Now showing items 21-40 of 62

    • Estudio del efecto de los ultrasonidos en la microestructura y propiedades mecánicas de componentes de automoción conformados en estado semisólido. 

      Ighaddouran, Mohammed (Universitat Politècnica de Catalunya, 2013)
      Bachelor thesis
      Open Access
      El objetivo principal del presente proyecto ha sido la modificación de la microestructura de la aleación de aluminio A357 mediante la aplicación de ultrasonidos. Se analiza el efecto de los ultrasonidos y de la temperatura ...
    • Estudio del proceso de fabricación de un componente metálico para pantallas térmicas por estampación 

      López Manresa, Sergio (Universitat Politècnica de Catalunya, 2016-01)
      Bachelor thesis
      Restricted access - author's decision
      En este trabajo se pretende analizar el caso real de una pantalla térmica con defectos. Una pantalla térmica es una pieza que sirve para aislar los elementos que trabajan a altas temperaturas y necesitan ser aislados ...
    • Fabricación de polvo metálico de aleaciones base cobre y base aluminio por atomización centrífuga. 

      Panavera Albrich, Eloi (Universitat Politècnica de Catalunya, 2018-05)
      Master thesis
      Restricted access - author's decision
      Covenantee:   Centre Tecnològic de Manresa
      El principal objetivo de este proyecto es la fabricación de partículas de polvo de cobre y de aleación de aluminio-silicio, mediante un equipo de atomización centrífuga. Se han realizado las atomizaciones oportunas para ...
    • Formability of the 5754-aluminum alloy deformed by a modified repetitive corrugation and straightening process 

      Ezequiel Alvarado, Marco Alejandro; Elizalde Huitrón, Sergio Alberto; Cabrera Marrero, José M.; Picas Barrachina, Josep Anton; Figueroa, I. A.; Alfonso, Ismeli; González, Gonzalo (Multidisciplinary Digital Publishing Institute (MDPI), 2020-01)
      Article
      Open Access
      Sheets of 5754-aluminum alloy processed by a modified repetitive corrugation and straightening (RCS) process were tested in order to measure their formability. For this purpose, forming limit curves were derived. They ...
    • Friction Stir Welding and Processing of Aluminium Alloys 

      Serra Bigas, Estela (Universitat Politècnica de Catalunya / AGH University of Science and Technology, 2011)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      Covenantee:   Akademia Górniczo-Hutnicza im. S. Staszica w Krakowie
      Friction Stir Welding is a method which joint different materials that in traditional weld it can’t be welded. This technique improves properties of materials because to be weld materials don’t pass to the liquid-state, ...
    • Improving the corrosion performance of hybrid sol-gel matrix by modification with phosphonic acid 

      Dalmoro, Viviane; Dos Santos, J.H.Z.; baibich, Lone M; Butler, Ian S; Armelín Diggroc, Elaine Aparecida; Alemán Llansó, Carlos; Azambuja, Denise S. (2015-03-01)
      Article
      Open Access
      Sol-gel films were prepared using different ratios of two silica precursors, vinyltrimethoxysilane (VTMS) and tetraethylorthosilicate (TEOS), targeting the anticorrosion treatment of aluminum alloy 2024-T3. The electrochemical ...
    • Innovative NDT technique for detection of surface cracks based on ferrofluids excited with DC and AC magnetic fields 

      Rojas Gregorio, José Ignacio; Cabrera, Blai; Musterni, Gerard; Nicolas, Jorge; Tristancho Martínez, Joshua; Crespo Artiaga, Daniel (2015-03-31)
      External research report
      Open Access
      An innovative NDT technique is proposed for surface inspection of materials not necessarily magnetic or conductive, based on local magnetic field variations due to ferrofluid deposited in the cracks. The feasibility of the ...
    • Investigation of the response of a ferrofluid in a surface crack under an applied magnetic field 

      Musterni Girbau, Gerard (Universitat Politècnica de Catalunya, 2014-10-06)
      Bachelor thesis
      Open Access
      Non-destructive testing (NDT) is of paramount importance in both the aerospace and general markets. Nowadays, several NDT techniques are available and widely recognised for inspection services. However, wide research is ...
    • Investigation on repairs of aircraft composite structures made with various joining techniques 

      Pitta, Siddharth; Roure Fernández, Francisco; Crespo Artiaga, Daniel; Rojas Gregorio, José Ignacio (2018)
      Conference lecture
      Restricted access - publisher's policy
      In the race for developing aircraft with lighter airframe, aiming at increasing aircraft payload and/or fuel efficiency, the shift from conventional metal structures to light-weight composite structures has attracted ...
    • Joining metrics enhancement when combining FSW and ball-burnishing in a 2050 aluminium alloy 

      Sánchez Egea, Antonio José; Rodriguez, Adrian; Celentano, Diego Javier; Calleja, Amaia; López de la Calle, Luís Norberto (Elsevier, 2019-06-15)
      Article
      Open Access
      This report describes the effect of the ball-burnishing process on the mechanical properties of 2050 aluminium alloy that was previously friction stir welded. This process is a fast, environmentally-friendly and cost-effective ...
    • Mechanical properties at nanometric scale of alumina layers formed in sulphuric acid anodizing under burning conditions 

