Influence of local crystallography on the mechanisms of fatigue crack nucleation and propagation in metallic materials

Pedro Peralta, C. Laird, N. Dellan, R. Dickerson

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

1 Scopus citations

Abstract

The cyclic deformation mechanisms leading to crack nucleation in metallic materials are reviewed along with those responsible for fatigue crack growth, placing emphasis on local crystallography effects elucidated through experiments on bicrystals and multicrystals of FCC materials. Models for the kinematics of fatigue crack growth are discussed with respect to local slip geometry and the kinetics of crack propagation as well as Prof. Knott's fundamental contributions to the field. It is found that fatigue crack growth can be strongly affected by the local slip geometry and anisotropy. Furthermore, recent studies using Orientation Imaging Microscopy (OIM) reveal that the path followed by a fatigue crack in a multicrystal can be correlated to slip geometry inside a grain for transgranular fracture and the grain boundary misorientation for intergranular crack growth. The factors affecting the preference of one path over the other are discussed in terms of current models for fatigue crack growth.

Original languageEnglish (US)
Title of host publicationProceedings of the TMS Fall Meeting
EditorsW.O. Soboyejo, J.J. Lewandowski, R.O. Ritchie
Pages275-280
Number of pages6
StatePublished - 2002
EventMechanisms and Mechanics of Fracture: The John Knott Symposium - Columbus, OH, United States
Duration: Oct 7 2002Oct 10 2002

Other

OtherMechanisms and Mechanics of Fracture: The John Knott Symposium
CountryUnited States
CityColumbus, OH
Period10/7/0210/10/02

ASJC Scopus subject areas

  • Engineering(all)

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