Detail publikace

Some Peculiarities in Deformation and Fracture Behaviour of Austempered Ductile Cast Iron

KOHOUT, J. VĚCHET, S.

Anglický název

Some Peculiarities in Deformation and Fracture Behaviour of Austempered Ductile Cast Iron

Typ

Článek recenzovaný mimo WoS a Scopus

Jazyk

en

Originální abstrakt

Tensile tests and fracture thoughness tests of an unalloyed austempered ductile cast iron (ADI) with the matrix created by upper bainite and containing 30 to 35% of retained austenite were performed in a temperature range – 196C to + 200C to study its mechanical behaviour. The temperature depnedence of true fracture stress, elongation to fracture, and reduction of area is separated into three regions with different fracture behaviour. Unmonotonous temperature depnedence of yeld points defined by plastic strain of 0.05 to 2% is evidence of the stress induced phase transformation of retained austenite into martensite before these values of plastic strain are reached. The transformation of retained austenite is also substantiated with an increase of hardness and in several cases the decrease of retained austenite content was directly determined with X-ray quantitative phase analysis. Also higher values of dynamic than of static fracture thoughness are evidence of unusual behviour of ADI due to retained austenite presence in ADI structure.

Klíčová slova anglicky

Fracture thoughness, Austempered Ductile Iron, retained austenite, yeld stress, tensile tests

Vydáno

2005-06-01

Nakladatel

Redagovo S.Tamulevičius

Místo

Kaunas

ISSN

1392-1320

Ročník

11

Číslo

4

Strany od–do

338–343

Počet stran

6

BIBTEX


@article{BUT46677,
  author="Jan {Kohout} and Stanislav {Věchet}",
  title="Some Peculiarities in Deformation and Fracture Behaviour of Austempered Ductile Cast Iron",
  journal="Materials Science-Medziagotyra",
  year="2005",
  volume="11",
  number="4",
  pages="338--343",
  issn="1392-1320"
}