiation and propagation, with thermal damage zones exhibiting high dislocation activity and oxidation-induced γ’-free areas serving as critical crack initiation sites. The EIFS<sub>95/95</sub> value is calculated as 0.0429 mm, and predicted fatigue life falls within a two-fold scatter band compared to experimental data. This study successfully predicts fatigue life while accounting for initial manufacturing damage, providing a novel approach for designing FCHs with improved longevity and reliability.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"197 ","pages":"Article 108902"},"PeriodicalIF":5.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143561883","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

The effect of gear module on bending fatigue failure location in carburized and shot-peened spur gears 齿轮模数对渗碳和喷丸正齿轮弯曲疲劳失效位置的影响

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-28 DOI: 10.1016/j.ijfatigue.2025.108901

Ivan Čular, Ivica Galić, Robert Mašović, Krešimir Vučković

{"title":"The effect of gear module on bending fatigue failure location in carburized and shot-peened spur gears","authors":"Ivan Čular, Ivica Galić, Robert Mašović, Krešimir Vučković","doi":"10.1016/j.ijfatigue.2025.108901","DOIUrl":"10.1016/j.ijfatigue.2025.108901","url":null,"abstract":"<div><div>Shot-peening is an emerging method used to improve the bending fatigue resistance of carburized gears. However, even though this method improves the bending fatigue resistance at the surface, bending fatigue crack initiation often shifts below the surface, making it harder to detect during regular service intervals. In this paper, an experimentally validated computational model based on the finite element analysis and the multilayer method is used to investigate the effect of gear geometry, specifically its module, on the probability of subsurface bending fatigue failure. The main goal is to reduce the chance of subsurface bending fatigue failure while retaining the beneficial effects of shot-peening. Four optimal gear modules are chosen for the investigation with respect to bending fatigue while maintaining constant fatigue properties and residual stress profiles. The results demonstrate that choosing a lower module decreases the probability of subsurface bending fatigue crack initiation in carburized and shot-peened gears. Lastly, it is also suggested that optimizing carburization parameters may enhance the beneficial compressive residual stresses below the surface, lowering the probability of subsurface bending fatigue crack initiation.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"196 ","pages":"Article 108901"},"PeriodicalIF":5.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534151","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

Effect of heat input on microstructural characteristics and fatigue property of heat-affected zone in a FH690 heavy-gauge marine steel

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-24 DOI: 10.1016/j.ijfatigue.2025.108898

Y. Bai , X. Guo , X.J. Sun , G.Y. Liu , Z.J. Xie , X.L. Wang , C.J. Shang

{"title":"Effect of heat input on microstructural characteristics and fatigue property of heat-affected zone in a FH690 heavy-gauge marine steel","authors":"Y. Bai , X. Guo , X.J. Sun , G.Y. Liu , Z.J. Xie , X.L. Wang , C.J. Shang","doi":"10.1016/j.ijfatigue.2025.108898","DOIUrl":"10.1016/j.ijfatigue.2025.108898","url":null,"abstract":"<div><div>We demonstrated here the effect of welding heat input on the microstructure characteristics and fatigue behavior of the multi-pass welded joint of a FH690 grade ultra-heavy steel plate. The welded joint with a heat input of ∼15 kJ/cm exhibited higher ultimate fatigue stress (407 MPa at endurance limit of 10<sup>7</sup> cycles) than that of ∼50 kJ/cm. Moreover, the welded joint with a heat input of ∼15 kJ/cm fractured within weld metal (WM), while it fractured within the coarse-grained heat affected zone (CGHAZ) with ∼50 kJ/cm. Microstructure characterization revealed that uniform lath bainite was obtained in CGHAZ by ∼15 kJ/cm heat input, whereas granular bainite with martensite-austenite (MA) constituents was obtained in CGHAZ with ∼50 kJ/cm. Transmission electron microscopy (TEM) observations showed that twin martensite was observed in MA constituents. TEM observations suggested that twin martensite played a significant role in fatigue cracking by three aspects: 1) directly crack at interface between MA constituent and matrix; 2) promote the formation of micro-voids within coarse granular bainite; 3) nano grains were observed surrounding the twin martensite near to the fractured surface, suggesting plastic deformation locally occurred in bainite lath, resulting in recrystallization and soften, which promoted crack initiation.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"196 ","pages":"Article 108898"},"PeriodicalIF":5.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508357","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

A stacked cylinder approach for standardized high-throughput uniaxial fatigue characterization

