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Introduction
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September 2015 - present
Education
January 2012 - October 2015
Publications
Publications (26)
Residual Stress (RS) pattern changes considerably depending on the width of the plates and the welding parameters, having effect on the fatigue strength. Most of the standards do not consider them and in some works, yield stress is taken as residual stress value. It results in a very conservative estimation of fatigue life. Authors developed recent...
This work is part of an international project for the research on the transport properties in ternary mixtures. Six different teams have analysed the same mixture by independent techniques in order to compare the results and validate the techniques. This work is the contribution of the team of Mondragon Unibertsitatea for ground conditions measurem...
In this article, new experimental data of the thermal diffusion coefficient (D
T
) of 20 binary mixtures of hexane-hexadecane, decane-hexadecane, toluene-hexadecane and 1-metilnaphtalene-hexadecane at several different compositions and at 298K and atmospheric pressure, are reported. Thermal diffusion coefficients were measured in a thermogravitatio...
A new analytical methodology has been developed to determine the diagonal and cross-diagonal molecular diffusion coefficients in ternary mixtures by the Sliding Symmetric Tubes technique. The analytical solution is tested in binary mixtures obtaining good agreement with the results of the literature. Results are presented for the ternary mixture fo...
Residual stresses and surface roughness have been recognized to play a critical role in the fatigue strength of metal components. Machining processes can induce different roughness and residual stress conditions depending on the parameters used in the process. Therefore, it is essential to develop knowledge that helps to predict the residual stress...
The turning process remains one of the most widely used manufacturing methods in the industry due to its high flexibility and production rates. Despite being an extensively used technique, the impact of this machining process on the surface integrity of the components has not yet been resolved in the literature, although it is well known that it ca...
Residual stress and surface roughness have been recognized to play a critical role in the fatigue strength of metal components. Machining processes can induce different roughness and residual stress conditions depending on the parameters used in the process. Therefore, it is essential to develop knowledge that helps to predict the residual stresses...
Current demands for enhanced rotational speed in electric vehicle transmissions, aeronautical gearboxes and industrial machinery is known to affect the thermal behavior of mechanical parts by increasing their steady-state temperature. In geared transmissions, such condition is detrimental as the lubricating film is reduced thus increasing failure p...
Porosity is one of the main parameters in the fatigue life of cast alloys as it affects both crack initiation and propagation phases. However, most fatigue assessments present a lack of accuracy as they only consider the effect of the initial pore on the fatigue limit. Therefore, in the present study, first, the effect of the main porosity characte...
Tensile residual stress (RS) peaks near the weld toe accelerate crack generation and propagation stages reducing dramatically the life of welded components. In order to relief RS, components are typically heat-treated. However, heat treatments can affect the microstructure compromising mechanical properties. In addition, their application in big st...
This chapter presents a general background and the state of the art of numerical simulation and modelling of fretting phenomenon in terms of wear, fatigue and fracture. First of all, an introduction of fretting and its implications is exposed. Secondly, different methodologies for wear modelling and simulation are described and discussed. Afterward...
Residual Stress (RS) pattern changes considerably depending on the width of the plates and the welding parameters, having effect on the fatigue strength. Most of the standards do not consider them and in some works, yield stress is taken as residual stress value. It results in a very conservative estimation of fatigue life. Authors developed recent...
Aluminum alloys are widely used in the automotive industry due to their high strength / weight ratio. However, during the manufacturing processes, defects are introduced. One of these related to the casting process is porosity. This factor is very detrimental for the fatigue behavior of these alloys. For this reason, the objective of the present wo...
In casting parts, due to the manufacturing process, the presence of defects such as porosity, inclusions and oxide films is unavoidable. All these irregularities have a negative effect on the component performance. Several works have demonstrated that, among them, porosity is especially detrimental to the fatigue properties. As most fatigue failure...
In the present work, we have measured the thermodiffusion coefficient of 51 binary liquid mixtures at 25 oC. These mixtures correspond to the series of the aromatics toluene and 1-methylnaphthalene with n-alkanes nCi (i = 6, 8, 10, 12, and 14) at different mass fractions in the whole range. For that, we have used the thermogravitational technique....
In this work, the transport coefficients of the ternary mixtures of the diffusion coefficient measurements in ternary mixtures 1 project were determined. The analyzed ternary mixtures are formed by 1,2,3,4-tetrahydronaphthalene, isobutylbenzene, and dodecane (nC12) at different compositions. In all cases, the analysis was carried out at 25 °C. The...
With the aim of providing reliable benchmark values, we have measured the Soret, thermodiffusion and molecular diffusion coefficients for the ternary mixture formed by 1,2,3,4-tetrahydronaphthalene, isobutylbenzene and n-dodecane for a mass fraction of 0.8-0.1-0.1 and at a temperature of 25°C. The experimental techniques used by the six participati...
The objective of this work is the determination of diagonal and cross-diagonal molecular diffusion coefficients in a ternary mixture, using the ‘Sliding Symmetric Tubes’ (SST) technique. The analyzed mixture consists of two aromatics and one normal alkane (tetrahydronaphthalene–dodecane–isobutylbenzene) with an equal mass fraction for all component...
We present a new type of thermogravitational (TG) column, a so-called TG micro-column with transparent windows and a very small sample volume of less than 50 μL. The TG micro-column has a planar geometry with a thickness of 0.523+/-0.004 mm, a height of 30 mm and a width of 3 mm. The concentration difference between two points at different heights...
In this work we have measured the molecular diffusion coefficient of the n-alkane binary series nC(i)-nC(6), nC(i)-nC(10), and nC(i)-nC(12) at 298 K and 1 atm and a mass fraction of 0.5 by using the so-called sliding symmetric tubes technique. The results show that the diffusion coefficient at this concentration is proportional to the inverse visco...
In this work the molecular diffusion coefficient of several normal alkane binary mixtures at 50 wt% and 298.15 K has been determined. The measurements have been carried out using the sliding symmetric tubes technique. The studied mixtures have been the ones corresponding to the nC 6-nC i (i= 10,11,12,13,14,15,16,17,18) series. Additionally the dyna...