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Title: Evidence that abnormal grain growth precedes fatigue crack initiation in nanocrystalline Ni-Fe

Abstract

Prior studies on the high-cycle fatigue behavior of nanocrystalline metals have shown that fatigue fracture is associated with abnormal grain growth (AGG). However, those previous studies have been unable to determine if AGG precedes fatigue crack initiation, or vice-versa. The present study shows that AGG indeed occurs prior to crack formation in nanocrystalline Ni-Fe by using a recently developed synchrotron X-ray diffraction modality that has been adapted for in-situ analysis. The technique allows fatigue tests to be interrupted at the initial signs of the AGG process, and subsequent microscopy reveals the precursor damage state preceding crack initiation.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1379978
Alternate Identifier(s):
OSTI ID: 1398778
Report Number(s):
SAND-2017-9766J
Journal ID: ISSN 1359-6462; S1359646217305110; PII: S1359646217305110
Grant/Contract Number:  
AC02-76SF00515; AC04-94AL85000; NA0003525
Resource Type:
Published Article
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Name: Scripta Materialia Journal Volume: 143 Journal Issue: C; Journal ID: ISSN 1359-6462
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; Nanocrystalline; Fatigue; Fracture; Nanostructure; X-ray diffraction

Citation Formats

Furnish, Timothy A., Bufford, Daniel C., Ren, Fang, Mehta, Apurva, Hattar, Khalid, and Boyce, Brad L. Evidence that abnormal grain growth precedes fatigue crack initiation in nanocrystalline Ni-Fe. United States: N. p., 2018. Web. doi:10.1016/j.scriptamat.2017.08.047.
Furnish, Timothy A., Bufford, Daniel C., Ren, Fang, Mehta, Apurva, Hattar, Khalid, & Boyce, Brad L. Evidence that abnormal grain growth precedes fatigue crack initiation in nanocrystalline Ni-Fe. United States. https://doi.org/10.1016/j.scriptamat.2017.08.047
Furnish, Timothy A., Bufford, Daniel C., Ren, Fang, Mehta, Apurva, Hattar, Khalid, and Boyce, Brad L. Mon . "Evidence that abnormal grain growth precedes fatigue crack initiation in nanocrystalline Ni-Fe". United States. https://doi.org/10.1016/j.scriptamat.2017.08.047.
@article{osti_1379978,
title = {Evidence that abnormal grain growth precedes fatigue crack initiation in nanocrystalline Ni-Fe},
author = {Furnish, Timothy A. and Bufford, Daniel C. and Ren, Fang and Mehta, Apurva and Hattar, Khalid and Boyce, Brad L.},
abstractNote = {Prior studies on the high-cycle fatigue behavior of nanocrystalline metals have shown that fatigue fracture is associated with abnormal grain growth (AGG). However, those previous studies have been unable to determine if AGG precedes fatigue crack initiation, or vice-versa. The present study shows that AGG indeed occurs prior to crack formation in nanocrystalline Ni-Fe by using a recently developed synchrotron X-ray diffraction modality that has been adapted for in-situ analysis. The technique allows fatigue tests to be interrupted at the initial signs of the AGG process, and subsequent microscopy reveals the precursor damage state preceding crack initiation.},
doi = {10.1016/j.scriptamat.2017.08.047},
journal = {Scripta Materialia},
number = C,
volume = 143,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2018},
month = {Mon Jan 01 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text

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Cited by: 14 works
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