|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||Fatigue Damage Precursor Effects on the Dynamic Properties of α-Iron
||Joseph Indeck, Cyril Williams, Kavan Hazeli
|On-Site Speaker (Planned)
This work investigates the effect of pre-existing fatigue damage on the high strain-rate deformation response of α-Iron. Inducing pre-existing damage is important because it provides pertinent data on the dynamic behavior of a material that has undergone repeated loadings. The bulk of dynamic deformation studies commonly use pristine samples to study the dynamic response. However, in most instances, components will have been in service prior to being exposed to any dynamic event such as a high velocity impact. In this set of experiments, the pristine α-Iron is subjected to intermediate-cycle fatigue (ICF) using a servo-hydraulic MTS, then compressed using a Kolsky bar (Split-Hopkinson Pressure Bar) at strain rates approximately 10^3 s^-1. Each Kolsky bar sample is machined with electrical discharge machining (EDM) from the gauge section of the fatigued specimens. This series of tests will demonstrate how a fatigued material with existing damage responds to dynamic loading.
||Planned: Supplemental Proceedings volume