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Title: Fatigue crack initiation, slip localization and twin boundaries in a nickel-based superalloy

Abstract

The study of fatigue in metals, and fatigue initiation specifically, lends itself to analysis via an emerging set of characterization and modeling tools that describe polycrystals on the meso- or microstructural length scale. These include three-dimensional characterization techniques, elastic anisotropic and visco-plastic stress models, new approaches to the statistical description of stress and strain distributions, synthetic microstructure modeling, and improved tools for manipulating the large datasets generated. A specific example of analysis in both 2D and 3D of fatigue cracks in a nickel-based superalloy is given where all the cracks are effectively coincident with coherent twin boundaries. A spectral method is used to analyze the stress state based on a fully anisotropic elastic calculation. The results indicate that, although a high resolved shear stress is associated with the locations of the observed cracks, the length of the trace of the twin boundary is more strongly correlated with crack formation.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Air Force Research Laboratory (AFRL) - Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF); Air Force Research Laboratory (AFRL)
OSTI Identifier:
1392070
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Current Opinion in Solid State and Materials Science; Journal Volume: 18; Journal Issue: 4
Country of Publication:
United States
Language:
English
Subject:
Crack initiation; superalloy

Citation Formats

Stein, Clayton A., Cerrone, Albert, Ozturk, Tugce, Lee, Sukbin, Kenesei, Peter, Tucker, Harris, Pokharel, Reeju, Lind, Jonathan, Hefferan, Christopher, Suter, Robert M., Ingraffea, Anthony R., and Rollett, Anthony D.. Fatigue crack initiation, slip localization and twin boundaries in a nickel-based superalloy. United States: N. p., 2014. Web. doi:10.1016/j.cossms.2014.06.001.
Stein, Clayton A., Cerrone, Albert, Ozturk, Tugce, Lee, Sukbin, Kenesei, Peter, Tucker, Harris, Pokharel, Reeju, Lind, Jonathan, Hefferan, Christopher, Suter, Robert M., Ingraffea, Anthony R., & Rollett, Anthony D.. Fatigue crack initiation, slip localization and twin boundaries in a nickel-based superalloy. United States. doi:10.1016/j.cossms.2014.06.001.
Stein, Clayton A., Cerrone, Albert, Ozturk, Tugce, Lee, Sukbin, Kenesei, Peter, Tucker, Harris, Pokharel, Reeju, Lind, Jonathan, Hefferan, Christopher, Suter, Robert M., Ingraffea, Anthony R., and Rollett, Anthony D.. Fri . "Fatigue crack initiation, slip localization and twin boundaries in a nickel-based superalloy". United States. doi:10.1016/j.cossms.2014.06.001.
@article{osti_1392070,
title = {Fatigue crack initiation, slip localization and twin boundaries in a nickel-based superalloy},
author = {Stein, Clayton A. and Cerrone, Albert and Ozturk, Tugce and Lee, Sukbin and Kenesei, Peter and Tucker, Harris and Pokharel, Reeju and Lind, Jonathan and Hefferan, Christopher and Suter, Robert M. and Ingraffea, Anthony R. and Rollett, Anthony D.},
abstractNote = {The study of fatigue in metals, and fatigue initiation specifically, lends itself to analysis via an emerging set of characterization and modeling tools that describe polycrystals on the meso- or microstructural length scale. These include three-dimensional characterization techniques, elastic anisotropic and visco-plastic stress models, new approaches to the statistical description of stress and strain distributions, synthetic microstructure modeling, and improved tools for manipulating the large datasets generated. A specific example of analysis in both 2D and 3D of fatigue cracks in a nickel-based superalloy is given where all the cracks are effectively coincident with coherent twin boundaries. A spectral method is used to analyze the stress state based on a fully anisotropic elastic calculation. The results indicate that, although a high resolved shear stress is associated with the locations of the observed cracks, the length of the trace of the twin boundary is more strongly correlated with crack formation.},
doi = {10.1016/j.cossms.2014.06.001},
journal = {Current Opinion in Solid State and Materials Science},
number = 4,
volume = 18,
place = {United States},
year = {Fri Aug 01 00:00:00 EDT 2014},
month = {Fri Aug 01 00:00:00 EDT 2014}
}