Velocity-dependent fatigue crack paths in nanograined Pt films

R. A. Meirom, Trevor Edward Clark, R. Polcawich, J. Pulskamp, M. Dubey, C. L. Muhlstein

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Abstract

Studies of crack growth in nanograined films assert that mechanical damage accumulates at grain boundaries irrespective of the crack velocity and loading conditions. This work shows that crack advance in nanograined Pt films involves a dislocation-slip mechanism that is a function of the crack growth rate and mode of loading. Crack paths in Pt were initially intergranular, but transitioned to a transgranular mode that persisted until catastrophic failure. This research demonstrates that crack growth mechanisms modeled for nanograined Ni cannot be generalized to other pure, metallic systems.

Original languageEnglish (US)
Article number085503
JournalPhysical Review Letters
Volume101
Issue number8
DOIs
StatePublished - Aug 19 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Meirom, R. A., Clark, T. E., Polcawich, R., Pulskamp, J., Dubey, M., & Muhlstein, C. L. (2008). Velocity-dependent fatigue crack paths in nanograined Pt films. Physical Review Letters, 101(8), [085503]. https://doi.org/10.1103/PhysRevLett.101.085503