Effect of mechanical surface treatments on the high temperature oxidation of pure titanium: the role of nitrogen
- Resource Type
- Authors
- M. de Lucas; Virgil Optasanu; Manuel François; Tony Montesin; A. Kanjer; Pascal Berger; L. Lavisse; Patrice Peyre; Cyril Gorny
- Source
- MATEC Web of Conferences
MATEC Web of Conferences, 2020, 321, pp.12045. ⟨10.1051/matecconf/202032112045⟩
MATEC Web of Conferences, Vol 321, p 12045 (2020)
MATEC Web of Conferences, EDP sciences, 2020, 321, pp.12045. ⟨10.1051/matecconf/202032112045⟩
- Subject
- 010302 applied physics
Materials science
Oxide
Analytical chemistry
chemistry.chemical_element
Peening
02 engineering and technology
[CHIM.MATE]Chemical Sciences/Material chemistry
021001 nanoscience & nanotechnology
Engineering (General). Civil engineering (General)
01 natural sciences
Oxygen
Nitrogen
Metal
chemistry.chemical_compound
chemistry
visual_art
0103 physical sciences
visual_art.visual_art_medium
TA1-2040
0210 nano-technology
Ductility
Carbon
Titanium
- Language
- English
- ISSN
- 2261-236X
International audience; The mechanically treated high temperature (700°C) oxidation of commercially pure titanium was studied for long exposures (3000 h). The treatments studied here are the shot-peening and the laser-shock peening. The mass gain was measured by discontinued weighing. SEM and Raman imaging revealed strong differences between laser-shock peened, shot-peened and untreated oxidized samples. The laser treatment leads to thin compact and protective oxide layer while the shot-peened and untreated samples exhibit cracked oxide layers. The distribution of light elements like carbon, oxygen and nitrogen was revealed by Ion Beam Analysis. The presence of nitrogen located at the interface between the oxide scale and the metal was revealed on laser-shock peened samples. It is supposed the nitrogen slows-down the oxygen diffusion into the metal. The extent of the oxygen-enriched metal is also smaller on LSP samples, which improves the ductility of titanium.