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Ara es mostren els items 21-40 de 93

  • Efecto de la microestructura en la nucleación y propagación de fisuras en aceros de herramienta de trabajo en frío 

    Picas Anfruns, Ingrid; Cuadrado Lafoz, Núria; Casellas Padró, Daniel; Goez, Alexey; Llanes Pitarch, Luis Miguel (2011)
    Text en actes de congrés
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  • Effect of carbides properties and microstructural characteristics on crack nucleation and propagation in cold forming tools 

    Casellas Padró, Daniel; Picas Anfruns, Ingrid; Castella López, Elena; Goez, Alexey; Llanes Pitarch, Luis Miguel; Casas Aguirregomezcorta, Begoña; Valls, I. (2009)
    Text en actes de congrés
    Accés restringit per política de l'editorial

  • Effect of crystal anisotropy on the mechanical properties of WC embedded in WC-Co cemented carbides 

    Cuadrado, Núria; Casellas Padró, Daniel; Llanes Pitarch, Luis Miguel; Gonzalez, Iban; Caro, Jaume (2011)
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  • Enhanced contact fatigue behavior of coated tool steels by using PM substrates 

    Ramírez, Giselle; Goez, Alexey; Casas Aguirregomezcorta, Begoña; Valls, I.; Martinez, R.; Llanes Pitarch, Luis Miguel (2009)
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    Accés restringit per política de l'editorial

  • Enhanced hydrothermal resistance of Y-TZP ceramics through colloidal processing 

    Rayón Encinas, Emilio; Moreno, R.; Alcázar, C.; Salvador Moya, Maria Dolores; Manjon Herrera, Francisco Javier; Jiménez Piqué, Emilio; Llanes Pitarch, Luis Miguel (2013-02-28)
    Article
    Accés restringit per política de l'editorial
    Two commercial zirconia powders with 3 mol% of yttria (TZ3YE and TZ3YS, labeled as ZE and ZS, respectively) sup- plied by Tosoh (Japan) were used for this study. Maximum colloidal stability for ZE was achieved by ...

  • Fatiga isotérmica de aceros para herramientas de trabajo en caliente 

    Mateo García, Antonio Manuel; Llanes Pitarch, Luis Miguel; Casas, B.; Mir, J.; Molas, S. (2011-06-20)
    Article
    Accés obert
    El trabajo reportado en este artículo forma parte de un proyecto de investigación en el cual se tratan de desarrollar aceros de herramientas para conformado en caliente con prestaciones optimizadas. Para ello se comenzó ...

  • Fatiga isotérmica de aceros para herramientas de trabajo en caliente 

    Mateo García, Antonio Manuel; Casas, B.; Mir Carbonell, Jordi; Molas, S.; Llanes Pitarch, Luis Miguel (2010)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    El trabajo reportado en este artículo forma parte de un proyecto de investigación en el cual se tratan de desarrollar aceros de herramientas para conformado en caliente con prestaciones optimizadas. Para ello se comenzó ...

  • Fatigue behavior of a WC-Ni cemented carbide 

    Tarragó Cifre, Jose María; Ferrari, Claudio; Reig, Blanca; Coureaux Mustelier, David; Schneider, Ludwig; Llanes Pitarch, Luis Miguel (2013)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    Nickel is one of the materials most commonly used as a binder alternative to cobalt in cemented carbides. However, knowledge on mechanical properties and particularly on fatigue response of nickel-base cemented carbides ...

  • 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
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    En 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 ...

  • Fatigue performance improvement of electrical discharge machined hardmetals by means of combined thermal annealing and surface modification routes 

    Llanes Pitarch, Luis Miguel; Casas Aguirregomezcorta, Begoña; Salán Ballesteros, Maria Núria; Mestra Rodríguez, Álvaro Miguel; Torres Hernández, Yadir (2013-01)
    Article
    Accés restringit per política de l'editorial
    Electrical discharge machining (EDM) provides an effective means of shaping hardmetals. However, it is also known that surface integrity of these materials may be affected by EDM, degrading their tribomechanical characteristics. ...

  • Fatigue strength of cold-work tool steels: microstructure – critical flaw correlation 

    Goez, Alexey; Picas Anfruns, Ingrid; Valls, I.; Casas, B.; Casellas Padró, Daniel; Llanes Pitarch, Luis Miguel (2009)
    Comunicació de congrés
    Accés restringit per política de l'editorial

  • Fatigue susceptibility under contact loading of hardmetals coated with ceramic films 

    Llanes Pitarch, Luis Miguel; Tarrés, E.; Ramírez, Giselle; Botero Vega, Carlos Alberto; Jiménez Piqué, Emilio (2010-04)
    Article
    Accés restringit per política de l'editorial
    The contact fatigue behavior of a fine-grained hardmetal coated with two distinct ceramic films, either a TiN monolayer or a WC/C multilayer, is studied by means of indentation testing techniques. Spherical indentation ...

