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In the present study, the wear behaviour of two aluminium alloys (AA-5754 and AA-5083) is analysed where these have been previously processed by severe plastic deformation (SPD) with equal channel angular pressing (ECAP). In order to achieve the objectives of this study, several disks made of these alloys are manufactured by isothermal forging from different initial states. The microstructures of the initial materials analysed in this study have different accumulated deformation levels. In order to compare the properties of the nanostructured materials with those which have not been ECAP-processed, several disks with a height of 6 mm and a diameter of 35 mm are manufactured from both aluminium alloys (that is, AA-5754 and AA-5083) isothermally forged at temperatures of 150 and 200 °C, respectively. These thus-manufactured disks are tested under a load of 0.6 kN, which is equivalent to a stress mean value of 18 MPa, and at a rotational speed of 200 rpm. In order to determine the wear values, the disks are weighed at the beginning, at 10,000 revolutions, at 50,000 revolutions and at 100,000 revolutions, and then the volume-loss values are calculated. This study was carried out using specific equipment, which may be considered to have a block-on-ring configuration, developed for testing in-service wear behaviour of mechanical components. From this, the wear coefficients for the two materials at different initial states are obtained. In addition, a comparison is made between the behaviour of the previously ECAP-processed aluminium alloys and those that are non-ECAP-processed. A methodology is proposed to determine wear coefficients for the aluminium alloys under consideration, which may be used to predict the wear behaviour. It is demonstrated that AA-5754 and AA-5083 aluminium alloys improve wear behaviour after the ECAP process compared to that obtained in non-ECAP-processed materials.
Carmelo J. Luis Pérez; Rodrigo Luri Irigoyen; Ignacio Puertas Arbizu; Daniel Salcedo Pérez; Javier León Iriarte; Juan P. Fuertes Bonel. Analysis of Tribological Properties in Disks of AA-5754 and AA-5083 Aluminium Alloys Previously Processed by Equal Channel Angular Pressing and Isothermally Forged. Metals 2020, 10, 938 .
AMA StyleCarmelo J. Luis Pérez, Rodrigo Luri Irigoyen, Ignacio Puertas Arbizu, Daniel Salcedo Pérez, Javier León Iriarte, Juan P. Fuertes Bonel. Analysis of Tribological Properties in Disks of AA-5754 and AA-5083 Aluminium Alloys Previously Processed by Equal Channel Angular Pressing and Isothermally Forged. Metals. 2020; 10 (7):938.
Chicago/Turabian StyleCarmelo J. Luis Pérez; Rodrigo Luri Irigoyen; Ignacio Puertas Arbizu; Daniel Salcedo Pérez; Javier León Iriarte; Juan P. Fuertes Bonel. 2020. "Analysis of Tribological Properties in Disks of AA-5754 and AA-5083 Aluminium Alloys Previously Processed by Equal Channel Angular Pressing and Isothermally Forged." Metals 10, no. 7: 938.
Severe plastic deformation (SPD) processes have attracted a great deal of both scientific and technological interest over the last few years as a consequence of the improvements that are possible to obtain in the microstructure and mechanical properties of the materials manufactured through the use of these kind of processes. However, the practical applications of such materials to obtain mechanical components are significantly fewer. As a direct consequence, the same thing has been observed in the development of studies that show the in-service behaviour of the mechanical components developed in this way. Since one of the industrial objectives of these SPD processes is to obtain functional parts, it is necessary to carry out studies to fill this gap. Therefore, in this study, an analysis of the wear that cams undergo when manufactured from an AA5083 aluminium-magnesium alloy is carried out. The cams were isothermally-forged from materials with and without previous SPD processing by equal channel angular pressing (ECAP). Subsequently, the wear behaviour of these cams was analysed by using specific equipment, which may have been considered to have a block-on-ring configuration, developed for testing in-service wear behaviour of mechanical parts. From this comparative wear study with cams, it is shown that previously-processed materials by ECAP have a better wear performance. Moreover, finite element modelling (FEM) simulations were also included to predict wear in the cams processed in this way. A good agreement between FEM and experimental results was obtained. It is this aspect of performing the wear tests on functional and real mechanical components, and not on laboratory samples, which makes this present research work novel.
C. J. Luis Pérez; R. Luri Irigoyen; J. P. Fuertes Bonel; J. León Iriarte; D. Salcedo Pérez; I. Puertas Arbizu. Experimental and FEM Analysis of Wear Behaviour in AA5083 Ultrafine-Grained Cams. Metals 2020, 10, 479 .
