TY - JOUR
T1 - 3D Time-Resolved Observations of Fatigue Crack Initiation and Growth from Corrosion Pits in Al 7XXX Alloys Using In Situ Synchrotron X-ray Tomography
AU - Singaravelu, Arun Sundar Sundaram
AU - Williams, Jason J.
AU - Goyal, Harsh Dev
AU - Niverty, Sridhar
AU - Singh, Sudhanshu S.
AU - Stannard, Tyler J.
AU - Xiao, Xianghui
AU - Chawla, Nikhilesh
N1 - Funding Information:
The authors are grateful for financial support from the Office of Naval Research (ONR) under Contract No. N00014-10-1-0350 (Drs. A. K. Vasudevan and W. Mullins, Program Managers). TJS acknowledges support from the National Science Foundation Graduate Research Fellowship Program under Grant No. DGE 1311230. We gratefully acknowledge the use of facilities within the LeRoy Eyring Center for Solid State Science and the Center for 4D Materials Science at Arizona State University. We also gratefully acknowledge the use of resources at Beamline 2-BM of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
Funding Information:
The authors are grateful for financial support from the Office of Naval Research (ONR) under Contract No. N00014-10-1-0350 (Drs. A. K. Vasudevan and W. Mullins, Program Managers). TJS acknowledges support from the National Science Foundation Graduate Research Fellowship Program under Grant No. DGE 1311230. We gratefully acknowledge the use of facilities within the LeRoy Eyring Center for Solid State Science and the Center for 4D Materials Science at Arizona State University. We also gratefully acknowledge the use of resources at Beamline 2-BM of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Publisher Copyright:
© 2019, The Minerals, Metals & Materials Society and ASM International.
PY - 2020/1/1
Y1 - 2020/1/1
N2 - In situ three-dimensional X-ray synchrotron tomography was used to visualize and quantify the fatigue crack initiation and growth from corrosion pits in high strength aluminum alloys. Corrosion pitted Al 7075 and Al 7475 samples of peak-aged, over-aged, and highly over-aged conditions were prepared by soaking in 3.5 wt pct NaCl solution for fifteen days. These samples were fatigue tested in situ in 3.5 wt pct NaCl solution using synchrotron X-ray tomography to analyze the fatigue crack initiation and growth characteristics (4D). Increases in maximum pit depth and fatigue crack growth rate variability were found with increased aging. A detailed analysis of crack morphology and deflection, as a function of aging, was carried out and it discussed.
AB - In situ three-dimensional X-ray synchrotron tomography was used to visualize and quantify the fatigue crack initiation and growth from corrosion pits in high strength aluminum alloys. Corrosion pitted Al 7075 and Al 7475 samples of peak-aged, over-aged, and highly over-aged conditions were prepared by soaking in 3.5 wt pct NaCl solution for fifteen days. These samples were fatigue tested in situ in 3.5 wt pct NaCl solution using synchrotron X-ray tomography to analyze the fatigue crack initiation and growth characteristics (4D). Increases in maximum pit depth and fatigue crack growth rate variability were found with increased aging. A detailed analysis of crack morphology and deflection, as a function of aging, was carried out and it discussed.
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U2 - 10.1007/s11661-019-05519-z
DO - 10.1007/s11661-019-05519-z
M3 - Article
AN - SCOPUS:85074826576
SN - 1073-5623
VL - 51
SP - 28
EP - 41
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 1
ER -