Mobility of Dislocations in Aluminum at 74° and 83°K

In a previous article(1) the authors reported determinations of velocity of dislocations in high-purity single crystals of as a function of applied stress in the temperature 123° to 343°K. These results were obtained using a stress-pulse in which dislocation positions were observed and after the stress pulse using the Berg-Barrett x-ray . This note reports an extension of the dislocation measurements in aluminum to lower temperatures, 74° 83°K, and discusses their significance.