AMA StyleC. J. Luis Pérez, R. Luri Irigoyen, J. P. Fuertes Bonel, J. León Iriarte, D. Salcedo Pérez, I. Puertas Arbizu. Experimental and FEM Analysis of Wear Behaviour in AA5083 Ultrafine-Grained Cams. Metals. 2020; 10 (4):479.
Chicago/Turabian StyleC. J. Luis Pérez; R. Luri Irigoyen; J. P. Fuertes Bonel; J. León Iriarte; D. Salcedo Pérez; I. Puertas Arbizu. 2020. "Experimental and FEM Analysis of Wear Behaviour in AA5083 Ultrafine-Grained Cams." Metals 10, no. 4: 479.
Over the last few years there has been an increasing interest in the study and development of processes that make it possible to obtain ultra-fine grained materials. Although there exists a large number of published works related to the improvement of the mechanical properties in these materials, there are only a few studies that analyse their in-service behaviour (fatigue and wear). In order to bridge the gap, in this present work, the fatigue and wear results obtained for connecting rods manufactured by using two different aluminium alloys (AA5754 and AA5083) previously deformed by severe plastic deformation (SPD), using Equal Channel Angular Pressing (ECAP), in order to obtain the ultrafine grain size in the processed materials are shown. For both aluminium alloys, two initial states were studied: annealed and ECAPed. The connecting rods were manufactured from the previously processed materials by using isothermal forging. Fatigue and wear experiments were carried out in order to characterize the in-service behaviour of the components. A comparative study of the results was made for both initial states of the materials. Furthermore, Finite Element Modelling (FEM) simulations were used in order to compare experimental results with those obtained from simulations. In addition, dimensional wear coefficients were found for each of the aluminium alloys and initial deformation states. This research work aims to progress the knowledge of the behaviour of components manufactured from ultrafine grain materials.
Rodrigo Luri; Carmelo J. Luis; Javier León; Juan P. Fuertes; Daniel Salcedo; Ignacio Puertas. Analysis of Fatigue and Wear Behaviour in Ultrafine Grained Connecting Rods. Metals 2017, 7, 289 .
AMA StyleRodrigo Luri, Carmelo J. Luis, Javier León, Juan P. Fuertes, Daniel Salcedo, Ignacio Puertas. Analysis of Fatigue and Wear Behaviour in Ultrafine Grained Connecting Rods. Metals. 2017; 7 (8):289.
Chicago/Turabian StyleRodrigo Luri; Carmelo J. Luis; Javier León; Juan P. Fuertes; Daniel Salcedo; Ignacio Puertas. 2017. "Analysis of Fatigue and Wear Behaviour in Ultrafine Grained Connecting Rods." Metals 7, no. 8: 289.
This present research work deals with the development of ultrafine grained cams obtained from previously ECAP (Equal Channel Angular Pressing)-processed material and manufactured by isothermal forging. The design and the manufacturing of the dies required for the isothermal forging of the cams are shown. Optimization techniques based on the combination of design of experiments, finite element and finite volume simulations are employed to develop the dies. A comparison is made between the mechanical properties obtained with the cams manufactured from material with no previous deformation and with those from previously SPD (Severe Plastic Deformation)-processed material. In addition, a comparative study between the experimental results and those obtained from the simulations is carried out. It has been demonstrated that it is possible to obtain ultrafine grained cams with an increase of 10.3% in the microhardness mean value as compared to that obtained from material with no previous deformation.
Daniel Salcedo; Carmelo J. Luis; Rodrigo Luri; Ignacio Puertas; Javier León; Juan P. Fuertes. Design and Mechanical Properties Analysis of AA5083 Ultrafine Grained Cams. Metals 2017, 7, 116 .
AMA StyleDaniel Salcedo, Carmelo J. Luis, Rodrigo Luri, Ignacio Puertas, Javier León, Juan P. Fuertes. Design and Mechanical Properties Analysis of AA5083 Ultrafine Grained Cams. Metals. 2017; 7 (4):116.
Chicago/Turabian StyleDaniel Salcedo; Carmelo J. Luis; Rodrigo Luri; Ignacio Puertas; Javier León; Juan P. Fuertes. 2017. "Design and Mechanical Properties Analysis of AA5083 Ultrafine Grained Cams." Metals 7, no. 4: 116.
