Interaction Potential between a Dislocation and a Pinning Atom in FCC Metals

T. Kosugi; Yoshiaki Kogure; Yoichi Nishino; N. Ide; I. Nakamichi

doi:10.4028/www.scientific.net/SSP.184.131

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HomeSolid State PhenomenaSolid State Phenomena Vol. 184Interaction Potential between a Dislocation and a...

Interaction Potential between a Dislocation and a Pinning Atom in FCC Metals

Abstract:

Amplitude dependent internal friction (ADIF) was measured on 4N and 6N Cu crystals at 4K–40 K to study the interaction between a dislocation and a pinning atom. The temperature dependence of the stress amplitude necessary to produce a constant ADIF was well explained by assuming the Cottrell type interaction potential based on linear elasticity. This is clearly different from the case of Al crystals where it was necessary to consider a modified Cottrell potential including a deviation from linear elasticity near the dislocation center.

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Solid State Phenomena (Volume 184)

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131-136

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https://doi.org/10.4028/www.scientific.net/SSP.184.131

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Online since:

January 2012

Authors:

T. Kosugi, Yoshiaki Kogure, Yoichi Nishino, N. Ide, I. Nakamichi

Keywords:

Amplitude-Dependent Internal Friction (ADIF), Dislocation-Point Defect Interaction, FCC Metals, Interaction Potential

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