Exploració per autor "Roa Rovira, Joan Josep"
Ara es mostren els items 80-99 de 185
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Implementation of advanced characterization techniques for assessment of grinding effects on the surface integrity of WC-Co cemened carbides
Yang, Jing; Roa Rovira, Joan Josep; Schwind, Martin; Odén, Magnus; Johansson Joesaar, M.P; Esteve, Joan; Llanes Pitarch, Luis Miguel (2018)
Article
Accés obertGrinding is a key step on the manufacturing process of WC–Co cemented carbides (hardmetals). In this work, an investigation of grinding effects on the surface integrity of hardmetals is conducted. It is done by combining ... -
Implementation of advanced characterization techniques for assessment of grinding effects on the surface integrity of WC-Co cemented carbides
Yang, Jing; Roa Rovira, Joan Josep; Schwind, Martin; Odén, Magnus; Johansson-Jõesaar, M.P.; Esteve, Joan; Llanes Pitarch, Luis Miguel (2018-02-21)
Article
Accés restringit per política de l'editorialGrinding is a key step on the manufacturing process of WC–Co cemented carbides (hardmetals). In this work, an investigation of grinding effects on the surface integrity of hardmetals is conducted. It is done by combining ... -
Influence of cyclic thermal treatments on the oxidation behavior of Ti-6Al- 2Sn-4Zr-2Mo alloy
Fargas Ribas, Gemma; Roa Rovira, Joan Josep; Sefer, B.; Mateo García, Antonio Manuel (2018-11-01)
Article
Accés restringit per política de l'editorialTi-6Al-2Sn-4Zr-2Mo is one of the most common titanium alloys for aerospace industry. This alloy experiences oxidation phenomenon at elevated temperatures. In the present study, cyclic thermal treatments were performed in ... -
Influence of cyclic thermal treatments on the oxidation behavior of Ti-6Al-2Sn-4Zr-2Mo alloy
Fargas Ribas, Gemma; Roa Rovira, Joan Josep; Sefer, Birhan; Mateo García, Antonio Manuel (2018-11-01)
Article
Accés obertTi-6Al-2Sn-4Zr-2Mo is one of the most common titanium alloys for aerospace industry. This alloy experiences oxidation phenomenon at elevated temperatures. In the present study, cyclic thermal treatments were performed in ... -
Influence of different shaping and finishing processes on the surface integrity of WC-Co cemented carbides
Riu Perdrix, Guiomar; Slawik, Sebastian; Mücklich, Frank; Llanes Pitarch, Luis Miguel; Roa Rovira, Joan Josep (Multidisciplinary Digital Publishing Institute (MDPI), 2023-12-30)
Article
Accés obertInvestigation of four different surface-shaping and finishing sequences is carried out on the surface integrity of a WC-10Co hardmetal grade. The surface conditions include grinding, electrical discharge machining and ... -
Influence of grinding/polishing on the mechanical, phase stability and cell adhesion properties of yttria-stabilized zirconia
Minguela Díaz, Joaquim; Ginebra Molins, Maria Pau; Llanes Pitarch, Luis Miguel; Mas Moruno, Carlos; Roa Rovira, Joan Josep (Elsevier, 2020-09)
Article
Accés obertThe changes in mechanical properties, hydrothermal degradation and cell adhesion were studied in 3Y-TZP under two different superficial modification patterns (uni- and multidirectional) with a surface roughness ranging ... -
Influence of laser cutting on the fatigue limit of two high strenght steels
Mateo García, Antonio Manuel; Fargas Ribas, Gemma; Calvo Muñoz, Jessica; Roa Rovira, Joan Josep (2015-03-05)
Article
Accés obertLaser cutting is widely used in the metal industry, particularly when components of high strength steel sheets are produced. However, the roughness of cut edges produced by laser differs from that obtained by other methods, ... -
INFLUENCE OF LASER CUTTING ON THE FATIGUE LIMIT OF TWO HIGH STRENGTH STEELS
Mateo García, Antonio Manuel; Fargas Ribas, Gemma; Calvo Muñoz, Jessica; Roa Rovira, Joan Josep (2013)
Text en actes de congrés
Accés obertLaser cutting is widely used in the metal industry, particularly when components of high strength steels sheets are produced. On the other hand, the roughness of cut - edges produced by laser differs from that obt ained ... -
Influence of microstructural assemblage of the substrate on the adhesion strength of coated PcBN grades
Gordon Pozuelo, Sandra; Roa Rovira, Joan Josep; Rodríguez Suárez, Teresa; M'Saoubi, Rachid; Jiménez Piqué, Emilio; Franca, Luiz F.P.; Llanes Pitarch, Luis Miguel (2022-01-01)
Article
Accés restringit per política de l'editorialCoated polycrystalline cubic boron nitride (PcBN) tools are increasingly used for industrial applications with stringent requirements. However, information on the mechanical integrity of these systems is quite limited. ... -
Influence of microstructure and mechanical properties on the tribological behavior of reactive arc deposited Zr-Si-N coatings at room and high temperature
Yalamanchili, Kumar; Jiménez Piqué, Emilio; Pelcastre, L.; Roa Rovira, Joan Josep; Johansson Joesaar, M.P; Prakash, Bhanu; Ghafoor, N; Odén, Magnus (Elsevier, 2016-10-25)
Article
