Abstract
Tensile stress was applied at a constant temperature to an alloy called Magnox (composed of Al 0.79, Be 0.006, Fe 0.0079wt%, and Mg balance). Number of voids and length of grain boundary migration produced by creep were measured.
The principal results obtained by experiments were as follows:
(1) Except for high velocities of creeping such as about 10% elongation/hr., number of voids was the maximum at 300°C for creeping velocity of lower than about 4% elongation/hr.
(2) Though with a few exceptions, the length of grain boundary migration was generally large at the temperature and creeping velocity for a large number of voids. (In most cases, the maximum length corresponded with the maximum number of voids).
