Exploració per autor "Roa Rovira, Joan Josep"
Ara es mostren els items 46-65 de 185
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Effect of laser surface texturing on Schmid factor and plastic deformation mechanisms on AISI 301LN steel
Rezayat, Mohammad; Roa Rovira, Joan Josep; Mateo García, Antonio Manuel (Multidisciplinary Digital Publishing Institute (MDPI), 2023-10-23)
Article
Accés obertIn this comprehensive study, the multifaceted impact of laser surface texturing (LST) on AISI 301LN stainless steel is explored. Changes in the microstructure, mechanical properties, and grain characteristics are examined. ... -
Effect of nanosecond laser texturing on the topography, low-temperature degradation behaviour and biological performance of 3Y-TZP
García de Albéniz López de Aberasturi, Nerea; Jiménez Piqué, Emilio; Roa Rovira, Joan Josep; Mas Moruno, Carlos (Universitat Politècnica de Catalunya, 2022-06-16)
Comunicació de congrés
Accés obert -
Effect of shot peening on metastable austenitic stainless steels
Fargas Ribas, Gemma; Roa Rovira, Joan Josep; Mateo García, Antonio Manuel (2015-08-12)
Article
Accés obertIn this work, shot peening was performed in a metastable austenitic stainless steel EN 1.4318 (AISI 301LN) in order to evaluate its effect on austenite to martensite phase transformation and also the influence on the fatigue ... -
Effect of the filler on the nanomechanical properties of polypropylene in contact with paraffinic phase change material
Giró Paloma, Jessica; Rayón Encinas, Emilio; Roa Rovira, Joan Josep; Martínez López, Monica; Fernández Renna, Ana Inés (2015-02)
Article
Accés obertAs the changes on the mechanical properties with depth of indentation provide valuable information that may be suitable for design purposes, nanoindentation is an adequate technique for investigating the nanomechanical ... -
Effect of Y2O3 content on rheology, hardness and fracture toughness of 3D printing zirconia-base ceramic materials
Yarahmadi, Mona; Roa Rovira, Joan Josep; Cabezas, L.; Llanes Pitarch, Luis Miguel; Fargas Ribas, Gemma (Universitat Politècnica de Catalunya, 2022-06-16)
Comunicació de congrés
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Effective silver assited welding of YBCO blocks: mechanical versus electrical properties
Bartolomé, E.; Roa Rovira, Joan Josep; Bozzo, Bernat; Segarra, M.; Granados García, Javier A.J. (2010-04-05)
Article
Accés obertSuperconducting welding of bulk YBCO is a key technology allowing the fabrication of large, complex-shaped pieces for applications such as levitation, bearings or large magnets. Ideally, the electrical and mechanical ... -
Effectiveness of direct laser interference patterning and peptide immobilization on endothelial cell migration for cardio-vascular applications: an in vitro study
Schieber, Romain; Mas Moruno, Carlos; Lasserre, Federico; Roa Rovira, Joan Josep; Ginebra Molins, Maria Pau; Mücklich, Frank T.; Pegueroles Neyra, Marta (2022-04-01)
Article
Accés obert
Realitzat a/amb: Universität des Saarlandes / Institut de Bioenginyeria de CatalunyaEndothelial coverage of an exposed cardiovascular stent surface leads to the occurrence of restenosis and late-stent thrombosis several months after implantation. To overcome this difficulty, modification of stent surfaces ... -
Electrical and mechanical characterization by Instrumented Indentation technique of La0.85Sr0.15Ga0.8Mg0.2O3-d electrolytes for SOFCs
Morales Comas, Miguel; Roa Rovira, Joan Josep; Perez Falcon, J. M.; Moure, A.; Tartaj, J.; Segarra, M. (Elsevier, 2012-11-15)
Article
Accés restringit per política de l'editorialLa0.85Sr0.15Ga0.8Mg0.2O3−δ pellets obtained by the polymeric organic complex solution method, isostatic pressing and sintering at 1350 °C have been electrical and mechanically studied. Electrical measurements evidenced ... -
ElectroCatalytic Activity of Nickel Foam with Co, Mo, and Ni Phosphide Nanostructures
Rezayat, Mohammad; Yazdi, Morteza Saghafi; Roa Rovira, Joan Josep (MDPI AG, 2022-04-27)
Article
Accés obertIn this study, the electrocatalytic activity of nickel foam, which is activated by cobalt, molybdenum, and nickel phosphide nanostructures, is prepared by the plasma hydrothermal method for use in the release of hydrogen ... -
Enhanced osteoconductivity on electrically charged titanium implants treated by physicochemical surface modifications methods
Fernández Yagüe, Marc-Antoni; Pérez Antoñanzas, Román; Roa Rovira, Joan Josep; Biggs, Manus; Gil Mur, Francisco Javier; Pegueroles Neyra, Marta (2019-06-01)
Article
Accés obertBiomimetic design is a key tenet of orthopedic device technology, and in particular the development of responsive surfaces that promote ion exchange with interfacing tissues, facilitating the ionic events that occur naturally ... -
Enhanced thermal stability and fracture toughness of TiAlN coatings by Cr, Nb and V-alloying
