Ara es mostren els items 148-167 de 177

    • R-Curve approach to describe the fracture resistance of tool steels 

      Picas Anfruns, Ingrid; Casellas Padró, Daniel; Llanes Pitarch, Luis Miguel (2016-06)
      Article
      Accés obert
      This work addresses the events involved in the fracture of tool steels, aiming to understand the effect of primary carbides, inclusions, and the metallic matrix on their effective fracture toughness and strength. ...
    • Residual strength of WC-Co cemented carbides after being subjected to abrupt temperature changes 

      Tarragó Cifre, Jose María; Serra, Ignacio; Al-Dawery, Ihsan; Llanes Pitarch, Luis Miguel (2014)
      Text en actes de congrés
      Accés obert
      Thermal shock and thermal fatigue are recognized as common failure modes for WC - Co cemented carbides (hardmetals) in several applications in volving service temperature changes. However, information on microst ...
    • Resistencia mecánica de carburos cementados: influencia de la temperatura y la microestructura 

      Moyano, I; Bermejo, Raul; Salán Ballesteros, Maria Núria; Chicardi, E; Gotor Martínez, Francisco José; Llanes Pitarch, Luis Miguel; Torres Hernández, Yadir (2015-04)
      Article
      Accés obert
      En esta investigación se ha evaluado el efecto de la temperatura en la resistencia mecánica de carburos cementados (WC-Co) con diferente camino libre medio de la fase ligante. La misma se determinó a 600°C con discos ...
    • Robocasting of dense 8Y zirconia parts: Rheology, printing, and mechanical properties 

      Zhang, Junhui; Yarahmadi, Mona; Cabezas i Peñalva, Laura; Serra Fanals, Marc; Elizalde Huitrón, Sergio Alberto; Cabrera Marrero, José M.; Llanes Pitarch, Luis Miguel; Fargas Ribas, Gemma (Elsevier, 2023-07-08)
      Article
      Accés obert
      Advanced ceramics with complex geometry have become indispensable in engineering applications. Due to limitations of traditional ceramic fabrication processes, additive manufacturing represents a revolution for shaping and ...
    • Scale effect in mechanical characterization of WC-Co composites 

      Sandoval Ravotti, Daniela Andreina; Rinaldi, Antonio; Tarragó, José María; Roa Rovira, Joan Josep; Fair, Jonathan; Llanes Pitarch, Luis Miguel (2018-04-01)
      Article
      Accés obert
      © 2017 Elsevier LtdThe study of mechanical response of materials at small length scales has gained importance due to the recent advances in micro- and nano-fabrication as well as testing systems. However, most of the ...
    • Small scale fracture behaviour of multilayer TiN/CrN systems: Assessment of bilayer thickness effects by means of ex-situ tests on FIB-milled micro-cantilevers 

      Roa Rovira, Joan Josep; Rodríguez, R.; Lamelas, Victor; Jiménez Piqué, Emilio; Llanes Pitarch, Luis Miguel; Martínez, R. (Elsevier, 2016-12-25)
      Article
      Accés obert
      TiN/CrN multilayered PVD coatings are known to exhibit outstanding micromechanical properties and wear resistance. On the other hand, information on their small scale fracture behaviour is rather scarce. The present work ...
    • Small scale mechanical response of WC-Co cemented carbides 

      Roa Rovira, Joan Josep; Jiménez Piqué, Emilio; Sandoval, Daniela A.; Tarrago, Jose María; Fair, Jonathan; Tarrés, E.; Llanes Pitarch, Luis Miguel (2017)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In recent years, many efforts have been invested to determine the intrinsic mechanical properties for each constitutive phase of composite materials. The outstanding behaviour of WC-Co composites is mainly attributed to ...
    • Small-scale assessment of corrosion-induced damage in hardmetals 

      Zheng, Yafeng; Fargas Ribas, Gemma; Besharatloo, Hossein; Roa Rovira, Joan Josep; Lavigne, Olivier; Llanes Pitarch, Luis Miguel (2019)
      Text en actes de congrés
      Accés obert
      In this work, the effect of corrosion-induced damage on the mechanical response of hardmetals was evaluated at small-scale level by means of nanoindentation and nanoscratch. Damage was introduced in a controlled way through ...
    • Small-scale mechanical properties of constitutive phases within a polycrystalline cubic boron nitride composite 

      Besharatloo, Hossein; Gordon Pozuelo, Sandra; Rodríguez Suárez, Teresa; Llanes Pitarch, Luis Miguel; Roa Rovira, Joan Josep (Elsevier, 2019-01-01)
      Article
      Accés obert
      Micromechanical properties of a polycrystalline cubic boron nitride (PcBN) composite have been assessed by statistical analysis of data gathered from experimental massive nanoindentation. The mechanical study was complemented ...
    • Spherical indentation of polycrystalline cubic boron nitride (PcBN): contact damage evolution with increasing load and microstructural effects 

