|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||A Study of Local Rate Sensitivity in Dual-phase Ti Alloys by Micropillar Compression and CPFE Modelling
||Tea-Sung Jun, Zhen Zhang, Fionn Dunne, Ben Britton
|On-Site Speaker (Planned)
Understanding the fundamental mechanisms of deformation, including local rate sensitivity, in industrial Ti alloys is critical to assessing and quantifying the cold dwell fatigue phenomenon, which significantly reduces the useful life of structural load bearing components in aeroengines. We have employed an in-situ micropillar compression technique to evaluate rate sensitivities of the differing HCP slip systems in dwell sensitive Ti-6Al-2Sn-4Zr-2Mo and dwell insensitive Ti-6Al-2Sn-4Zr-6Mo alloys and to explore load-relaxation and rate dependent deformation of individual slip systems. To complement and aid interpretation of these experiments we have performed crystal plasticity finite element (CPFE) modelling, with the aim of gaining physical insight into these important micromechanical dwell fatigue mechanisms. We present our combined measurements and comparative observations of the different rate sensitivities of individual slip systems in these alloys.
||Planned: EPD Congress Volume