The most important difficulties when the behaviour of a part that is subjected to external mechanical forces is simulated deal with the determination of both the material thermo-mechanical properties and its boundary conditions. The accuracy of the results obtained from the simulation is directly related to the knowledge of the flow stress curve. Therefore, the determination of a material flow rule which is valid for both a wide temperature range and different initial deformation conditions in the starting material presents a great deal of interest when simulation results close to the experimental values are required to be obtained. In this present study, a novel flow stress curve is proposed that is able to accurately predict the behaviour of both materials with no previous accumulated strain and materials that have been previously subjected to severe plastic deformation processes. Moreover, it is possible to use it both for hot and cold working. The results are analysed in a wide test temperature range, which varies from room temperature to 300 °C, and from material previously processed by angular channel extrusion or with no previous strain accumulated. It is shown that the flow rule proposed is effective to model the material behaviour in a wide temperature range and it makes it possible to take the recrystallization phenomena that appear in previously deformed materials into account. In addition, the results obtained are compared with those predicted by other flow rules that exist in the prior literature. Furthermore, the study is complemented with finite element simulations and with a comparison between simulation and experimental results.
Javier León; Carmelo J. Luis; Juan P. Fuertes; Ignacio Puertas; Rodrigo Luri; Daniel Salcedo. A Proposal of a Constitutive Description for Aluminium Alloys in Both Cold and Hot Working. Metals 2016, 6, 244 .
AMA StyleJavier León, Carmelo J. Luis, Juan P. Fuertes, Ignacio Puertas, Rodrigo Luri, Daniel Salcedo. A Proposal of a Constitutive Description for Aluminium Alloys in Both Cold and Hot Working. Metals. 2016; 6 (10):244.
Chicago/Turabian StyleJavier León; Carmelo J. Luis; Juan P. Fuertes; Ignacio Puertas; Rodrigo Luri; Daniel Salcedo. 2016. "A Proposal of a Constitutive Description for Aluminium Alloys in Both Cold and Hot Working." Metals 6, no. 10: 244.
Over these last few years, there has been a growing interest in developing mechanical components from submicrometric materials due to the significant improvement that these materials present compared to their original state. This present research work deals with the study of the mechanical properties of a connecting rod isothermally forged from different starting materials. These materials are as follows: annealed aluminum alloy (AA) 5754, the same alloy previously deformed through equal channel angular pressing (ECAP) and a third case where the previously ECAP-processed material is subjected to a recovery heat treatment. A comparison is made between finite volume (FV) simulations and experimental tests with respect to hardness, plastic strain and forging force. Furthermore, the improvement in the mechanical properties of the connecting rod forged from predeformed material is evaluated in comparison to the connecting rod forged with annealed material. The microstructure of both cases is also compared at the end of the manufacturing process.
Javier León; Daniel Salcedo; Óscar Murillo; Carmelo J. Luis; Juan P. Fuertes; Ignacio Puertas; Rodrigo Luri. Mechanical Properties Analysis of an Al-Mg Alloy Connecting Rod with Submicrometric Structure. Metals 2015, 5, 1397 -1413.
AMA StyleJavier León, Daniel Salcedo, Óscar Murillo, Carmelo J. Luis, Juan P. Fuertes, Ignacio Puertas, Rodrigo Luri. Mechanical Properties Analysis of an Al-Mg Alloy Connecting Rod with Submicrometric Structure. Metals. 2015; 5 (3):1397-1413.
Chicago/Turabian StyleJavier León; Daniel Salcedo; Óscar Murillo; Carmelo J. Luis; Juan P. Fuertes; Ignacio Puertas; Rodrigo Luri. 2015. "Mechanical Properties Analysis of an Al-Mg Alloy Connecting Rod with Submicrometric Structure." Metals 5, no. 3: 1397-1413.
In the last years, new severe plastic deformation (SPD) processes have been developed in order to produce very high values of deformation in the materials to be processed, with only small changes in the size of parts. This is not possible through conventional thermo-mechanical processes, in which the increase up to the above-mentioned values of deformation is usually associated with a change in their geometry. As is well-known, with enough accumulation of plastic deformation, a new submicrometric or even nanometric grain structure substitutes the former. Given that the grain size in metallic materials has a great deal of influence on their mechanical properties, the refinement of this grain size provides enormous technological advantages. For instance, at low values of temperature, a fine grain size can increase mechanical strength, hardness, fracture toughness and the material fatigue limit. Furthermore, at high values of temperature, the alloys with an ultrafine grain size may exhibit a superplastic behaviour and thus, the ability to undergo very high values of deformation with no damage to the material. The continuous combined drawing process in angular channels (CCDR) is a new concept of severe plastic deformation process (SPD), developed by researchers belonging to the Public University of Navarre and based on the patent (ES 2224787). In the present work, finite element analysis will be employed in order to study not only the strain distribution in the processed materials but also the homogeneity of the introduced strain. Moreover, experimental results will be compared to that obtained by using FEM. With the present work, it will be shown that it is feasible to achieve a process with possible industrial application, making the continuous processing of metallic materials in angular channels by SPD possible.
