Detection of Fatigue Damage Prior to Crack Initiation withScanning SQUID Microscopy

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The remanence fields of fatigued ferritic steel specimens were measured using a scanning microscope based on a high transition temperature Superconducting Quantum Interference Device (SQUID). The results show an overall increase of remanence until dislocation density saturates and an additional local remanence increase after saturation during cyclic loading. Because of the combined magnetic and spatial resolution of the SQUID microscope, these local changes of dislocation structures can be detected before a crack actually initiates, and identify the sites where crack nucleation will occur.

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Lee, Tae-Kyu; Morris Jr., J.W.; Lee, Seungkyun & Clarke, John November 7, 2005.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 11 times , with 11 in the last month . More information about this article can be viewed below.

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The remanence fields of fatigued ferritic steel specimens were measured using a scanning microscope based on a high transition temperature Superconducting Quantum Interference Device (SQUID). The results show an overall increase of remanence until dislocation density saturates and an additional local remanence increase after saturation during cyclic loading. Because of the combined magnetic and spatial resolution of the SQUID microscope, these local changes of dislocation structures can be detected before a crack actually initiates, and identify the sites where crack nucleation will occur.

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  • Journal Name: Review of Progress in Quantitative NondestructiveEvaluation; Journal Volume: 820; Related Information: Journal Publication Date: 2006

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  • Report No.: LBNL--59250
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 903041
  • Archival Resource Key: ark:/67531/metadc886377

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • November 7, 2005

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Sept. 29, 2016, 2:25 p.m.

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Lee, Tae-Kyu; Morris Jr., J.W.; Lee, Seungkyun & Clarke, John. Detection of Fatigue Damage Prior to Crack Initiation withScanning SQUID Microscopy, article, November 7, 2005; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc886377/: accessed October 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.