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Communication Dans Un Congrès Année : 2023

Oxygen content effect on mechanical behaviour of cp titanium exposed at elevated temperature.

Quentin Sirvin
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Damien Texier
Vincent Velay
Benjamin Dod
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Résumé

Ti-based alloys are particularly prone to oxygen dissolution and embrittlement. Oxygen solubility within titanium leads to the formation of an oxygen-diffusion zone (ODZ) during oxidation processes for a depth up to ten times thicker than the oxide layer. The mechanical and oxidation behaviour of the CP-Ti was investigated using micro-tensile testing of 50 to 800 μm-thick pre-oxidized specimens. Pre-oxidation treatments at 700 °C with various exposures have been performed to generate different ODZ thickness/non-affected material (NAM) thickness ratios ranging from 0 to 100%. These investigations aimed to identify the competition between strengthening effects due to oxygen enrichment and the damage development due to oxygen embrittlement using the graded-property material structure composed of different percentages of NAM and ODZ. Mechanical properties of CP-Ti rise with oxidation time except for strain to failure. The extension of the ODZ follow parabolic law with a parabolic constant 20 μm².h-1.
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Dates et versions

hal-04166161 , version 1 (19-07-2023)

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  • HAL Id : hal-04166161 , version 1

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Quentin Sirvin, Damien Texier, Vincent Velay, Daniel Monceau, Benjamin Dod. Oxygen content effect on mechanical behaviour of cp titanium exposed at elevated temperature.. Ti-2023-World Titanium Conference 2023, Jun 2023, Edinburgh, United Kingdom. ⟨hal-04166161⟩
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