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-24 DOI: 10.1016/j.ijfatigue.2025.108889

Grant West , Wenjia Gu , David Walker , Derek H. Warner

{"title":"A stacked cylinder approach for standardized high-throughput uniaxial fatigue characterization","authors":"Grant West , Wenjia Gu , David Walker , Derek H. Warner","doi":"10.1016/j.ijfatigue.2025.108889","DOIUrl":"10.1016/j.ijfatigue.2025.108889","url":null,"abstract":"<div><div>Despite the critical importance of mechanical reliability in our modern economy, the prediction of fatigue failures remains a challenging endeavor. Traditional fatigue testing methods are not only slow and costly but also plagued by high variability, making it difficult to calibrate predictive models for real-world utilization. Towards addressing this challenge, we present a uniaxial mechanical fatigue testing concept that aims to increase testing throughput by more than an order of magnitude, while maintaining testing cost and consistency with popular standards, ASTM E466 and ISO 1099. After considering various concepts to enhance uniaxial fatigue testing throughput, we present a mechanical analysis of the most promising concept. A prototyped design was developed and demonstrated with 39 aluminum 6061-T6511 test specimens subjected to 2 million loading cycles. The performance of the prototype was assessed against the popular standards via numerous strain gauge measurements over the duration of the test and by comparing the failure distribution to a traditional MMPDS fatigue dataset. Ultimately, the prototyped high throughput design produced fatigue life data that was in general agreement with the traditional MMPDS dataset. To close, the authors present potential extensions and applications to the method.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"196 ","pages":"Article 108889"},"PeriodicalIF":5.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new methodology for analysing the fatigue behaviour of filled natural rubber using rotating shear deformation experiments and FEM analysis

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-22 DOI: 10.1016/j.ijfatigue.2025.108888

M. Abdelmoniem , B. Yagimli , M. Barkhoff , F. Duisen

{"title":"A new methodology for analysing the fatigue behaviour of filled natural rubber using rotating shear deformation experiments and FEM analysis","authors":"M. Abdelmoniem , B. Yagimli , M. Barkhoff , F. Duisen","doi":"10.1016/j.ijfatigue.2025.108888","DOIUrl":"10.1016/j.ijfatigue.2025.108888","url":null,"abstract":"<div><div>Understanding the fatigue behaviour of natural rubber is crucial for designing rubber components such as chassis and motor mounts. These components experience multiaxial loading during operation, which affects both mechanical behaviour and lifetime, for instance, due to self-heating or strain-induced crystallisation. In this study, a new methodology is introduced to analyse the fatigue behaviour of natural rubber under multiaxial loading. The loading is applied to the rubber sample through rotating shear deformation. A straightforward experimental set-up is employed to perform fatigue tests, where parameters like deformation amplitude and stress ratio are predetermined using a simulation model. Using this model, two load ratios for the tests are set. With the same amplitude loading, a higher load ratio provides lifetime reinforcement. The predicted behaviour aligns with the literature on natural rubber. A thermomechanically coupled finite viscoelastic model is used to determine the surface and internal temperatures of the sample. The predicted surface temperature and forces show good agreement with experimental results. This methodology provides valuable insights into how temperature distribution, local stress variation, and the stress ratio impact mechanical behaviour and fatigue life.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"196 ","pages":"Article 108888"},"PeriodicalIF":5.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A phase-field length scale insensitive model for fatigue failure in brittle materials

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-20 DOI: 10.1016/j.ijfatigue.2025.108875

Ayyappan Unnikrishna Pillai, Mohammad Masiur Rahaman

{"title":"A phase-field length scale insensitive model for fatigue failure in brittle materials","authors":"Ayyappan Unnikrishna Pillai, Mohammad Masiur Rahaman","doi":"10.1016/j.ijfatigue.2025.108875","DOIUrl":"10.1016/j.ijfatigue.2025.108875","url":null,"abstract":"<div><div>This article proposes a novel phase-field length scale insensitive model for fatigue failure in brittle materials. In the proposed model, we incorporate a necessary fatigue-related parameter to define the fatigue threshold energy as a function of the fracture strength and make the mechanical response of a material insensitive to the phase-field length scale. In the proposed model, we derive the governing partial differential equations by invoking the virtual power principle and assume constitutive relations for the thermodynamic fluxes on satisfying the thermodynamic laws. We provide a consistent derivation for determining the parameters that appear in the degradation function. We demonstrate the efficacy of the proposed model by generating phase-field length scale insensitive response in terms of crack length and maximum amplitude of load versus number of cycles for a few representative numerical examples, viz. a three-point bending test, a single-edge and a double-edge notched plate under low cycle fatigue. The numerical results highlight excellent insensitivity of the global mechanical response to the phase-field length scale parameter, validating the robustness of the proposed model. For numerical implementation, we have utilized an open-source finite element toolbox called Gridap, available in a high-performance programming language Julia, that facilitates third-party verification, promotes transparency and reproducibility, and sets a benchmark for efficient open-source code development in the scientific community.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"196 ","pages":"Article 108875"},"PeriodicalIF":5.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479434","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