Accés obertVarying the Si-content in Zr-Si-N coatings from 0.2 to 6.3 at.% causes microstructural changes from columnar to nanocomposite structure and a hardness drop from 37 to 26 GPa. The softer nanocomposite also displays lower ... -
Influence of pre-existing martensite on the wear resistance of metastable austenitic stainless steels
Fargas Ribas, Gemma; Roa Rovira, Joan Josep; Mateo García, Antonio Manuel (2016)
Article
Accés obertThe effect of pre-existing martensite on the sliding wear behavior of a commercial metastable austenitic stainless steel was investigated. Two different steel conditions were considered: annealed (with a fully austenitic ... -
Influence of specimen size and microstructure on uniaxial compression of WC-Co micropillars
Sandoval Ravotti, Daniela Andreina; Rinaldi, Antonio; Notargiacomo, A.; Ther, O; Tarrés Puit, Elena; Roa Rovira, Joan Josep; Llanes Pitarch, Luis Miguel (2019-09-13)
Article
Accés obertThe current interest on the development of components on the micrometer size regime demands the evaluation of the mechanical behavior at such small length scales. Regarding cemented carbides, evaluation of mechanical ... -
Influence of testing mode on the fatigue behavior of <111> austenitic grain at the nanometric length scale for TRIP steels
Roa Rovira, Joan Josep; Sapezanskaia, Ina; Fargas Ribas, Gemma; Kouitat, R.; Redjaïmia, A.; Mateo García, Antonio Manuel (2018-01-24)
Article
Accés obertMetastable austenitic stainless steels, and in particular the TRansformation Induced Plasticity steels, rely on a phase transformation from a ductile austenite to a slightly harder martensite. These materials under fatigue ... -
Influence of the crystallographic orientation on the yield srength and deformation mechanisms of astenitic grains in metastable sainless steels investigated by spherical nanoindentation
Roa Rovira, Joan Josep; Suárez, Sebastian; Yang, Huaidong; Fargas Ribas, Gemma; Guitar, Agustina; Rayón Encinas, Emilio; Green, Itzhak; Mateo García, Antonio Manuel (2019-06-13)
Article
Accés obertThe mechanical behavior of a metastable stainless steel is studied by spherical nanoindentation, as a function of crystallographic orientation of its austenitic grains. The residual imprints are analyzed by electron ... -
Influence of the mean carbide size on the micromechanical response of WC-Co hardmetals
Sandoval, Daniela A.; Tarrago, J.M.; Rinaldi, Antonio; Notargiacomo, A.; Roa Rovira, Joan Josep; Fair, Jonathan; Llanes Pitarch, Luis Miguel (2017)
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Accés restringit per política de l'editorial -
Influence of the processing route on the properties of Ti(C,N)-Fe15Ni cermets
Nicolás Morillas, Maria de; Besharatloo, Hossein; Wheeler, J.M.; Dios Pérez, Miguel de; Alvaredo Olmos, Paula; Roa Rovira, Joan Josep; Ferrari, B; Llanes Pitarch, Luis Miguel; Gordo Odériz, Elena (2020-02-01)
Article
Accés obertThis study aims to understand the influence of powder preparation and processing steps on the microstructure and properties of Ti(C,N)-Fe15Ni cermets with 70 and 80 vol% of ceramic phase. Two routes were used for powder ... -
Intrinsic hardness of constitutive phases in WC-Co composites: Nanoindentation testing, statistical analysis, WC crystal orientation effects and flow stress for the constrained metallic binder
Roa Rovira, Joan Josep; Jiménez Piqué, Emilio; Verge, C.; Tarragó Cifre, Jose María; Mateo García, Antonio Manuel; Fair, Jonathan; Llanes Pitarch, Luis Miguel (Elsevier, 2015-11-01)
Article
Accés obertThe intrinsic hardness of the constitutive phases in WC-Co composites is investigated by combining experimental and statistical analysis nanoindentation techniques. It is done on the basis of considering the cemented carbide ... -
Intrinsic hardness of constitutive phases in WC–Co composites:Nanoindentation testing, statistical analysis, WC crystal orientation effectsand flow stress for the constrained metallic binder
Roa Rovira, Joan Josep; Jiménez Piqué, Emilio; Verge, C.; Tarrago, J.M.; Mateo García, Antonio Manuel; Fair, Jonathan; Llanes Pitarch, Luis Miguel (Elsevier, 2015-11-03)
Article
Accés obertThe intrinsic hardness of the constitutive phases in WC–Co composites is investigated by combining experimental and statistical analysis nanoindentation techniques. It is done on the basis of considering the cemented carbide ... -
Laser surface modification for enhancing mechanical properties of metastable stainless steel 301LN
Rezayat, Mohammad; Ramos, F.; Roa Rovira, Joan Josep; Mateo García, Antonio Manuel (Universitat Politècnica de Catalunya, 2022-06-16)
Comunicació de congrés
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Laser-assisted surface modification of zirconia-based materials to guide osteoblast responses for dental applications
García de Albéniz López de Aberasturi, Nerea; Roa Rovira, Joan Josep; Mas Moruno, Carlos (Sociedad Española de Materiales, 2022-04-05)
Article
Accés obertThe project is aimed at investigating the effect of laser surface modification of dental-grade zirconia (3Y-TZP) to guide cellular behaviour. A nanosecond laser was employed to fabricate groove patterns on the surface of ...