Effect of Strain Rate on the Slip Bands of Aluminium Single Crystals

Abstract

(1) Striking differences between the crystals subjected to the slow rate of strain in the order of creep and to the relatively rapid rate of strain can be found to observe at room temperature : i. e., the former has the wider slip bands, larger spacings between slip bands, fewer number of slip planes which concerned actually with gliding, and X-ray asterism more distinct than the latter. And the latter has also the tendency to form easily the twin texture after annealing.
(2) From many electron-micrographs, the formation of slip band seems to be as follows ; short range slip region of stringlet form→longe range slip region of platelet form-→slip band. On the surface of test piece the stringlet region looks like a spot figure and the platelet region like a shorter band figure than the ordinary slip band.