|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||Strain Localisation Behaviour in Ti834 Subjected to Cold Creep Testing
||Claudius Dichtl, Michael Preuss, João Quinta da Fonseca
|On-Site Speaker (Planned)
The near-α titanium alloy TIMETAL® 834 was developed for application in jet engines compressors, reaching temperatures in excess of 600°C. However, this alloy is known to be susceptible to cold-dwell-fatigue, which is particularly important during take-off when peak stresses are reached at low temperatures. Cold creep is assumed to be an underlying deformation mechanism for this material response. In this work, High Resolution Digital Image Correlation (HRDIC) is used to analyse strain localisation behaviour during initial loading and cold creep. Material with different degrees of microtexture, lamella spacing and colony size has been analysed. HRDIC was performed in-situ at 70%, 80%, 90% and 100% of the yield stress and then cold creep testing was performed at constant loads for different holding times, revealing the development of strain distribution with time. The HRDIC strain maps were subsequently cross-correlated with orientation data to link the strain response to the underlying microstructure.
||Planned: Supplemental Proceedings volume