Publication detail

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

KOHOUT, J. VĚCHET, S.

English title

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

Type

Peer-reviewed article not indexed in WoS or Scopus

Language

en

Original abstract

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.

Keywords in English

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

Released

2005-06-01

Publisher

Redagovo S.Tamulevičius

Location

Kaunas

ISSN

1392-1320

Volume

11

Number

4

Pages from–to

338–343

Pages count

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"
}