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TECNALIA Publications
Institutional Repository
481 Publications
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  • In vitro corrosion behaviour of surgical 316LVM stainless steel modified by Si+ ion implantation – An electrochemical impedance spectroscopy study

    Galván, J.C.; Larrea, M.T.; Braceras, I.; Multigner, M.; González-Carrasco, J.L. (2016)
    This work deals with the surface modification of 316LVM stainless steel by Si+ ion implantation and the in vitro study of its effect on the short-term corrosion behaviour and ion release. In order to achieve a high Si content close to the surface, the experimental set up was designed with different implantation doses, acceleration voltages and angles of incidence. Corrosion tests were carried out by Electrochemical Impedance Spectroscopy (EIS). A special feature of this paper is the evaluatio...

    Tool for the friction stir welding of two metal items with an angled joint having a pin and a wedge-shaped shoulder (ES)

    Martínez, Leonardo; Penalva, Mari Luz; Otaegui, Amaia (2008)
    The invention relates to a tool for the friction stir welding of two metal items with a joint angle of less than 180 DEG , comprised of a shoulder and a pin which exits from said shoulder. Said shoulder is wedge-shaped, with two walls forming an angle equal to the angle of the joint of the two metal items and with an interference zone at the meeting point of said walls. The interference zone is configured so as to penetrate the metal items at the angle of their joint. The pin exits from said...

    Molten aluminium attack on iron based alloys

    Carrera, E. A.; Ramírez-Ramírez, J. H.; Pérez-González, F. A.; González, J. A.; Crespo, I.; Braceras, I.; Martínez-de-la-Pera, I.; Larrañaga, A.; Garza-Montes-de-Oca, N. F.; Pérez-Unzueta, A. J.; Talamantes-Silva, J.; Cavazos, J. L.; Colás, R. (2017)
    Liquid aluminium alloys affect the moulds, by formation of intermetallic layers at their surface; such attack is enhanced by the flow of the molten metal on the surface of the tooling. Metal tooling are used to promote high heat transfer rates and increase the solidification rate to enhance mechanical properties in cast pieces, but the damage to their surface affects their quality and increases the production costs due to the need to repair them. This work presents the results of ...

    Preventing chatter vibrations in heavy-duty turning operations in large horizontal lathes

    Urbikain, G.; Campa, F.-J.; Zulaika, J.-J.; López de Lacalle, L.-N.; Alonso, M.-A.; Collado, V. (2015)
    Productivity and surface finish are typical user manufacturer requirements that are restrained by chatter vibrations sooner or later in every machining operation. Thus, manufacturers are interested in knowing, before building the machine, the dynamic behaviour of each machine structure with respect to another. Stability lobe graphs are the most reliable approach to analyse the dynamic performance. During heavy rough turning operations a model containing (a) several modes, or (b) modes with no...

    A Probabilistic Sample Matchmaking Strategy for Imbalanced Data Streams with Concept Drift

    L. Lobo, Jesus; Del Ser, Javier; Bilbao, Miren Nekane; Laña, Ibai; Salcedo-Sanz, Sancho (2016)
    In the last decade the interest in adaptive models for non-stationary environments has gained momentum within the research community due to an increasing number of application scenarios generating non-stationary data streams. In this context the literature has been specially rich in terms of ensemble techniques, which in their majority have focused on taking advantage of past information in the form of already trained predictive models and other alternatives alike. This manuscript elaborates ...
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