Yield point phenomena in alpha brass and other face-centred cubic metals

Abstract

The characteristics of yield points which may be produced in a 70:30 alpha brass have been observed at several temperatures. The yield point phenomena were produced by various techniques which included ageing under stress, unloading and combinations of the two. The effects arising from ageing under stress are compared to experiments on repeated yielding. The particular results in brass are supported by various experiments with a range of face-centred cubic metals. From the evidence presented it seems that the process of ageing is more complex than hitherto supposed.