|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Advances in Titanium Technology
||Nanoindentation Properties Evolution of Titanium with Different Oxygen Contents
||Damien Texier, Quentin Sirvin, Charles Romain, Henry Proudhon, Vladislav Yastrebov, Samuel Forest, Marc Legros
|On-Site Speaker (Planned)
Ti-based alloys are excellent candidates for intermediate temperature applications due to high specific mechanical properties. However, the high solubility of oxygen in Ti at such temperatures makes Ti-based alloys particularly prone to oxygen dissolution and embrittlement. The oxygen rich layer (ORL), generally thicker than the external oxide scale, can extend over micrometers to tens of micrometers. The ORL is highly detrimental for the mechanical integrity of thin components. Therefore, assessing the local mechanical behavior at the sub-grain level and at the sub-ORL level is important to better understand the heterogeneous and anisotropic mechanical response of Ti as a function of the grain orientation and the local oxygen content. Large and high resolution nanoindentation maps were conducted using continuous stiffness measurement techniques and the reduced moduli and hardness measurements were correlated to EBSD and chemical data. Conventional nanoindentation tests were performed to investigate pop-in events within the oxygen-rich layer.
||Titanium, Environmental Effects, Mechanical Properties