Abstract
Jump-like deformations as a phenomenon of plastic deformation instability is found for a wide range of ductile materials within certain temperature and strain rate ranges. It is known that temperature and strain rate are the most important parameters of inelastic deformation. For most polycrystals, in the absence of phase transitions, the increase of temperature and decrease of deformation speed leads to a reduction of stresses of inelastic deformation resistance. At the same time there is an inverse dependence of the flow stress for a great number of alloys in some ranges of temperatures and strain rates. Many researchers think that the main reason of this anomalous behaviour is a diffusion process and interaction of dislocations with solute atoms. The Portevin-Le Chatelier effect is one of the best known manifestations of the influence of diffusion processes on the behaviour of deformable materials. At the moment it is an urgent problem to identify ranges of actions, within which serrated yielding is implemented in order to exclude them from manufacturing modes of metal processing.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 0
Judged off_topic: no plant question — claims were not extracted. This is a scope decision by the model, not a statement about the paper’s findings.