About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation and Damage Mechanisms of High Temperature Alloys
|
Presentation Title |
Slip Localization and the Prediction of Fatigue Strength of Polycrystalline Alloys |
Author(s) |
J.C. Stinville, M.A. Charpagne, A. Cervellon, S. Hémery, F. Wang, P.G. Callahan, V. Valle, T.M. Pollock |
On-Site Speaker (Planned) |
J.C. Stinville |
Abstract Scope |
With increasing applied stress, metallic materials experience irreversible deformation, manifested in localized slip events that result in unexpected fatigue failure upon repeated cycling. Recent advances in accelerated fatigue testing, in-situ electron microscopy, digital image correlation methods and multi-modal data analysis have been integrated to quantitatively characterize the evolution of these slip events from the earliest stages of cycling at the nanometer scale over large fields of view in relation to material structure. Statistical analyses of slip events for a large collection of materials with face-centered cubic, hexagonal close-packed and body-centered cubic structures have been performed. Relations between the yield and ultimate tensile strength, cyclic fatigue strength and the amplitude and spacing of slip localization events are uncovered. It is observed for the first time that the fatigue strength of fcc, hcp and bcc metallic alloys can be predicted by the amplitude of slip localization during the first cycle of loading. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Other, High-Temperature Materials |