Exploració per autor "Casellas Padró, Daniel"

Ara es mostren els items 29-48 de 50

    • Geometry of nanoindentation cube-corner cracks observed by FIB tomography: Implication for fracture resistance estimation 

      Cuadrado Lafoz, Nuria; Seuba, J.; Casellas Padró, Daniel; Anglada, M.; Jiménez Piqué, Emilio (Elsevier, 2015-09-01)
      Article
      Accés obert
      When indenting a brittle material with a sharp indenter, cracks can be generated at the corners of the imprint. From the length of these cracks, the fracture resistance can be estimated. This technique is simple and allows ...

    • Hard cutting of tailored hardened 22MnB5 

      Laumann, Till; Picas Anfruns, Ingrid; Grané, Marc; Casellas Padró, Daniel; Riera Colom, María Dolores; Valls, Isaac (Technischen Universität Graz, 2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In the present work, the feasibility of creating low strength zones in flanges of tailored hardened 22MnB5 is evaluated by means of the combining high and low thermal conductivity tool materials. Finite Element (FE) ...

    • High temperature scratch testing of hard PVD coatings deposited on surface treated tool steel 

      Pujante, Jaume; Vilaseca, Montserrat; Casellas Padró, Daniel; Riera Colom, María Dolores (2014-09-15)
      Article
      Accés obert
      Scratch testing is one of the most usual characterisation techniques for systems with thin hard coatings. Scratch tests are performed at run at room temperature, due to the risk of degradation of the indenter diamond tip ...

    • Identification of fracture toughness parameters to understand the fracture resistance of advanced high strength sheet steels 

      Frómeta Gutiérrez, David; Parareda, Sergi; Lara, Antoni; Molas Busquets, Sílvia; Casellas Padró, Daniel; Jonsén, P.; Calvo Muñoz, Jessica (2020-04-15)
      Article
      Accés obert
      The fracture toughness of four advanced high strength steel (AHSS) thin sheets is evaluated through different characterization methodologies, with the aim of identifying the most relevant toughness parameters to describe ...

    • Journal of Physics: Conference Series 

      Calvo Muñoz, Jessica; Frómeta Gutiérrez, David; Molas Busquets, Sílvia; Casellas Padró, Daniel (Institute of Physics (IOP), 2017)
      Article
      Accés obert
      Lightweight designs and demanding safety requirements in automotive industry are increasingly promoting the use of Advanced High Strength Steel (AHSS) sheets. Such steels present higher strength (above 800 MPa) but lower ...

    • Measuring the fracture toughness of single WC grains of cemented carbides by means of microcantilever bending and micropillar splitting 

      Ortiz Membrado, Laia; Cuadrado Lafoz, Nuria; Casellas Padró, Daniel; Roa Rovira, Joan Josep; Llanes Pitarch, Luis Miguel; Jiménez Piqué, Emilio (2021-08-01)
      Article
      Accés obert
      The main goal of this work is to obtain a reliable value of the fracture toughness of single grains of tungsten carbide (WC). It is attempted by testing microcantilever and micropillar samples shaped out, by means of focused ...

    • Micro-mechanical damage in tool steels analyzed by acoustic emission technique 

      Picas Anfruns, Ingrid; Martínez González, Eva; Casellas Padró, Daniel; Romeu Garbí, Jordi (2012-12-30)
      Article
      Accés restringit per política de l'editorial
      The carbides in tool steels act as hard particles and dictate the wear resistance. The origin of failure of these steels is mostly related with the carbide cracking, as a nucleation site of final cracks. This paper shows ...

    • Micromecanismos de daño sub-superficiales inducidos por indentación esférica en aceros herramientas recubiertos 

      Ramírez Sandoval, Giselle; Jiménez Piqué, Emilio; Mestra Rodríguez, Álvaro Miguel; Vilaseca, Montse; Casellas Padró, Daniel; Llanes Pitarch, Luis Miguel (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial

    • Microstructural effects on fracture toughness of ultra-high strength dual phase sheet steels 

      Frómeta Gutiérrez, David; Cuadrado Lafoz, Nuria; Rehrl, Johannes; Suppan, Clemens; Dieudonné, Thomas; Dietsch, Pascal; Calvo Muñoz, Jessica; Casellas Padró, Daniel (2021-01-20)
      Article
      Accés obert
      The influence of the microstructure on the fracture toughness of two industrially processed 1000 MPa dual-phase (DP) steel grades is investigated. Crack initiation and propagation resistance are evaluated by means of the ...

