Journal
ACTA MATERIALIA
Volume 158, Issue -, Pages 138-154Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2018.07.033
Keywords
Autocorrelation; Cubic microstructure; Image analysis; Fabric tensor; Orowan stress; Rafting
Funding
- CASCADE program
- ACE
- CENAERO
- DPS
- GD-TECH
- INTES
- PHIMECA
- SAFRAN Helicopter Engines
- Valeo
- CEA
- CER-FACS
- ENSAM Paris
- LMT Cachan
- Institut Pprime/ISAE-ENSMA under project FSN Calcul Intensif et Simulation Numerique by DGE [P3682-147191]
Ask authors/readers for more resources
Our work aims at providing a tensorial analysis of directional gamma' rafting state in a nickel based single crystal superalloy, for several orientations. According to a visco-plasticity modeling accounting for microstructure evolution during creep (including rafting), different -even- order fabric tensor representations are provided, respectively for gamma channel width, primary gamma' cuboidal particles and microstructure periodicity lambda. Several image processing algorithms are presented and used to best measure these quantities, particularly the AutoCorrelation Method (ACM) and the Rotational Intercept Method (RIM). Each method is developed for a specific purpose: the AutoCorrelation Method yields information about principal directions and pattern periodicity, while RIM method provides a polar distribution of a physical quantity. A methodology is proposed and applied to measure the Rose diagrams and the corresponding fabric tensors of order 2, 4, 6 and 8, starting by the best fitting Fourier series coefficients of the experimental data. When RIM method is possible to apply, fabric tensors up to order 8 are considered. In any case a 2nd order tensor representation of single crystals gamma' rafting state is provided. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available