Thickness and Orientation Dependence of Plastic Behaviors of Iron Whiskers

概要

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Stress-strain curves of iron whiskers, of which thickness ranges from 5 to 80 μ, have been measured using an Instron-type tensile machine at room temperature. All of the <111> whiskers show "work-softening", of which softening rate decreases with increasing thickness. "The lower yield stress" decrease with increasing thickness in <100> and <111> whiskers thinner than about 35 μ. Marked thickness and orientation dependence of the stress-strain curve have been found. The <100> whiskers thinner than about 8 μ show no appreciable plastic deformation after the sharp yielding, as already known in very thin whiskers. Those, 8∼17 μ in thickness, show nearly flat regions in their stress-strain curves after yielding and those thicker than about 17 μ reveal "work-hardening" after about 5% strain.
社団法人日本物理学会の論文
1971-01-05