Academic literature on the topic 'Macrocrack'

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Journal articles on the topic "Macrocrack"

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Eterashvili, Tamaz, G. Abuladze, L. Kotiashvili, T. Dzigrashvili, and M. Vardosanidze. "SEM Study of Fatigue Crack Propagation in Chromium Martensitic Steel after LCF." Key Engineering Materials 754 (September 2017): 15–18. http://dx.doi.org/10.4028/www.scientific.net/kem.754.15.

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Crack propagation after low-cycle fatigue (LCF) deformation has been studied in the chromium martensitic structural steel. Although the study of a fundamental mechanism of fatigue crack growth has received much attention over the last decade, it still remains a sufficiently complex problem and needs full understanding. Moreover, the recent studies show that the cracks propagate discontinuously even on the millisecond timescale, and their growth rate significantly depends on a microstructure of the material. In the present work the boundaries of the former austenitic grains were revealed on the
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Winkler, Andreas, Pia Bunger, Paula Morales Lang, Christine Schumann, Martin Brüggenwirth, and Moritz Knoche. "Mode of Action of Calcium in Reducing Macrocracking of Sweet Cherry Fruit." J. Amer. Soc. Hort. Sci. 149, no. 2 (2024): 61–74. http://dx.doi.org/10.21273/jashs05354-23.

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Rain cracking (hereinafter referred to as macrocracking) severely impacts the production of sweet cherry (Prunus avium). Calcium (Ca) sprays can reduce macrocracking, but the reported responses to Ca sprays are variable and inconsistent. The objective of this study was to establish the physiological mechanism through which Ca reduces macrocracking in sweet cherry fruit. Six spray applications of 50 mM CaCl2 had no effect on macrocracking (assessed using a standardized immersion assay) despite a 28% increase in the Ca-to-dry mass ratio. Similarly, during another experiment, there was no effect
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Li, Xu, Xiaotao Li, Hongda Yang, and Xiaoyu Jiang. "Interaction between a Macrocrack and a Cluster of Microcracks by Muskhelishvili’s Complex Potential Method." Mathematical Problems in Engineering 2018 (October 9, 2018): 1–12. http://dx.doi.org/10.1155/2018/8049318.

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The interaction between a macrocrack and a cluster of microcracks has been investigated based on Muskhelishvili’s complex potential method. A step-by-step subproblem procedure is used to satisfy the stress boundary conditions on each crack surface. The interactions between a cluster of microcracks and a macrocrack and the interaction among microcracks are analyzed. Three damage configurations as chained, reverse-chained, and randomly distributed microcracks have been designed to simulate the damage around the macrocrack tip. The solution of an infinite elastic plane containing a macrocrack and
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Popov, А. V., V. Yu Voloshina, E. M. Evdokimov, and D. S. Krivoshein. "A MODEL FOR ASSESSING THE DEGREE OF DANGER OF DEFECTS IN ACOUSTIC EMISSION DIAGNOSTICS OF PIPELINES OF HYDRAULIC SYSTEMS OF AIRCRAFT." Kontrol'. Diagnostika, no. 320 (February 2025): 14–21. https://doi.org/10.14489/td.2025.02.pp.014-021.

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A model for assessing the degree of hazard of defects has been developed, based on identifying the moment of formation of macrocracks (predestruction state) in the material of steel pipelines of aircraft hydraulic systems during their loading, where the deviation of the parameters of the recorded amplitude distributions of acoustic emission from the Poisson type is used as a criterion for the formation of a macrocrack. The results of experimental studies of controlled steel pipelines of the 12X18N10T brand under the pressure of the working fluid on a hydraulic test bench are presented.
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Rubinstein, A. A. "Macrocrack-Microdefect Interaction." Journal of Applied Mechanics 53, no. 3 (1986): 505–10. http://dx.doi.org/10.1115/1.3171803.

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Elastic interactions (in terms of the stress intensity factor variation) of the macrocrack (represented as semi-infinite crack) with microdefects such as finite size, arbitrarily positioned crack, circular hole or inclusion are considered. A solution for the problem of the interaction with dilational inclusion is also given. The influence of the crack tip geometry on the surrounding stress field is studied by analyzing the case of crack-hole coalescence. Problems are considered in terms of complex stress potentials for linear elasticity and formulated as a singular integral equation on the sem
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Taufiqullah, Taufiqullah, Setyo Nugroho Adhi, Dadan Ramdan Raden, Sasmita Firmansyah, Rodotun Siti, and Ramelan Aditianto. "Fabrication of macrocrack-free thick chromium duplex plating for remanufacturing applications." Eastern-European Journal of Enterprise Technologies 3, no. 12 (117) (2022): 42–51. https://doi.org/10.15587/1729-4061.2022.258728.

