Bauschinger effect and latent hardening under cyclic micro-bending of Ni-base Alloy 718 single crystals: Part I. Experimental analysis of single and multi slip plasticity
- Cyclic micro-bending tests on fcc single crystal Ni-base Alloy 718 cantilevers with different crystal orientations were performed to analyze the influence of activated slip systems on dislocation plasticity, latent hardening and the Bauschinger effect. The investigations indicate that plasticity in single crystal micro-cantilevers is significantly influenced by two phenomena - dislocationCyclic micro-bending tests on fcc single crystal Ni-base Alloy 718 cantilevers with different crystal orientations were performed to analyze the influence of activated slip systems on dislocation plasticity, latent hardening and the Bauschinger effect. The investigations indicate that plasticity in single crystal micro-cantilevers is significantly influenced by two phenomena - dislocation interaction and dislocation pile-up at the neutral plane. Both phenomena occur at the same time. Their ratio seems to be determined by the activated slip systems. Slip trace analysis indicates that the activation of only one slip system leads to a strong localization of plasticity to a limited number of parallel slip bands. This results in low dislocation interaction and consequently pronounced pile-ups at the neutral plane. In multi slip orientation, the second slip system leads to activation of significantly more dislocation sources, causing a much earlier and more homogeneous elastic-plastic transition zone. In stress-strain hysteresis loops during bending, pronounced dislocation interaction in multi slip orientation leads to a more pronounced latent hardening. The results suggest that on a microstructural length scale, plasticity behavior is strongly affected by activated slip systems, which determine local dislocation phenomena. Based on the results presented in this paper, a finite element analysis of latent hardening and the Bauschinger effect using a single crystal plasticity model with latent kinematic hardening is presented in Part II.…
Document Type: | Article (reviewed) |
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Zitierlink: | https://opus.hs-offenburg.de/5177 | Bibliografische Angaben |
Title (English): | Bauschinger effect and latent hardening under cyclic micro-bending of Ni-base Alloy 718 single crystals: Part I. Experimental analysis of single and multi slip plasticity |
Author: | Marion Kreins, Simon SchilliStaff MemberGND, Thomas SeifertStaff MemberORCiDGND, Anand Iyer, Magnus Hörnqvist Colliander, Sebastian Wesselmecking, Ulrich Krupp |
Year of Publication: | 2021 |
Publisher: | Elsevier |
Page Number: | 12 |
First Page: | 1 |
Last Page: | 12 |
Article Number: | 142027 |
Parent Title (English): | Materials Science and Engineering: A |
Volume: | 827 |
ISSN: | 0921-5093 (Print) |
ISSN: | 1873-4936 (Online) |
DOI: | https://doi.org/10.1016/j.msea.2021.142027 |
URL: | https://www.sciencedirect.com/science/article/abs/pii/S0921509321012922 |
Language: | English | Inhaltliche Informationen |
Institutes: | Fakultät Maschinenbau und Verfahrenstechnik (M+V) |
Institutes: | Bibliografie |
Tag: | Bauschinger effect; Cyclic micro-bending; Latent kinematic hardening; Nickel-based superalloys; Single crystal plasticity; Slip trace analysis | Formale Angaben |
Open Access: | Closed Access |
Licence (German): | Urheberrechtlich geschützt |