Dislocation Damping at High Strain Rates in Aluminum and Aluminum-Copper Alloy
- 1 February 1970
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 41 (2) , 674-677
- https://doi.org/10.1063/1.1658731
Abstract
Impact shear tests have been used to study the dependence of shear stress with shear‐strain rate at strain rates ranging from 0.5×104 to 2.2×104 sec−1 in pure Al, prestrained Al, and Al‐2 at. % Cu alloy. Within this strain‐rate range a linear relationship was found between shear‐stress and shear‐strain rates, indicating the presence of a viscous drag on dislocations. The dependence on temperature of this viscous damping was investigated between 10° and 293°K. The results are discussed in terms of theories of phonon viscosity and phonon scattering, and of electron viscosity at low temperatures.This publication has 14 references indexed in Scilit:
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