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The remanufacturing process of a hydraulic cylinder rod becomes a challenging prospect in the industrial sector producing heavy equipment. That is because remanufactured components can have the same product quality as new components with a more economical price. Hard chromium electrodeposition is a well-known technique to provide a protective coating for the cylinder rod so that it has favorable wear and corrosion resistance properties. Associated with remanufacturing applications, the used chromium plating covering the cylinder rod should be removed first before applying the new chromium one.
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Sahnoun, Mohamed, Djamel Ouinas, B. Bachir Bouiadjra, J. Vina Olay, and J. Vina Olay. "Numerical Modelling of the Interaction Macro–Multimicrocracks in a Pipe under Tensile Stress." Advanced Materials Research 1105 (May 2015): 245–50. http://dx.doi.org/10.4028/www.scientific.net/amr.1105.245.

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In this paper, the evaluation of the SIFof a macrocrack in interaction with one or several microcracks in a material containing a geometrical defect was investigated. Several configurations were considered in order to apprehend the mechanisms induced by the interaction effect and in particular the effects of reduction and/or amplification of the stress field between macro and single or multiple microcracks. The obtained results show that, macro–microcrack spacing is an important parameter if the microscopic crack is relatively close to the macrocrack-tip. The macrocrack has the tendency to acc
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Du, Jianhuan, Jingang Wang, and Zhu Fu. "Influence of Interaction between Microcracks and Macrocracks on Crack Propagation of Asphalt Concrete." Materials 17, no. 12 (2024): 2877. http://dx.doi.org/10.3390/ma17122877.

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This paper aims to reveal the interaction relationship between microcracks and macrocracks and the influence of the interaction on the crack propagation behavior. A theoretical model of asphalt concrete was established for the interaction between microcracks with different crack densities and a macrocrack. And a meso-structure model of AC-13 dense-graded asphalt concrete was established by combining the Talyor medium method and the DEM (discrete element method). Macro and micro parameters, such as the stress–strain characteristics, crack evolution parameters, and crack tip stress field, were o
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Chen, L. H., K. C. Huang, and Y. C. Chen. "Acoustic Emission at Wedge Indentation Fracture in Quasi-Brittle Materials." Journal of Mechanics 25, no. 2 (2009): 213–23. http://dx.doi.org/10.1017/s1727719100002677.

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AbstractTo improve the safety and automation of mechanical excavation methods used in tunnels, this present report studied the behavior of rock materials indented by a single cutter, based on the theory of indentation fracture mechanics. The development of microcracks during the indentation process and the correlation between microcracks and macrocracks was investigated using the nondestructive technique of acoustic emission. Microseismic activity of the microcracks received by the acoustic emission (AE) technique was used to interpret and represent the initiation and propagation of macrocrack
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Eterashvili, Tamaz, T. Dzigrashvili, and M. Vardosanidze. "Initial Aspects of Low-Cycle Fatigue Fracture of Martensitic Steels." Key Engineering Materials 348-349 (September 2007): 385–88. http://dx.doi.org/10.4028/www.scientific.net/kem.348-349.385.

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This study deals with the SEM and optical microscopic characterization of fatigue plastic deformation process during fatigue crack initiation to understand where, why and how cracks initiate under conditions of low cycle fatigue. Samples were prepared from the 13Х11Н2В2МФ high-chromium stainless steel used for fusion power applications. The low-cycle tests were conducted at room temperature with the standard V-notched samples prepared from conventional stainless steel. The following characteristics were studied during fatigue tests: 1 macrocrack propagation, 2. interaction between macrocrack a
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Dissertations / Theses on the topic "Macrocrack"

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Dewangan, Gainendra Kumar. "Fatigue Crack-macrocrack Interaction in 316 Stainless Steel Sheet." Thesis, 2018. http://ethesis.nitrkl.ac.in/9536/1/2018_MT_216MM2442_GKDewangan_Fatigue.pdf.

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Defects are introduced in engineering materials during various stages of metal extraction, processing and fabrication. Defects are also introduced to fulfil certain engineering requirement and also during services. A growing fatigue crack is likely to interact with these material discontinuities. The presence of these defects may alter the stress field, crack growth rate and also deflect the crack path. The aim of this investigation is to study the interaction of a growing crack emanating from the semi-circular hole and a macrocrack in 316 stainless steel sheet. The stud
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Books on the topic "Macrocrack"

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Rubinstein, A. A. Macrocrack interaction with transverse array of microcracks. National Aeronautics and Space Administration, 1987.

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Book chapters on the topic "Macrocrack"

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Chen, Yi-Heng. "Macrocrack Microcrack Interaction in Piezoelectric Materials." In Advances in Conservation Laws and Energy Release Rates. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9908-5_6.

