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| Títol: | Evaluation of the bulk and alpha-case layer properties in Ti-6Al-4V at micro- and nano-metric length scale |
|---|---|
| Autor/a: | Sefer, Birhan; Roa Rovira, Joan Josep; Mateo García, Antonio Manuel; PEDERSON, R; Antti, Marta-Lena |
| Altres autors: | Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Micromecànica i Fiabilitat dels Materials |
| Abstract: | In the present study the hardness of individual alpha ( )-Ti grains in Ti-6Al-4V was measured by nanoindentation using Berkovich tip indenter. Additionally, alpha-case layer was induced by performing isothermal heat treatment at 700 °C in air for 500 hours. The average hardness of the -Ti grains found in the bulk material and in the alpha-case layer were 6.7 ± 0.7 GPa and 9.4 ± 1.4 GPa, respectively. The high hardness of the -Ti grains in the alpha-case layer is due to solid solution strengthening caused by interstitial oxygen diffusion. The thickness of the developed alpha-case layer was estimated metallographically and compared with that measured from a hardness profile performed along the layer. Moreover, electron back-scattered diffraction was used to determine the local crystallographic orientation, the texture of the alloy microstructure, as well as phase fraction changes, where the nanoindentation measurements were performed. |
| Matèries: | -Àrees temàtiques de la UPC::Enginyeria dels materials -Titanium alloys -Nanocomposites (Materials) -Titanium alloy -Heat treatment -Alpha-case layer -Hardness -Nanoindentation -Electron Back-scattered diffraction -Phase transformation -Titani -- Aliatges -Nanocompòsits (Materials) -- Propietats mecàniques |
| Drets: | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
| Tipus de document: | Article - Versió publicada Capítol o part de llibre |
| Publicat per: | WILEY |
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