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  4. Toward predictive understanding of fatigue crack nucleation in Ni-based Superalloys
 
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Toward predictive understanding of fatigue crack nucleation in Ni-based Superalloys
File(s)
art%3A10.1007%2Fs11837-017-2307-9.pdf (2.22 MB)
Published version
Author(s)
Jiang, J
Dunne, F
Britton, T
Type
Journal Article
Abstract
Predicting when and where materials fail is a holy grail for structural materials engineering. Development of a predictive capability in this domain will optimize the employment of existing materials, as well as rapidly enhance the uptake of new materials, especially in high-risk, high-value applications, such as aeroengines. In this article, we review and outline recent efforts within our research groups that focus on utilizing full-field measurement and calculation of micromechanical deformation in Ni-based superalloys. In paticular, we employ high spatial resolution digital image correlation (HR-DIC) to measure surface strains and a high-angular resolution electron backscatter diffraction technique (HR-EBSD) to measure elastic distortion, and we combine these with crystal plasticity finite element (CPFE) modeling. We target our studies within a system of samples that includes single, oligo, and polycrystals where the boundary conditions, microstructure, and loading configuration are precisely controlled. Coupling of experiment and simulation in this manner enables enhanced understanding of crystal plasticity, as demonstrated with case studies in deformation compatibility; spatial distributions of slip evolution; deformation patterning around microstructural defects; and ultimately development of predictive capability that probes the location of microstructurally sensitive fatigue cracks. We believe that these studies present a careful calibration and validation of our experimental and simulation-based approaches and pave the way toward new understanding of crack formation in engineering alloys.
Date Issued
2017-03-24
Date Acceptance
2017-02-24
Citation
JOM, 2017, 69 (5), pp.863-871
URI
http://hdl.handle.net/10044/1/45019
DOI
https://www.dx.doi.org/10.1007/s11837-017-2307-9
ISSN
1047-4838
Publisher
Springer Verlag (Germany)
Start Page
863
End Page
871
Journal / Book Title
JOM
Volume
69
Issue
5
Copyright Statement
© The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Sponsor
Beijing Institute of Aeronautical Materials (BIAM)
Royal Academy Of Engineering
Royal Academy Of Engineering
Rolls-Royce Plc
Grant Number
N/A
RF/129
MMRE_P54661
5200041317
Subjects
Science & Technology
Technology
Physical Sciences
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Mineralogy
Mining & Mineral Processing
Materials Science
ELECTRON BACKSCATTER DIFFRACTION
DIGITAL IMAGE CORRELATION
CRYSTAL PLASTICITY
INCLUSIONS
DISLOCATIONS
DEFORMATION
BOUNDARIES
ALLOYS
SIZE
0913 Mechanical Engineering
0914 Resources Engineering And Extractive Metallurgy
0912 Materials Engineering
Materials
Publication Status
Published
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