Page 222 - Fiber Fracture
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STRENGTH AND FRACTURE OF METALLIC FILAMENTS 207
1
Fig. 22. Tensile strength of 25 Wm diameter Au wires after pulsed anneals at different temperatures.
20
0
io-* IO-' 1 10' io2 io3 io4
Annealing time [s] +
Fig. 23. Elongation at rupture of 25 bm diameter Au wires after pulsed anneals at different temperatures.
determined by the sum of all modifications that occurred through thermal activation. In
order to get a unified description of the evolution of the yield stress it appears therefore
justified to assume that also the yield stress depends on the thermal activation. For
the tensile strength and probably in an even stronger measure for the elongation after
rupture we would have to take account also of additional influences that stem from
surface defects and sample geometry. The following arguments, therefore, primarily
concern the yield stress.
