Listar por autor "e003cda8b13e71270da5e5b71660f6a9"
Mostrando ítems 1-20 de 23
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An analytical approach to calculate stress concentration factors of machined surfaces
Perez Guisado, Ion; ARRAZOLA, PEDRO JOSE; Madariaga, Aitor; CUESTA ZABALAJAUREGUI, MIKEL; Soriano Moreno, Denis (Elsevier Ltd., 2021)Machining operations affect the properties of the final surface layer, and these can impact on its functional per- formance, particularly on fatigue behaviour. Among the properties of the machined surface, surface topography ... -
Analytical model to identify crack initiation in machined aluminium parts
Ortiz-de-Zarate, Gorka; Madariaga, Aitor; Perez Guisado, Ion; ARRAZOLA, PEDRO JOSE (Elsevier, 2024)Thin-walled aluminium components used in the structure of aircrafts are subjected to fatigue loads. Fatigue performance of those components is affected by the surface integrity generated in the last machining step. This ... -
Broaching Digital Twin to Predict Forces, Local Overloads, and Surface Topography Irregularities
Ortiz-de-Zarate, Gorka; Madariaga, Aitor; Soler Mallol, Daniel; ARRAZOLA, PEDRO JOSE (MDPI, 2024)Broaching is a key manufacturing process that directly influences the surface integrity of critical components, impacting their functional performance in sectors such as aeronautics, automotive, and energy. Such components ... -
A comparative study of residual stress profiles on Inconel 718 induced by dry face turning
Kortabarria, Aitor; Madariaga, Aitor; Fernandez, Eduardo; Esnaola, Jon Ander; ARRAZOLA, PEDRO JOSE (Elsevier, 2011)Residual stress profiles induced by different dry face turning conditions are compared employing X-ray diffraction method, Hole-Drilling method and Finite Element Modelling. It is well known that the surface integrity ... -
Depth-resolved mechanical behaviour of shot peened 7050-T7451 aluminium surfaces using in-situ synchrotron X-ray diffraction
Madariaga, Aitor (Elsevier, 2024)We have assessed the elasto-plastic (sub)surface behaviour of 7050-T7451 aluminium alloy treated by shot peening using S110 steel shots of 300 μm in diameter and two different intensities, namely Almen intensity (A) of 3.4 ... -
Effect of cutting speed on the surface integrity of face milled 7050-T7451 aluminium workpieces
Pérez Guisado, Ion; Madariaga, Aitor; ARRAZOLA, PEDRO JOSE; CUESTA ZABALAJAUREGUI, MIKEL; Garay, Ainara (Elsevier Ltd., 2018)The guarantee of surface integrity has become a primary objective for researchers when analysing the reliability of machined aircraft aluminium alloy structural parts in high-speed machining. This work studies the effect ... -
Effect of innovative finishing operations on the tribological performance of steel 27MnCr5
Madariaga, Aitor; Abedrabbo Hazbun, Anibal Faruk; Soriano Moreno, Denis; Alpizar Fernandez, Raul; ARRAZOLA, PEDRO JOSE (Elsevier Ltd., 2022)Transmission shafts used in the automotive sector must have a good tribological performance, and therefore an enhanced surface integrity. This paper aims to study the effect of eco-friendly innovative finishing operations ... -
Effect of surface integrity generated by machining on isothermal low cycle fatigue performance of Inconel 718
Madariaga, Aitor; Garay, Ainara; Esnaola, Jon Ander; ARRAZOLA, PEDRO JOSE (Elsevier Ltd., 2022)Critical aero-engine components such as turbine discs must withstand severe cyclic stresses, which can eventually lead to low cycle fatigue (LCF) failures. These components are made of difficult-to-cut alloys and machining ... -
Enhancing surface integrity of A7050-T7451 aluminium alloy by pneumatic machine hammer peening
Madariaga, Aitor; CUESTA ZABALAJAUREGUI, MIKEL; Dominguez Romero, Erika; Garay, Ainara; Ortiz-de-Zarate, Gorka; ARRAZOLA, PEDRO JOSE (Elsevier Ltd., 2022)Aerostructures withstand cyclic mechanical loads and therefore, their design must fulfil surface integrity and fatigue strength requirements. This paper studies the effect of pneumatic machine hammer peening on surface ... -
Evolution of residual stresses induced by machining in a Nickel based alloy under static loading at room temperature
Madariaga, Aitor; ARRAZOLA, PEDRO JOSE; Esnaola, Jon Ander (Elsevier, 2014)Tensile residual stresses are very often generated on the surface when machining nickel alloys. In order to determine their influence on the final mechanical behaviour of the component residual stress stability should be ... -
