An x-ray study of deformation stacking faults at low temperatures in lead, some lead alloys, and aluminium

Abstract

The deformation stocking-fault probability α, has been determined by the deformation of bulk specimens of zone-refined lead at 4·2° and 77°k. Aluminium (99·996%), α-brass (70:30), lead-0·1 at. % silver and lead.20·0 at. %. indium were also examined at 4·2°k. It is shown that a major difference exists between aluminium and lead, the latter being copper-like in its value of α. The influence of increased deformation in increasing the value of a is demonstrated. Addition of indium to lead suppresses a measurable value of a which correlated with observations made on twinning in this alloy.