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Chen, Yi-Heng. "Macrocrack Microcrack Interaction in Dissimilar Anisotropic Materials." In Advances in Conservation Laws and Energy Release Rates. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9908-5_5.

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Zhou, Weisheng, Naoya Tada, and Junji Sakamoto. "Effect of Small Inner Cracks on Macrocrack Propagation." In Creep-Fatigue Fracture: Analysis of Internal Damage. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-1879-5_7.

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Loehnert, Stefan, and Dana Mueller-Hoeppe. "3D Multiscale Projection Method for Micro-/Macrocrack Interaction Simulations." In Recent Developments and Innovative Applications in Computational Mechanics. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17484-1_25.

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Tricoire, A., M. Vardelle, P. Fauchais, F. Braillard, A. Malié, and P. Bengtsson. "Macrocrack Formation of Thick Pass Deposited Stabilised Zirconia TBCs." In Surface Modification Technologies XVIII: Proceedings of the Eighteenth International Conference on Surface Modification Technologies Held in Dijon, France November 15-17, 2004: v. 18, 18th ed. CRC Press, 2023. http://dx.doi.org/10.1201/9781003423874-11.

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Hill, Michael D., Grady S. White, and Isabel K. Lloyd. "Effect of Remanent Polarization Level on Macrocrack Extension in Lead Zirconate Titanate (PZT)." In Fracture Mechanics of Ceramics. Springer US, 1996. http://dx.doi.org/10.1007/978-1-4615-5853-8_44.

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Khimulia, V. V., and V. I. Karev. "Applications of 3D Digital Methods of CT Image Processing to Study Macrocracks in Low-Permeability Rocks Formed When Modeling on Specimens the Method of Directed Unloading of the Reservoir." In Springer Proceedings in Earth and Environmental Sciences. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-88459-7_39.

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ZHANG, CH. "Macrocrack–Microcrack Configurations Under Impact Loading." In Proceedings of The 7th International Conference On Fracture (ICF7). Elsevier, 1989. http://dx.doi.org/10.1016/b978-0-08-034341-9.50097-8.

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"Macrocrack propagation in materials with multi-scale microcracking." In Fracture and Damage of Concrete and Rock - FDCR-2. CRC Press, 1993. http://dx.doi.org/10.1201/9781482271287-39.

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Rossi, P., C. Nader, and J. L. Tailhan. "Probabilistic cracking model for macrocrack propagation in reinforced concrete structures." In Computational Modelling of Concrete Structures. CRC Press, 2018. http://dx.doi.org/10.1201/9781315182964-70.

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Conference papers on the topic "Macrocrack"

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Yamane, Y., N. Totsuka, M. Kimura, T. Kurisu, K. Motoda, and Y. Nakai. "Effect of Ni on Sulfide Stress Corrosion Cracking in Low Alloy Steels." In CORROSION 1986. NACE International, 1986. https://doi.org/10.5006/c1986-86167.

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Abstract The Sulfide Stress Corrosion Cracking (SSC) behavior of low alloy steels was examined in aqueous solutions containing various amounts of hydrogen sulfide (H2S), using 4 point bend beam specimens. A number of transgranular microcracks were found in specimens immersed in solutions of low H2S concentrations. The morphology of these microcracks was markedly different from that of macrocracks observed in more highly concentrated H2S solutions, which are considered to have been caused by hydrogen embrittlement (HE). The microcracks in high-strength or Ni containing steels were sharp and dee
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Aboayanah, Kareem Ramzy, Lei Sun, and Giovanni Grasselli. "Investigating Thermal Gradient Cracking and Fracture Process Zone Development in Granitic Rocks." In International Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/igs-2023-0289.

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Abstract Thermal stresses developed under disturbed temperature field induce thermal cracking when material’s strength is exceeded. In this paper, digital image correlation (DIC) and thermo-mechanical finite-discrete element method (FDEM-TM) simulations were adopted to investigate thermal gradient cracking and the evolution of its fracture process zone in Stanstead granite. DIC results showed that thermal gradient cracks initiated in a radial pattern from the heating source and the spatial density of the cracks was higher closer to the heating source than at the sample periphery. The macrocrac
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Noronha, Silvester J., and Heshan P. Gunawardane. "A Dislocation Simulation Approach to Physical Basis of Master Curve." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61059.

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Discrete dislocation simulations of crack-tip plasticity are used to study the sharp increase in fracture toughness around ductile-brittle transition temperature of ferritic steels. The model used composed of a macrocrack with a microcrack ahead of it in its crack plane. The microcrack represents potential fracture sites at internal inhomogenities, such as brittle precipitates. The simulation has two stages: at first the fracture stress of microcrack, σF is calculated from dislocation simulation of microcrack-tip plasticity. In the next stage the fracture toughness is estimated by the macrocra
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Cochran, Kristine B., Marjorie Erickson, Paul T. Williams, Hilda B. Klasky, and B. Richard Bass. "A Dislocation-Based Cleavage Initiation Model for Pressure Vessel Steels." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78564.