Experimental and FEM analysis of surface integrity when broaching Ti64
Ortiz-de-Zarate, Gorka; Madariaga, Aitor; Garay, Ainara; Azpitarte-Aranzabal, Larraitz; CUESTA ZABALAJAUREGUI, MIKEL; ARRAZOLA, PEDRO JOSE (Elsevier, 2018)The performance of aeronautic critical components is strongly dependent on its fatigue behavior, which is directly linked to their surface integrity condition. Broaching operation is a machining operation extensively used ... -
Experimental evaluation and surface integrity analysis of cryogenic coolants approaches in the cylindrical plunge grinding
Abedrabbo Hazbun, Anibal Faruk; Soriano Moreno, Denis; Madariaga, Aitor; Fernandez Manchado, Raul; ARRAZOLA, PEDRO JOSE (Nature Publishing Group, 2021)Replacement of pollutant fuids with eco-friendly strategies in machining operations signifcantly contributes to protecting the environment, diminishing global warming, and ensuring a healthier workplace for employees. This ... -
Force Prediction Methodology for Complex Shape Broaching
Ortiz-de-Zarate, Gorka; Soler Mallol, Daniel; Soriano Moreno, Denis; Madariaga, Aitor; Etxebeste , Mikel; ARRAZOLA, PEDRO JOSE (Elsevier B.V., 2023)Broaching is widely used for the manufacturing of complex geometries which requires high dimensional accuracy and surface finishing (e.g., fir tree, dovetail). A software development for force prediction in complex shape ... -
Influence of cryogenic grinding surface on fatigue performance of carburised 27MnCr5
Abedrabbo Hazbun, Anibal Faruk; Madariaga, Aitor; Soriano Moreno, Denis; Fernandez Manchado, Raul; ARRAZOLA, PEDRO JOSE (Elsevier, 2023)Automotive transmission components are subjected to cyclic loads and, thus, must have a reliable fatigue performance. Since fatigue cracks nucleate at the surface, it is necessary to guarantee that its surface integrity ... -
Influence of tool wear on residual stresses when turning Inconel 718
Madariaga, Aitor; Kortabarria, Aitor; Hormaetxe Fernández, Exabier; Garay, Ainara; ARRAZOLA, PEDRO JOSE (Elsevier, 2016)This paper analyzes the effect of tool wear on residual stresses when turning. Inconel 718 discs were machined for prolonged periods at several cutting speeds, feed-rates and depth of cut. Tests were interrupted to measure ... -
Mechanical Properties and Fatigue Performance of 17-4 PH Stainless Steel Manufactured by Atomic Diffusion Additive Manufacturing Technology
Rodríguez Cuadrado, Jon; Zuriarrain Berasategui, Aitor; Madariaga, Aitor; ARRAZOLA, PEDRO JOSE; Fraile, Itziar; Fraile, Itziar; Soler Mallol, Daniel (MDPI, 2023)Additive Manufacturing (AM) is gaining importance as an alternative and complementary technology to conventional manufacturing processes. Among AM technologies, the Atomic Diffusion Additive Manufacturing (ADAM) technology ... -
Non-destructive procedure to determine residual stresses and white layers in hole making operations
Madariaga, Aitor; Ortiz-de-Zarate, Gorka; ARRAZOLA, PEDRO JOSE (Elsevier, 2025)Holes are one of the most critical features of aero-engine components subjected to fatigue loads. Thus, it is essential to ensure a good surface integrity during hole making operations. This work proposes a non-destructive ... -
A novel methodology to characterize tool-chip contact in metal cutting using partially restricted contact length tools
Ortiz-de-Zarate, Gorka; Madariaga, Aitor; ARRAZOLA, PEDRO JOSE (2021)A novel methodology to map the friction and normal stress distribution on the rake face using Partially Restricted Contact Length Tools in orthogonal cutting tests is proposed. The influence of cutting speed, feed and ... -
Reduction of distortions in large aluminium parts by controlling machining-induced residual stresses
Madariaga, Aitor; ARRAZOLA, PEDRO JOSE (Springer, 2018)Large aluminium monolithic parts used in the aeronautic industry frequently show significant geometric distortions after the machining process. These distortions are the consequence of the initial residual stresses of the ... -
Sensitivity analysis of the input parameters of a physical based ductile failure model of Ti-6Al-4V for the prediction of surface integrity
Ortiz-de-Zarate, Gorka; Sela, Andrés; Madariaga, Aitor; ARRAZOLA, PEDRO JOSE (Elsevier Ltd, 2020)In machining of Ti-6Al-4V, it is commonly reported the appearance of segmented chip produced by adiabatic shearing (at high cutting speeds) and lack of ductility (at low cutting speeds). Moreover, machining is a manufacturing ...