      Roa Rovira, Joan Josep; Gascon-Garcia, B; Garcia-Lecina, E.; Muller, C (2011-03-23)
      Article
      Restricted access - publisher's policy
      A mechanical study (hardness, H and Young's modulus, E) at nanometric scale of the distribution of mechanical properties across the surface of porous anodic alumina (PAA) films formed during aluminium anodizing in sulphuric ...
    • Microstructural characterization & viscoelastic properties of AlZnMgCu alloys for aerospace applications 

      Rojas Gregorio, José Ignacio; Crespo Artiaga, Daniel (2010-07)
      Doctoral thesis proposal
      Open Access
      The mechanical properties of materials (and particularly the viscoelastic properties) are intimately linked to their microstructure. Thereby, microstructural transformations are reflected on the viscoelastic behaviour. ...
    • Modificación de las propiedades superficiales de la aleación de aluminio 2024-T3 a partir de alcanotioles y su influencia en la protección contra la corrosión utilizando polímeros conductores 

      Conchello Cases, Antonio José (Universitat Politècnica de Catalunya, 2015-04)
      Master thesis (pre-Bologna period)
      Open Access
      El presente proyecto evalúa y analiza las propiedades físicas y químicas y el efecto protector contra la corrosión de un recubrimiento de poli(3,4-etilendioxitiofeno) (PEDOT), sobre monocapas autoensambladas (SAMs) generadas ...
    • New aluminium-silicon-copper microalloyed alloys 

      Font Moragón, Jaume; Schlesier Corrales, Alfred (Universitat Politècnica de Catalunya, 2018-02)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Bostlan / Aleastur
      [ANGLÈS] The objective of this project has been the development of new microalloyed aluminium-silicon-copper alloys, in order to obtain materials with improved properties through the application of heat treatments. Initially ...
    • New short T6 heat treatments for aluminium silicon alloys obtained by semisolid forming 

      Menargues Muñoz, Sergi; Martín Fuentes, Enrique; Baile Puig, Maria Teresa; Picas Barrachina, Josep Anton (2014-11-07)
      Article
      Restricted access - publisher's policy
      In this work the heat treatment response of SSM processed A356 and A357 casting alloys was analysed. The development of a new T6 heat treatment, with solution times less than 30 mm has been allowed. In this new short heat ...
    • Nous aliatges d'alumini microaliat 

      Font Moragón, Jaume; Cortina Murillo, Adrià (Universitat Politècnica de Catalunya, 2017-07)
      Bachelor thesis
      Restricted access - author's decision
      L’objectiu d’aquest projecte ha estat el desenvolupament de nous aliatges microaliats d’alumini per tal d’aconseguir materials amb propietats millorades mitjançant l’aplicació de tractaments tèrmics. Per poder dur a terme ...
    • Nous tractaments superficials d'aliatges d'alumini 

      Aguado Cubillo, Jordi (Universitat Politècnica de Catalunya, 2005-06)
      Master thesis (pre-Bologna period)
      Open Access
      La intenció d’aquest projecte és posar a punt un mètode analític capaç de controlar, mitjançant el fenomen de la fluorescència de raigs X, la composició superficial de xapes laminades. Aquest mètode permet estalviar temps ...
    • Numerical and experimental study of a 5754-aluminum alloy processed by heterogeneous repetitive corrugation and straightening 

      Ezequiel Alvarado, Marco Alejandro; Figueroa, I. A.; Elizalde Huitrón, Sergio Alberto; Cabrera Marrero, José M.; Braham, C.; Morin, Laurent; González Reyes, José Gonzalo (Elsevier, 2019-01-01)
      Article
      Restricted access - publisher's policy
      Repetitive corrugation and straightening (RCS) is a process that induces cyclic plastic deformation on sheet geometries, reporting promising improvements in mechanical properties in metals and alloys. Alternative die ...
    • On the static strength of aluminium and carbon fibre aircraft lap joint repairs 

      Pitta, Siddharth; de la Mora Carles, Victor; Roure Fernández, Francisco; Crespo Artiaga, Daniel; Rojas Gregorio, José Ignacio (2018-10-01)
      Article
      Restricted access - publisher's policy
      The behaviour of various aircraft lap joint repair configurations is investigated experimentally and numerically under static loading. The lap joints consist of aluminium alloy (AA) 2024-T3 substrates repaired with twin ...
    • Optimización de los tratamientos térmicos T5 y T6 para una aleación de aluminio A356 conformada por SLC 

      Fresno Abad, David (Universitat Politècnica de Catalunya, 2007-06-29)
      Master thesis (pre-Bologna period)
      Open Access
      La gran competencia que hay en el sector de la automoción y aeronàutica obliga a las industrias a producir nuevos componentes de aluminio con mejores propiedades mecánicas, menos defectos y encontrar fórmulas para reducir ...