Effect of grain boundaries on PLC plastic instabilities

Z. Kovács, D. Fátay, K. Nyilas, J. Lendvai

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The effect of single grain boundaries on the Portevin Le Châtelier (PLC) effect was investigated by depth sensing Vickers indentation. The experiments were carried out in load control. Independently appearing PLC bands were observed in the plastic volume and they were attributed to the hindered dislocation motion through the grain boundary. The hardening effect of the grain boundary and the release of the piled-up dislocations were also observed. This transient effect is manifested in a dynamic over-shooting in the hardness decrease, which is the consequence of the PLC effect as it is reproduced also by a phenomenological numerical model.

Original languageEnglish
Pages (from-to)23-26
Number of pages4
JournalJournal of Engineering Materials and Technology, Transactions of the ASME
Volume124
Issue number1
DOIs
Publication statusPublished - Jan 2002

Fingerprint

Grain boundaries
plastics
grain boundaries
Plastics
Dislocations (crystals)
Indentation
Hardening
Numerical models
Hardness
indentation
hardening
hardness
Experiments

ASJC Scopus subject areas

  • Mechanical Engineering
  • Materials Science(all)

Cite this

Effect of grain boundaries on PLC plastic instabilities. / Kovács, Z.; Fátay, D.; Nyilas, K.; Lendvai, J.

In: Journal of Engineering Materials and Technology, Transactions of the ASME, Vol. 124, No. 1, 01.2002, p. 23-26.

Research output: Contribution to journalArticle

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