Chen, Yu-Hsiang; Roa Rovira, Joan Josep; Yu, C. H.; Johansson Joesaar, M.P; Andersson, J. M.; Anglada Gomila, Marcos Juan; Odén, Magnus; Rogstrom, Lina (Elsevier, 2018-05-25)
Article
Accés obertThe effect of metal alloying on mechanical properties including hardness and fracture toughness were investigated in three alloys, Ti~0.33Al0.50(Me)~0.17N (Me¿=¿Cr, Nb and V), and compared to Ti0.50Al0.50N, in the as-deposited ... -
Estudio de los mecanismos de deformación plástica inducidos por nanoindentación en materiales superconductores de YBCO
Roa Rovira, Joan Josep; Tromas, Christophe; Jiménez Piqué, Emilio; MARTÍN, V; Morales Comas, Miguel; Segarra Rubi, Merce (2016)
Comunicació de congrés
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Estudio de los mecanismos de fractura durante el proceso de oxigenación del YBa2Cu3O7-d (YBCO)
Roa Rovira, Joan Josep; Capdevila, X.G.; Segarra, M. (2008)
Comunicació de congrés
Accés obertEstudio del proceso de fractura en el plano cristalográfico 001 (ab) durante el proceso de oxigenación de materiales superconductores de YBa2Cu3O7-δ (YBCO, a menudo conocido como Y123) mediante nanoindentación a ... -
Estudio del efecto del límite de grano en los mecanismos de deformación de los aceros TRIP mediante compresión de micropilares
Roa Rovira, Joan Josep; Wheeler, J.M.; Fargas Ribas, Gemma; Mateo García, Antonio Manuel (2017)
Comunicació de congrés
Accés restringit per política de l'editorialLos aceros TRIP (Transformation-Induced Plasticity) se caracterizan por presentar transformación de fase de austenita a martensita por deformación, hecho que les confiere una mayor capacidad de endurecimiento que los aceros ... -
Evaluation of the bulk and alpha-case layer properties in Ti-6Al-4V at micro- and nano-metric length scale
Sefer, Birhan; Roa Rovira, Joan Josep; Mateo García, Antonio Manuel; Pederson, Robert; Antti, Marta-Lena (WILEY, 2016)
Capítol de llibre
Accés restringit per política de l'editorialIn the present study the hardness of individual alpha ( )-Ti grains in Ti-6Al-4V was measured by nanoindentation using Berkovich tip indenter. Additionally, alpha-case layer was induced by performing isothermal heat ... -
Evolution of microstructure and residual stresses in gradually ground/polished 3Y-TZP
Minguela Díaz, Joaquim; Slawik, Sebastian; Mücklich, Frank T.; Ginebra Molins, Maria Pau; Llanes Pitarch, Luis Miguel; Mas Moruno, Carlos; Roa Rovira, Joan Josep (Elsevier, 2019-01-01)
Article
Accés obert
Realitzat a/amb: Universität des Saarlandes / Institut de Bioenginyeria de CatalunyaA comprehensive study of progressively ground/polished 3Y-TZP was performed with the aim of better understanding the mechanisms driving the microstructural modifications observed after such procedures, and identifying the ... -
Experimental analysis of manufacturing parameters’ effect on the flexural properties of wood-PLA composite parts built through FFF
Zandi, Mohammad Damous; Jerez Mesa, Ramón; Llumà Fuentes, Jordi; Roa Rovira, Joan Josep; Travieso Rodríguez, José Antonio (2020-01-02)
Article
Accés obertThis paper aims to determine the flexural stiffness and strength of a composite made of a polylactic acid reinforced with wood particles, named commercially as Timberfill, manufactured through fused filament fabrication ... -
Experimental correlation of mechanical properties of the Ti-6Al-4V alloy at different length scales
Tuninetti, Víctor; Jaramillo, Andrés F.; Riu Perdrix, Guiomar; Mateo García, Antonio Manuel; Roa Rovira, Joan Josep (Multidisciplinary Digital Publishing Institute (MDPI), 2021-01-07)
Article
Accés obertThis article focuses on a systematic study of a Ti-6Al-4V alloy in order to extensively characterize the main mechanical properties at the macro-, micro- and submicrometric length scale under different stress fields. ... -
Exploring the effects of laser surface modification on AISI 301LN steel: a micro-mechanical study
Rezayat, Mohammad; Mateo García, Antonio Manuel; Roa Rovira, Joan Josep (Multidisciplinary Digital Publishing Institute (MDPI), 2023-10-26)
Article
Accés obertThis article investigates the surface hardening capability of a metastable austenitic TRansformation Induced Plasticity (TRIP) stainless steel, particularly on AISI 301LN, by laser texturing. This technology produces ... -
Fatigue crack growth behavior of WC-Co and WC-CoNi cemented carbides
Tarragó Cifre, Jose María; Roa Rovira, Joan Josep; Valle, Vladimir; Jessica, Marshall; Mateo García, Antonio Manuel; Llanes Pitarch, Luis Miguel (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
Text en actes de congrés
Accés obertEn este trabajo se investigó el crecimiento de grietas por fatiga para diversas calidades de metal duro en función de la microestructura y el cociente de carga aplicada (R). De esta forma, se evaluó la influencia de la ...