In-situ fatigue crack growth testing of Al7075-T651 under scanning electron microscopy

W. Zhang, Y. Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, an in-situ scanning electron microscope (SEM) fatigue testing was performed to measure the crack growth kinetics and the corresponding crack tip opening displacement (CTOD) at the any small time instant during the constant cyclic tensile loading. The objective of the experimental study is to verify the hypotheses of a small time scale fatigue crack growth model. During the testing, one loading cycle is divided into a certain number of steps. Images are taken at each step around the crack tip region. Imaging analysis is used to quantify the crack growth kinetics and crack tip deformation behavior at any time instant in a loading cycle. Crack closure phenomenon is observed during the crack growth process. It is also observed that crack growth is not uniformly distributed within a loading cycle and only happens during a small portion of loading path.

Original languageEnglish (US)
Title of host publication52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
DOIs
StatePublished - Dec 1 2011
Externally publishedYes
Event52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Denver, CO, United States
Duration: Apr 4 2011Apr 7 2011

Publication series

NameCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
ISSN (Print)0273-4508

Other

Other52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUnited States
CityDenver, CO
Period4/4/114/7/11

ASJC Scopus subject areas

  • Architecture
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Zhang, W., & Liu, Y. (2011). In-situ fatigue crack growth testing of Al7075-T651 under scanning electron microscopy. In 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference [AIAA 2011-1985] (Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference). https://doi.org/10.2514/6.2011-1985