Influencia del arenado de la aleación Ti6Al4V en la dureza subsuperficial y estado de tensiones residuales

Multigner, M.; Fernández-Castrillo, P.; Ferreira-Barragáns, Silvia; González-Doncel, Gaspar; González-Carrasco, José Luis

doi:10.3989/revmetalm.0803

Cited by 12 publications

(12 citation statements)

References 14 publications

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“…Determination of the stress state, as well as its magnitude and its depth, which extends inside the material, has been traditionally done by diffraction techniques such as X-ray [9,10] or synchrotron radiation [11][12][13]. More recently, several methods have been developed for the determination of residual stresses through the analysis of load-displacement data, often referred to as the load-penetration depth curve, obtained using instrumented indentation techniques.…”

Section: Introductionmentioning

confidence: 99%

Novel approaches to determining residual stresses by ultramicroindentation techniques: Application to sandblasted austenitic stainless steel

2010

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This research addresses the determination of residual stresses in sandblasted austenitic steel by ultramicroindentation techniques using a sharp indenter, of which the sensitivity to residual stress effects is said to be inferior to that of spherical ones. The introduction of an angular correction in the model of Wang et al. which relates variations in the maximum load to the presence of residual stresses is proposed. Similarly, the contribution to the hardness of grain size refinement and work hardening, developed as a consequence of the severe plastic deformation during blasting, is determined in order to avoid overestimation of the residual stresses. Measurements were performed on polished cross sections along a length of several microns, thus obtaining a profile of the residual stresses. Results show good agreement with those obtained by synchrotron radiation on the same specimens, which validates the method and demonstrates that microindentation using sharp indenters may be sensitive to the residual stress effect.

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Section: Introductionmentioning

confidence: 99%

Novel approaches to determining residual stresses by ultramicroindentation techniques: Application to sandblasted austenitic stainless steel

2010

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“…X-ray mapping confirm they are Alrich oxides, obviously remnants of the jet of particles used for blasting. A transfer of the blasting material onto the metal surface is usually reported [5,7,17]. From the analysis of the imprints in representative SEM images it follows that shape of the grit particles used to blast BL1and BL2 specimens might have been different.…”

Section: Resultsmentioning

confidence: 99%

“…Such hardening has been also observed in grit blasted austenitic stainless steel 316 L [13]. However, data in the open literature on the sub-surface hardening of Ti6Al4V following grit blasting are scarce and limited to previous works that indicates the absence of an evident hardening [7,8,14]. In this work we investigate Ti6Al4V disks which surface was modified by a grit blasting process used to get fine roughened surfaces on implant components.…”

Section: Introductionmentioning

confidence: 88%

“…In addition, the treatment induces microstructural changes in a thin zone beneath the blasted surface and leaves compressive residual stresses with a maximum value close to the surface [4,[6][7][8][9]. It could be expected that this compressive stress state would delay crack initiation and/or slow down crack propagation resulting in an increased fatigue resistance.…”

Section: Introductionmentioning

confidence: 99%

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Interrogations on the sub-surface strain hardening of grit blasted Ti–6Al–4V alloy

Multigner

Frutos

Mera

et al. 2009

Surface and Coatings Technology

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“…En este orden de ideas, el desarrollo de técni-cas como el tratamiento superficial con soluciones químicas, la oxidación anódica, el uso de recubrimientos cerámicos y/o poliméricos, la implantación iónica, la modificación de la rugosidad mediante micro y nano indentación, entre otras, permiten activar químicamente la superficie del biomaterial frente al medio biológico, lo cual genera las condiciones adecuadas para garantizar el proceso de osteointegración (Xuanyong et al, 2004;Peón et al, 2005;Multigner et al, 2009;Paz et al, 2011;Tojal et al, 2013).…”

Section: Introductionunclassified

Obtención, caracterización y evaluación in vitro de recubrimientos de policaprolactona-quitosano sobre la aleación Ti6Al4V tratada químicamente

Rodríguez¹,

Quintero-Jaime²,

Ballesteros³

et al. 2014

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RESUMEN:Se obtuvieron recubrimientos poliméricos de policaprolactona-quitosano, aplicados mediante la técnica Dip-Coating, sobre sustratos de Ti6Al4V tratados químicamente con NaOH. Con base en los análisis SEM y los espectros infrarrojos, se observó que la cantidad de policaprolactona en el recubrimiento presentó un efecto en la retención de quitosano en la superficie, relacionado con la emisión del enlace R-OH y las características morfológicas. Los espectros de impedancia realizados a las películas poliméricas, mostraron procesos relacionados con fenómenos de adsorción de especies iónicas hasta la formación de monocapas en la superficie. Igualmente, estos espectros mostraron fenómenos de transferencia de carga generados por las características morfológicas de los recubrimientos, como sus porosidades, densidad y homogeneidad. La inmersión de los sustratos recubiertos en una solución SBF durante 8 días, permitió observar su capacidad de adsorción de calcio mediante la nucleación y precipitación de fosfatos de calcio, mostrando un carácter bioactivo frente al medio. ABSTRACT: Obtention, characterization and in vitro evaluation of polycaprolactone-chitosan coatings growth on chemically treated Ti6Al4V alloy. Polymeric coatings were obtained polycaprolactone-chitosan. The coatings were applied by dip-coating technique, on Ti6Al4V substrates chemically treated with NaOH solution. Based on SEM morphological analysis and infrared spectra, it was observed that the amount of polycaprolactone in the coating obtained had an effect in retaining the chitosan on the surface, associated with the emission of R-OH bond and the morphological characteristics. Impedance spectra performed on the polymeric films showed phenomena related processes adsorption of ionic species to monolayer formation on the surface. These spectra showed equally charge transfer phenomena generated by the morphological characteristics of the coatings, such as its porosity, density and homogeneity. The coated substrate was immersing in SBF solution for 8 days, allowed to observe its adsorption capacity of calcium through nucleation and precipitation of calcium phosphates, bioactive character displaying a front medium.

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Influencia del arenado de la aleación Ti6Al4V en la dureza subsuperficial y estado de tensiones residuales

Cited by 12 publications

References 14 publications

Novel approaches to determining residual stresses by ultramicroindentation techniques: Application to sandblasted austenitic stainless steel

Novel approaches to determining residual stresses by ultramicroindentation techniques: Application to sandblasted austenitic stainless steel

Interrogations on the sub-surface strain hardening of grit blasted Ti–6Al–4V alloy

Obtención, caracterización y evaluación in vitro de recubrimientos de policaprolactona-quitosano sobre la aleación Ti6Al4V tratada químicamente

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