Anomalous yielding in alloys at low temperatures
- 1 July 1986
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 54 (1) , L9-L13
- https://doi.org/10.1080/01418618608242878
Abstract
The available data on the temperature dependence of the critical resolved shear stress τ of aluminium single crystals containing 0·6 to 9·0 at.% magnesium in the range 1·6 to 135 K are examined within the framework of the kink-pair model of solid-solution hardening. The anomalous behaviour at low temperatures, i.e. the reversal of the sign of dτ/dT below a critical temperature T 0 is considered to be a consequence of structural changes in slip bands as T→0K, which necessitates the introduction of a stress-concentration factor f(T) = exp[1-(T/T 0)α] into the equations of plastic flow. The constant α, like the critical temperature T 0, is specific to the material.Keywords
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