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Efforts are under way to develop a theoretical, multi-scale model for the prediction of fracture toughness of ferritic steels in the ductile-to-brittle transition temperature (DBTT) region that accounts for temperature, irradiation, strain rate, and material condition (chemistry and heat treatment) effects. This new model is intended to address difficulties associated with existing empirically-derived models of the DBTT region that cannot be extrapolated to conditions for which data are unavailable. Dislocation distribution equations, derived from the theories of Yokobori et al., are incorpora
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Tricoire, A., M. Vardelle, P. Fauchais, F. Braillard, A. Malié, and P. Bengtsson. "New Concepts for Plasma Sprayed Zirconia TBCs for Aeronautical Applications." In ITSC2005, edited by E. Lugscheider. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2005. http://dx.doi.org/10.31399/asm.cp.itsc2005p0924.

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Abstract The aim of this work, devoted to yttria stabilised zirconia (YSZ) thermal barrier coatings, is to produce by DC plasma spraying a single thick pass macro cracked orthogonally to the substrate. YSZ was plasma sprayed in air atmosphere on Hastelloy X substrates, with a NiCrAlY bond coat. A three-zone microstructure is observed, where lamellae and columns are present. The measurements of deposition stresses during spraying allow explaining the macrocrack formation.
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Rossi, Pierre, and Jean-Louis Tailhan. "Macrocrack Propagation in a Concrete Specimen Subjected to a Sustained Loading: Influence of Tensile Creep." In Ninth International Conference on Creep, Shrinkage, and Durability Mechanics (CONCREEP-9). American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784413111.039.

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Noronha, Silvester J. "A New Rationale for Scatter in Fracture Toughness Measurements." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61058.

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The observed scatter in fracture toughness is investigated based on a dislocation simulation model that has been proposed to predict the brittle ductile transition in ferritic steels. We carried out a series of Monte-Carlo simulations using uniform distribution of microcracks on the crack plane of macrocrack. Detailed statistical analysis of the simulation results showed that the fracture is always initiated at one of the largest microcracks, whose size correspond to the tail of the size distribution function, and the inherent scatter arises from the distribution in the size of the critical mi
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Drumond, Geovana, Bianca Pinheiro, Ilson Pasqualino, Francine Roudet, Didier Chicot, and Xavier Decoopman. "High Cycle Fatigue Damage Evaluation of Steel Pipelines Based on Microhardness Changes During Cyclic Loads." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-62677.

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Fatigue is a major cause of failures concerning metal structures, being capable of causing catastrophic damage to the environment and considerable financial loss. Steel pipelines used in oil and gas industry for hydrocarbon transportation, for instance, are submitted to the action of cyclic loads, being susceptible to undergo fatigue failures. The phenomenon of metal fatigue is a complex process comprising different successive mechanisms. In general, four stages can be identified, representing microcrack initiation (nucleation), microcracking, macrocrack propagation, and final fracture. Fatigu
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Bazˇant, Zdeneˇk P., Jia-Liang Le, Ferhun C. Caner, and Qiang Yu. "Size Effect on Strength of Bi-Material Joints of Steel With Fiber-Polymer Composite." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-69229.

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Metal-composite joints between steel ribs and advanced fiber-polymer composites are an effective structural system for hybrid ship hulls. Similar joints are of interest for fuel-efficient aircraft. The current designs of such joints are generally based on the strength criterion, which ignores fracture mechanics. Aimed at an efficient and reliable design, this study investigates the size effect on the strength of these joints theoretically, numerically and experimentally. The analytical formulation of the size effect is asymptotically anchored at the large-size limit in linear elastic fracture
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Pinheiro, Bianca, Jacky Lesage, Ilson Pasqualino, Noureddine Benseddiq, and Edoardo Bemporad. "X-Ray Diffraction Study of Microstructural Changes During Fatigue Damage in Steel Pipelines." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83397.

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Steel pipes used for oil and gas exploitation undergo the action of cyclic loads that can cause their failure by fatigue. A consistent evaluation of the fatigue behavior should take into account the micromechanisms of fatigue damage initiation, which precede macroscopic cracking and macrocrack propagation. In this work, microstructural changes in terms of variations in microdeformations and residual stresses (macrostresses) are evaluated by X-ray diffraction in real time during alternating bending fatigue tests performed on samples taken from an API 5L X60 grade steel pipe. Three stages of mic
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