Three-dimensional characterization of fatigue crack propagation behavior in an aluminum alloy using high resolution X-Ray microtomography

H. Zhang, P. C. Qu, Y. Sakaguchi, H. Toda, M. Kobayashi, K. Uesugi, Y. Suzuki

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

Abstract

Synchrotron X-ray microtomography has been used for the in-situ observation of three-dimensional (3D) fatigue crack propagation of an aluminum alloy. Local crack growth rates were calculated at different positions along specimen thickness. Crack observation revealed that crack propagation was frequently retarded in local region where crack overlapped crack segments exist. Propagation of cracks into overlapped region was strongly constrained due to stress shielding. Observation of crack propagation process indicated that the overlapped crack segments generally corresponds to the potion of twisted crack. Crack tip opening displacement was measured and it was found that crack opening was larger in single planar crack than that in crack overlapping region.

Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition MS and T'08
Pages1107-1116
Number of pages10
Publication statusPublished - 2008
Externally publishedYes
EventMaterials Science and Technology Conference and Exhibition, MS and T'08 - Pittsburgh, PA, United States
Duration: Oct 5 2008Oct 9 2008

Publication series

NameMaterials Science and Technology Conference and Exhibition, MS and T'08
Volume2

Other

OtherMaterials Science and Technology Conference and Exhibition, MS and T'08
CountryUnited States
CityPittsburgh, PA
Period10/5/0810/9/08

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials

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