C. J. Luis; D. Salcedo; R. Luri; J. León; I. Puertas. FEM Modelling of the Continuous Combined Drawing and Rolling Process for Severe Plastic Deformation of Metallic Materials. Advanced Structured Materials 2014, 17 -45.
AMA StyleC. J. Luis, D. Salcedo, R. Luri, J. León, I. Puertas. FEM Modelling of the Continuous Combined Drawing and Rolling Process for Severe Plastic Deformation of Metallic Materials. Advanced Structured Materials. 2014; ():17-45.
Chicago/Turabian StyleC. J. Luis; D. Salcedo; R. Luri; J. León; I. Puertas. 2014. "FEM Modelling of the Continuous Combined Drawing and Rolling Process for Severe Plastic Deformation of Metallic Materials." Advanced Structured Materials , no. : 17-45.
Daniel Salcedo; Carmelo J. Luis; Ignacio Puertas; Javier León; Rodrigo Luri; Juan Pablo Fuertes. FEM Modelling and Experimental Analysis of an AA5083 Turbine Blade from ECAP Processed Material. Materials and Manufacturing Processes 2014, 29, 434 -441.
AMA StyleDaniel Salcedo, Carmelo J. Luis, Ignacio Puertas, Javier León, Rodrigo Luri, Juan Pablo Fuertes. FEM Modelling and Experimental Analysis of an AA5083 Turbine Blade from ECAP Processed Material. Materials and Manufacturing Processes. 2014; 29 (4):434-441.
Chicago/Turabian StyleDaniel Salcedo; Carmelo J. Luis; Ignacio Puertas; Javier León; Rodrigo Luri; Juan Pablo Fuertes. 2014. "FEM Modelling and Experimental Analysis of an AA5083 Turbine Blade from ECAP Processed Material." Materials and Manufacturing Processes 29, no. 4: 434-441.
Over these past few years, there have been a large number of technical papers published related to the problem of improving the mechanical properties of materials obtained through severe plastic deformation. Nevertheless, the number of technical papers dealing with improvement in the mechanical properties of mechanical components manufactured from submicrometric grain size material has not been so proficient. Therefore, in this present research work, a straight blade has been manufactured starting from AA-5083 previously processed by ECAE twice (N2) with route C. This material will be manipulated so as to be isothermally forged at different temperature values. This present research work shows the results that are inherent in an improvement in the mechanical properties and the microstructure achieved in the thus obtained components, compared with the starting material. In addition, the optimum forging temperature to achieve these components will be determined. As shown in this research work, it is possible to obtain submicrometric grain size mechanical components with a higher mechanical strength than those obtained in nonultrafine grained materials. The originality of this research work lies in the manufacturing of actual mechanical components from ECAE processed material and the analysis of their properties.
Daniel Salcedo; Carmelo Luis; Ignacio Puertas; Javier León; Juan Pablo Fuertes; Rodrigo Luri. Analysis on the Manufacturing of an AA5083 Straight Blade Previously ECAE Processed. Advances in Materials Science and Engineering 2013, 2013, 1 -7.
AMA StyleDaniel Salcedo, Carmelo Luis, Ignacio Puertas, Javier León, Juan Pablo Fuertes, Rodrigo Luri. Analysis on the Manufacturing of an AA5083 Straight Blade Previously ECAE Processed. Advances in Materials Science and Engineering. 2013; 2013 ():1-7.
Chicago/Turabian StyleDaniel Salcedo; Carmelo Luis; Ignacio Puertas; Javier León; Juan Pablo Fuertes; Rodrigo Luri. 2013. "Analysis on the Manufacturing of an AA5083 Straight Blade Previously ECAE Processed." Advances in Materials Science and Engineering 2013, no. : 1-7.
In this present study, both the design and the optimal manufacturing conditions for processing a straight blade by isothermal forging are shown. The starting material has been previously deformed by a severe plastic deformation (SPD) process known as equal channel angular extrusion (ECAE). As is well-known, the ECAE process is a technology which allows us to obtain materials with sub-micrometric grain size. These nanostructured materials can be employed afterwards as initial materials for other manufacturing processes. The use of these ultra fine grain sized materials (UFG) provides improved mechanical properties such as: greater hardness and mechanical strength, among others. In this present study, FEM simulations of the isothermal forging of an AA5083 previously deformed by ECAE will be carried out. The total equivalent plastic strain, the damage and the forces required to carry out the isothermal forging of this nanostructured aluminium alloy will be determined.
