Thermoelectric assessment of laser peening induced effects on a metallic biomedical Ti6Al4V

Carreón, H.; Barriuso, S.; Porro González, Juan Antonio; González-Carrasco, J. L. y Ocaña Moreno, José Luis (2014). Thermoelectric assessment of laser peening induced effects on a metallic biomedical Ti6Al4V. En: "Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIV", ., San Francisco. ISBN 9780819498854. pp..

Descripción

Título: Thermoelectric assessment of laser peening induced effects on a metallic biomedical Ti6Al4V
Autor/es:
  • Carreón, H.
  • Barriuso, S.
  • Porro González, Juan Antonio
  • González-Carrasco, J. L.
  • Ocaña Moreno, José Luis
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIV
Fechas del Evento: .
Lugar del Evento: San Francisco
Título del Libro: Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIV
Fecha: 2014
ISBN: 9780819498854
Volumen: 8972
Materias:
Palabras Clave Informales: Laser shock peening; Thermoelectric Measurements; Ti-6Al-4V; Biomaterial
Escuela: E.T.S.I. Industriales (UPM)
Departamento: Física Aplicada e Ingeniería de Materiales
Licencias Creative Commons: Ninguna

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Resumen

Laser peening has recently emerged as a useful technique to overcome detrimental effects associated to another well-known surface modification processes such as shot peening or grit blasting used in the biomedical field. It is worth to notice that besides the primary residual stress effect, thermally induced effects might also cause subtle surface and subsurface microstructural changes that might influence corrosion resistance. Moreover, since maximum loads use to occur at the surface, they could also play a critical role in the fatigue strength. In this work, plates of Ti-6Al-4V alloy of 7 mm in thickness were modified by laser peening without using a sacrificial outer layer. Irradiation by a Q-switched Nd-YAG laser (9.4 ns pulse length) working in fundamental harmonic at 2.8 J/pulse and with water as confining medium was used. Laser pulses with a 1.5 mm diameter at an equivalent overlapping density (EOD) of 5000 cm-2 were applied. Attempts to analyze the global induced effects after laser peening were addressed by using the contacting and non-contacting thermoelectric power (TEP) techniques. It was demonstrated that the thermoelectric method is entirely insensitive to surface topography while it is uniquely sensitive to subtle variations in thermoelectric properties, which are associated with the different material effects induced by different surface modification treatments. These results indicate that the stress-dependence of the thermoelectric power in metals produces sufficient contrast to detect and quantitatively characterize regions under compressive residual stress based on their thermoelectric power contrast with respect to the surrounding intact material. However, further research is needed to better separate residual stress effects from secondary material effects, especially in the case of low-conductivity engineering materials like titanium alloys.

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
Gobierno de EspañaMAT2009-14695-C04Sin especificarSin especificarSin especificar
Gobierno de EspañaMAT 2012-37736-C05-01Sin especificarSin especificarSin especificar
Gobierno de EspañaMAT 2012-37782Sin especificarSin especificarSin especificar

Más información

ID de Registro: 37009
Identificador DC: http://oa.upm.es/37009/
Identificador OAI: oai:oa.upm.es:37009
URL Oficial: http://spie.org/Publications/Proceedings/Volume/8972
Depositado por: Memoria Investigacion
Depositado el: 31 Mar 2016 15:04
Ultima Modificación: 03 Mar 2017 19:30
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