  • Fatigue testing and properties of hardmetals in the gigacycle range 

    Kotas, Agnieszka Betzwar; Danninger, Herbert; Weiss, Brigitte; Mingard, K.P.; Sánchez, José; Llanes Pitarch, Luis Miguel (2017-01-01)
    Article
    Accés obert
    Hardmetal products are frequently fatigue loaded in service, such as e.g. cutting tools for milling or percussion drills. In the present work, the fatigue behaviour of hardmetals was investigated into the gigacycle range ...

  • FIB/FESEM experimental and analytical assessment of R-curve behavior of WC-Co cemented carbides 

    Tarragó Cifre, Jose María; Jiménez Piqué, Emilio; Schneider, Ludwig; Casellas Padró, Daniel; Torres, Y.; Llanes Pitarch, Luis Miguel (2015-10-01)
    Article
    Accés obert
    Exceptional fracture toughness levels exhibited by WC-Co cemented carbides (hardmetals) are due mainly to toughening derived from plastic stretching of crack-bridging ductile enclaves. This takes place due to the development ...

  • Fractura de materiales 

    Alcalá Cabrelles, Jorge; Llanes Pitarch, Luis Miguel; Mateo García, Antonio Manuel; Salán Ballesteros, Maria Núria (Edicions UPC, 2002)
    Llibre
    Accés restringit a la comunitat UPC
    Todos los componentes de aplicación en ingeniería están sometidos, en mayor o menor grado, a procesos de fatiga y fractura. La fractura de los materiales es un fenómeno que comenzó a cobrar importancia a partir de la ...

  • Fracture and fatigue behavior of a WC-Ni cemented carbide 

    Tarragó Cifre, Jose María; Ferrari, Claudio; Reig, Blanca; Coureaux Mustelier, David; Schneider, Ludwig; Llanes Pitarch, Luis Miguel (2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Nowadays, one of the main research areas in cemented carbides is focused on the replacement of cobalt as a binder for more economical materials with similar or improved properties. Nickel is one of the materials most ...

  • Fracture and fatigue behavior of cement carbides:3D focused ion beam tomography of crack-microstructure interactions 

    Tarragó Cifre, Jose María; Jiménez Piqué, Emilio; Turón Viñas, Miquel; Rivero, Lorenzo; Al-Dawery, Ihsan; Schneider, Ludwig; Llanes Pitarch, Luis Miguel (2014-09-01)
    Article
    Accés obert
    The fracture and fatigue phenomena in WC-cobalt cemented carbides (hard-metals) have been subjects extensively investigated in the last 30 years. From these studies, it is well established that the metallic binder phase ...

  • Fracture and fatigue behavior of WC-Co and WC-CoNi cemented carbides 

    Tarragó Cifre, Jose María; Roa Rovira, Joan Josep; Valle, Vladimir; Marsahll, J. M.; Llanes Pitarch, Luis Miguel (2015-03-01)
    Article
    Accés obert
    The fracture and fatigue characteristics of several cemented carbide grades are investigated as a function of their microstructure. In doing so, the influence of binder chemical nature and content (Co and 76 wt.% Co-24 ...

  • Fracture and fatigue of rock bit cemented carbides: Mechanics and mechanisms of crack growth resistance under monotonic and cyclic loading 

    Torres, Y.; Tarragó Cifre, Jose María; Coureaux Mustelier, David; Tarrés, E.; Roebuck, C.; Chan, P.; James, M.; Liang, B.; Tillman, M.; Viswanadham, R.K.; Mingard, K.P.; Mestra Rodríguez, Álvaro Miguel; Llanes Pitarch, Luis Miguel (2014-07-01)
    Article
    Accés restringit per política de l'editorial
    In an attempt to improve the material selection, design and reliability of rock bit WC-Co cemented carbides (hardmetals), an extensive and detailed study is conducted with the main goal of characterizing the fracture and ...

  • Fracture toughness of cemented carbides: Testing method and microstructural effects 

    Sheikh, Saad; M'Saoubi, Rachid; Flasar, Petr; Schwind, Martin; Persson, Tomas; Yang, Jing; Llanes Pitarch, Luis Miguel (2015-03-01)
    Article
    Accés obert
    Fracture toughness is one the most important parameters for design applications and performance assessment of WC-Co cemented carbides (hardmetals). Different from hardness, fracture toughness is commonly a property more ...