Fatigue crack propagation behavior of 2195 Al-Li alloy plate at low temperature

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-20 DOI: 10.1016/j.ijfatigue.2025.108890

Yingzhi Li, Cunsheng Zhang, Zinan Cheng, Zijie Meng, Liang Chen, Guoqun Zhao

{"title":"Fatigue crack propagation behavior of 2195 Al-Li alloy plate at low temperature","authors":"Yingzhi Li, Cunsheng Zhang, Zinan Cheng, Zijie Meng, Liang Chen, Guoqun Zhao","doi":"10.1016/j.ijfatigue.2025.108890","DOIUrl":"10.1016/j.ijfatigue.2025.108890","url":null,"abstract":"<div><div>Great attention has been attached to Al-Li alloys due to their excellent performance for aerospace structural components, which endure low-temperature environments and cyclic loads, posing intense demands on the fatigue resistance of materials. In this work, the fatigue crack propagation (FCP) behaviors at low temperatures (−80 °C) of as-rolled 2195 Al-Li alloy have been investigated and compared with those at room temperature. It was found that the influence of grain boundaries and secondary phase particles on FCP is direction-dependent: both of them accelerate FCP in the parallel rolling direction (TL) and impede FCP in the perpendicular rolling direction (LT). Meanwhile, the grains with high Schmid factors have an attractive effect on the FCP path, but this effect diminishes at low temperature. The weakened dislocation movement at low temperature impedes cracks from entering the grains and propagating along the slip planes, resulting in crack deflection and propagation along grain boundaries. This mechanism retards the rate of FCP and significantly enhances the fatigue resistance of Al-Li alloys at low temperature.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"196 ","pages":"Article 108890"},"PeriodicalIF":5.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471188","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

Mode-{I, III} multiaxial fatigue testing of high-quality welds in steel maritime structures using a hexapod

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2025-02-18 DOI: 10.1016/j.ijfatigue.2025.108870

Gabriele Bufalari, Niels Troost, Henk den Besten, Miroslaw Lech Kaminski

{"title":"Mode-{I, III} multiaxial fatigue testing of high-quality welds in steel maritime structures using a hexapod","authors":"Gabriele Bufalari, Niels Troost, Henk den Besten, Miroslaw Lech Kaminski","doi":"10.1016/j.ijfatigue.2025.108870","DOIUrl":"10.1016/j.ijfatigue.2025.108870","url":null,"abstract":"<div><div>Facing multiaxial fatigue testing challenges with respect to non-proportional loading conditions, a custom-built hexapod has been used to establish the mode-{I, III} resistance characteristics of high-quality welds in steel maritime structures. Assessment of the hexapod test data using the effective notch stress and total stress, respectively the best performing multiaxial intact and cracked geometry parameters, shows a fit in the reference quality literature data scatter band and provides conservative lifetime estimates. In order to improve the lifetime estimate accuracy, strength, geometry, material and mechanism aspects are investigated. Welding induced residual stress, a strength aspect, predominantly affects the mode-I fatigue resistance including a mean (residual) stress contribution. The weld notch radius, a geometry parameter, primarily influences the mode-III fatigue resistance. Similar material microstructure compositions of the high-quality welds and reference quality ones are observed, implying comparable mode specific mechanism parameters for the effective notch stress and total stress, respectively the material characteristic length and elastoplasticity coefficient. The material microstructure properties and classification criteria for high-quality welds support the residual stress estimates and suggest a smaller welding induced defect size. In general, the high quality is mainly reflected in the larger resistance curve intercept and slope, another strength and mechanism parameter, implying a larger initiation contribution to the total lifetime. For a high-quality resistance curve involving the representative strength, geometry, material and mechanism contributions, more accurate lifetime estimates are obtained, even though the parameter confidence is reduced because of the relatively small data size in comparison to the reference quality one.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"197 ","pages":"Article 108870"},"PeriodicalIF":5.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143592899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0