Abstract
The tensile test and the creep test of the iron whiskers having [100] and [111] growth directions which were produced by the reduction of iron chloride were carried out.
The cross-sectional area dependence of the feature of the stress-strain curves and the creep curves of iron whiskers was observed. Work hardening did not appear on the stress-strain curves of [111] iron whiskers, which were similar to the curves calculated from the Johnston-Gilman theory on LiF single crystal.
The equation for the relation between stress and strain of the iron whisker was derived from the Johnston-Gilman theory. The equation was solved under the condition of various initial mobile dislocation densities and dislocation multiplication rates. The result showed that the calculated stress-strain curves coresponded with the experimental stress-strain curves of [111] iron whiskers under the assumption that the initial mobile dislocation density and dislocation multiplication rate were reduced with a reduction of the cross-sectional area of iron whisker.
