|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||Influence of Slip System Hardening on the Development of Heterogeneous Intragrain Deformation during Cyclic Loading with Correlation to Diffraction Peak Broadening
||Robert Carson, Paul Dawson
|On-Site Speaker (Planned)
Within the fatigue life of metals, systems of persistent slip networks (PSNs) are being examined as a possible source for microcrack initiation within polycrystalline metals. A critical capability is to be able to relate the presence of PSNs to experimentally observable broadening of diffraction patterns based on the computed distributions of elastic strain and crystallographic lattice misorientation. High energy x-ray diffraction experiments on a fully reversed cyclically loaded OMC copper have shown across all grains an asymmetric development of intragrain misorientation spread being biased towards compression. To inform the experiments of the heterogeneity of slip activities' influence on peak broadening, various finite-element simulations based on single crystal elasto-viscoplastic theory using a modified Voce harding law are being used. This talk will explore the effects that varying the strength of interactions between slip systems with like slip planes has on the development of this asymmetric intragrain misorientation spread across all grains.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)