Special Section on Laser Damage II

Characterization of laser peening-induced effects on a biomedical Ti6Al4V alloy by thermoelectric means

[+] Author Affiliations
Hector Carreón

Instituto de Investigaciones Metalúrgicas, UMSNH-IIM, Edif. “U” C.U., 58000-888 Morelia, Mexico

Sandra Barriuso

Centro Nacional de Investigaciones Metalúrgicas, CENIM-CSIC, Avenida Gregorio del Amo 8, 28040 Madrid, Spain

Juan Antonio Porro

Universidad Politécnica de Madrid, Ctr. Láser UPM, 28040 Madrid, Spain

Jose Luis González-Carrasco

Centro Nacional de Investigaciones Metalúrgicas, CENIM-CSIC, Avenida Gregorio del Amo 8, 28040 Madrid, Spain

Centro Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina, 28029 Madrid, Spain

José Luis Ocaña

Universidad Politécnica de Madrid, Ctr. Láser UPM, 28040 Madrid, Spain

Opt. Eng. 53(12), 122502 (Jun 11, 2014). doi:10.1117/1.OE.53.12.122502
History: Received January 29, 2014; Revised March 21, 2014; Accepted April 8, 2014
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Abstract.  Laser peening has recently emerged as a useful technique to overcome detrimental effects associated with other well-known surface modification processes such as shot peening or grit blasting used in the biomedical field. It is worthwhile 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 and fatigue strength of structural components. 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 at the fundamental 1064-nm wavelength at 2.8J/pulse and with water as a confining medium was used. Laser pulses with a 1.5-mm diameter at an equivalent overlapping density of 5000cm2 were applied. Attempts to analyze the global-induced effects after laser peening were addressed by using the contacting and noncontacting thermoelectric power techniques.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Hector Carreón ; Sandra Barriuso ; Juan Antonio Porro ; Jose Luis González-Carrasco and José Luis Ocaña
"Characterization of laser peening-induced effects on a biomedical Ti6Al4V alloy by thermoelectric means", Opt. Eng. 53(12), 122502 (Jun 11, 2014). ; http://dx.doi.org/10.1117/1.OE.53.12.122502


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