    • Microstructural effects on the fatigue crack nucleation in cold work tool steels 

      Picas Anfruns, Ingrid; Cuadrado, Núria; Casellas Padró, Daniel; Goez, Alexey; Llanes Pitarch, Luis Miguel (2010-04)
      Article
      Accés restringit per política de l'editorial
      Crack nucleation mechanisms in two types of cold work tool steels were evaluated under monotonic and cyclic loading conditions. The effect of the microstructural constituents: the primary alloy carbides and the tempered ...

    • Modelización y simulación de la compactación de una pieza pulvimetalúrgica 

      Riera Colom, María Dolores; Casellas Padró, Daniel; Prado Pozuelo, José Manuel (2001)
      Text en actes de congrés
      Accés obert
      En la industria del conformado, el diseño y el control de los procesos se han basado en la experiencia y, a menudo, se ha considerado un arte. La aplicación de los métodos numéricos reduce el coste del diseño y del propio ...

    • New tool to evaluate the fracture resistance of thin high strength metal sheets 

      Frómeta Gutiérrez, David; Lara, Antoni; Parareda Oriol, Sergi; Grifé, Laura; Casellas Padró, Daniel (Institute of Physics (IOP), 2020-11-19)
      Article
      Accés obert
      Fracture toughness has become a key property to predict the fracture performance of high strength metal sheets (edge cracking resistance, crash failure behaviour, local formability, etc.). However, the measurement of the ...

    • Numerical simulation of a rapid fatigue test of high Mn-TWIP steel via a high cycle fatigue constitutive law 

      Gonçalves Junior, Luis Antonio; Jiménez Reyes, Sergio; Cornejo Velázquez, Alejandro; Barbu, Lucia Gratiela; Parareda Oriol, Sergi; Casellas Padró, Daniel (2023-03)
      Article
      Accés obert
      The generation of reliable data in the high cycle fatigue domain is crucial to support further metallurgic developments of fatigue optimized steel grades. Commonly employed for this aim, traditional standardized characterization ...

    • On the correlation between fracture toughness and crash resistance of advanced high strength steels 

      Frómeta Gutiérrez, David; Lara, Antoni; Molas Busquets, Sílvia; Casellas Padró, Daniel; Rehrl, Johannes; Suppan, Clemens; Larour, Patrick; Calvo Muñoz, Jessica (2019-01-01)
      Article
      Accés restringit per política de l'editorial
      Automotive industry players have devoted large efforts to identify the material parameters governing the crash resistance of Advanced High Strength Steels (AHSS). Such knowledge is essential to improve impact performance ...

    • 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. ...

    • Sheet failure prediction during forming of advanced high strength steels 

      Gutiérrez, D.; Hernández, R.; Riera Colom, María Dolores; Lara, Toni; Casellas Padró, Daniel; Prado Pozuelo, José Manuel (2013)
      Text en actes de congrés
      Accés obert
      The automotive industry has increased significantly the use of advanced high strength steels (AHSS) in many structural components of vehicles, with the aim to reduce weight and also increase safety. The high resistance ...

    • Simulación de la compactación de polvo metálico: efecto del estado tensional de la matriz de compactación 

      Riera Colom, María Dolores; Casellas Padró, Daniel; Prado Pozuelo, José Manuel (2001)
      Text en actes de congrés
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      En este trabajo se presenta una primera simulación mediante el programa de elementos finitos ABAQUS de un proceso completo de compactación en frío de polvo metálico. El análisis comprende la colocación en la matriz de un ...

    • Simulation of hot stamping processes 

      Riera Colom, María Dolores; Coussirat Núñez, Miguel Gustavo; Guardo Zabaleta, Alfredo de Jesús; Valls, I; Casellas Padró, Daniel (Grips' Media Gmbh, 2008)
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      Accés restringit per política de l'editorial
      Hot stamping is a thermo-mechanical technique that enables to give to a metallic blank the desired geometry and properties in a single step, where deformation at high temperature, phase transformations and heat transfer ...

    • Study of the influence of the decrease of the apparent young’s modulus during unloading in the springback prediction 

      Cobo Molina, Raúl; Hernández Rossi, Ricardo; Benito Páramo, José Antonio; Casellas Padró, Daniel; Riera Colom, María Dolores (International Deep-Drawing Research Group (IDDRG), 2008)
      Text en actes de congrés
      Accés restringit per política de l'editorial

    • The role of adhesive forces and mechanical interaction on material transfer in hot forming of aluminium 

      Pujante, Jaume; Vilaseca, Montserrrat; Casellas Padró, Daniel; Riera Colom, María Dolores (2015-07-01)
      Article
      Accés obert
      In this work, the mechanisms resulting in transfer of aluminium on hot forming tools have been analysed by means of two separate laboratory tests. The influence of chemical affinity in aluminium adhesion has been studied ...