Daniel Salcedo; Carmelo J. Luis; Rodrigo Luri; Javier León; Ignacio Puertas; Juan Pablo Fuertes; Eduardo Morquecho. Finite element modelling and experimental analysis of the processing conditions for obtaining straight blades by isothermal forging of a nanostructured aluminium-magnesium alloy. International Journal of Materials and Product Technology 2013, 47, 63 .
AMA StyleDaniel Salcedo, Carmelo J. Luis, Rodrigo Luri, Javier León, Ignacio Puertas, Juan Pablo Fuertes, Eduardo Morquecho. Finite element modelling and experimental analysis of the processing conditions for obtaining straight blades by isothermal forging of a nanostructured aluminium-magnesium alloy. International Journal of Materials and Product Technology. 2013; 47 (1/2/3/4):63.
Chicago/Turabian StyleDaniel Salcedo; Carmelo J. Luis; Rodrigo Luri; Javier León; Ignacio Puertas; Juan Pablo Fuertes; Eduardo Morquecho. 2013. "Finite element modelling and experimental analysis of the processing conditions for obtaining straight blades by isothermal forging of a nanostructured aluminium-magnesium alloy." International Journal of Materials and Product Technology 47, no. 1/2/3/4: 63.
Equal channel angular drawing (ECAD) process is an innovative method for manufacturing high resistance wires. The aim of this process is to introduce plastic strain in the processed materials in order to obtain high resistance wires as a consequence of the strain-hardening behaviour. This process can be compared with traditional wire-drawing due to the similar profile of plastic strain achieved in the processed material. With both processes, more deformation is achieved at the perimeter of the wire than in the centre. Nevertheless, the main difference between both processes is that, for the same cross-section reduction, the ECAD process is able to produce more plastic strain in the material than that obtained by using wire-drawing processes. This study will show the distribution of total equivalent plastic strain in each of the four passages with route B that the material is going to undergo as well as in the final calibration passage. This will be calculated using the FEM software MSC Marc Mentat
Javier Leon; Carmelo J. Luis; Rodrigo Luri; Ignacio Puertas. A study on equal channel angular drawing (ECAD) of AA-1370 processed by route B. International Journal of Mechatronics and Manufacturing Systems 2010, 3, 368 .
AMA StyleJavier Leon, Carmelo J. Luis, Rodrigo Luri, Ignacio Puertas. A study on equal channel angular drawing (ECAD) of AA-1370 processed by route B. International Journal of Mechatronics and Manufacturing Systems. 2010; 3 (5/6):368.
Chicago/Turabian StyleJavier Leon; Carmelo J. Luis; Rodrigo Luri; Ignacio Puertas. 2010. "A study on equal channel angular drawing (ECAD) of AA-1370 processed by route B." International Journal of Mechatronics and Manufacturing Systems 3, no. 5/6: 368.
As is well-known, teaching of the computer-aided technologies is gaining more and more importance in the field of Manufacturing Processes Engineering. One such example is the growing tendency to employ computers in the simulation of material removal processes (CAM). In this study, a methodology proposed by the Manufacturing Processes Engineering Section in order to teach material removal processes is shown. This methodology is put into practice by employing one CAM software such as Surfcam® and is applied to the teaching subjects given by the previously-mentioned Section belonging to the Public University of Navarre. Due to the length of the practice manual developed for this purpose, which covers turning, milling and EDM processes, the present work has only been focused on the use of Surfcam® in the first case.
C.J. Luis-Pérez; Ignacio Puertas; C. Remirez; Javier León; Rodrigo Luri. Methodology for Teaching the Material Removal Processes by Using CAD/CAM Software: Turning Processes. Materials Science Forum 2009, 625, 67 -75.
AMA StyleC.J. Luis-Pérez, Ignacio Puertas, C. Remirez, Javier León, Rodrigo Luri. Methodology for Teaching the Material Removal Processes by Using CAD/CAM Software: Turning Processes. Materials Science Forum. 2009; 625 ():67-75.
Chicago/Turabian StyleC.J. Luis-Pérez; Ignacio Puertas; C. Remirez; Javier León; Rodrigo Luri. 2009. "Methodology for Teaching the Material Removal Processes by Using CAD/CAM Software: Turning Processes." Materials Science Forum 625, no. : 67-75.