      Gordon Pozuelo, Sandra; García Marro, Fernando; Rodríguez Suárez, Teresa; Roa Rovira, Joan Josep; Jiménez Piqué, Emilio; Llanes Pitarch, Luis Miguel (Elsevier, 2023-02)
      Article
      Accés obert
      The extremely severe conditions at which cutting tools are exposed in hard machining operations require tool materials with outstanding mechanical properties. Excellent combinations of high hardness and fracture toughness ...
    • Strength and reliability of WC-Co cemented carbides: understanding microstructural effects on the basis of R-curve behavior and fractography 

      Tarragó Cifre, Jose María; Coureaux Mustelier, David; Torres Hernández, Yadir; Jiménez Piqué, Emilio; Schneider, Ludwig; Fair, Jonathan; Llanes Pitarch, Luis Miguel (2018-02)
      Article
      Accés obert
      Strength and reliability of WC-Co cemented carbides (hardmetals) are dependent on effective fracture toughness as well as on nature, size and distribution of processing flaws. Regarding toughness, they exhibit a crack ...
    • Strength degradation of cemented carbides due to thermal shock 

      Tarragó Cifre, Jose María; Dorvlo, Selassie; Al-Dawery, Ihsan; Llanes Pitarch, Luis Miguel (2015)
      Comunicació de congrés
      Accés obert
      Despite the recognition of thermal shock and thermal fatigue as common failure modes in cemented carbide applications, the information on the influence of the microstructure on the resistance of hardmetals to abrupt ...
    • Strengthening zones in the Co matrix of WC-Co cemented carbides 

      Konyashin, Igor Yu; Lachmann, Frank Friedrich; Ries, Bernd Heinrich; Mazilkin, Andrei A.; Straumal, Boris B.; Kübel, Christian; Llanes Pitarch, Luis Miguel; Baretzky, Brigitte (2014-07-15)
      Article
      Accés restringit per política de l'editorial
      For conventional structural and tool materials, in particular WC-Co cemented carbides, hardness and wear-resistance can usually be increased only at the expense of toughness and strength. For the first time we have achieved ...
    • Substrate surface finish effects on scratch resistance and failure mechanisms of TiN-coated hardmetals 

      Yang, Jing; Roa Rovira, Joan Josep; Odén, Magnus; Johansson Joesaar, M.P; Esteve, Joan; Llanes Pitarch, Luis Miguel (Elsevier, 2015-03-15)
      Article
      Accés obert
      In this study, the influence of substrate surface finish on scratch resistance and associated failure mechanisms is investigated in the case of a TiN-coated hardmetal. Three different surface finish conditions are studied: ...
    • Surface integrity assessment of laser treated and subsequently coated cemented carbides 

      Fang, Shiqi; García Marro, Fernando; Salán Ballesteros, Maria Núria; Cruz, Marlon; Colominas Guardia, Carles; Baehre, Dirk; Llanes Pitarch, Luis Miguel (2019)
      Article
      Accés obert
      Cemented carbides, referred to as hardmetals, are forefront engineering materials widely implemented in industry for chip-removal cutting tools and supporting parts. As a newly developed technology for surface modification ...
    • Surface integrity of new dry-electropolishing technology on WC-Co cemented carbides 

      Riu Perdrix, Guiomar; Weil, Dominik; Llanes Pitarch, Luis Miguel; Johanns, Kurt; Oliver, Warren C.; Roa Rovira, Joan Josep (Elsevier, 2022)
      Article
      Accés obert
      This study is focused on WC-Co dry-electropolished by DryLyte® technology that allows to obtain corrosion-free surfaces with a roughness below 9 nm. The main goal behind this research is to investigate the surface integrity ...
    • Surface modification approaches for enhancing fracture and fatigue resistance of electrical discharge machined hardmetals 

      Llanes Pitarch, Luis Miguel; Casas, B.; Torres, Yadir; Anglada Gomila, Marcos Juan (2010)
      Text en actes de congrés
      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. ...
    • Surface patterning of cemented carbides by means of nanosecond laser 

      Fang, Shiqi; Pérez, Víctor; Salán Ballesteros, Maria Núria; Baehre, Dirk; Llanes Pitarch, Luis Miguel (2020)
      Article
      Accés obert
      A nanosecond laser combined with a two-axis reflection control unit is used to shape polygonal pyramids with defined geometry on a specific cemented carbide grade. In total, 12 different surface patterns have been fabricated, ...
    • Surface topography quantification of super hard abrasive tools by laser scanning microscopy 

      Fang, Shiqi; Llanes Pitarch, Luis Miguel; Engstler, M.; Baehre, D.; Soldera, Flavio; Muecklich, F. (2016)
      Article
      Accés obert
      Non-conventional super hard abrasive tools are made of composite materials containing super hard grains, e.g., diamond or cubic boron nitride (CBN) grains, bound by a metallic constitutive phase. These tools are usually ...
    • Testing length-scale considerations in mechanical characterization of WC-Co hardmetal produced via binder jetting 3D printing 

      Cabezas i Peñalva, Laura; Berger, Christian; Jiménez Piqué, Emilio; Pötschke, Johannes; Llanes Pitarch, Luis Miguel (2023-02-01)
      Article
      Accés obert
      The extreme versatility of additive manufacturing (AM) as processing technology results in “AMed pieces” with intrinsic characteristics linked to the shaping route followed, which are also key for defining mechanical ...