Publication detail

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

KOHOUT, J. VĚCHET, S.

Original Title

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

Type

journal article - other

Language

English

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

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

Authors

KOHOUT, J.; VĚCHET, S.

RIV year

2005

Released

1. 6. 2005

Publisher

Redagovo S.Tamulevičius

Location

Kaunas

ISBN

1392-1320

Periodical

Materials Science

Year of study

11

Number

4

State

Republic of Lithuania

Pages from

338

Pages to

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",
  year="2005",
  volume="11",
  number="4",
  pages="338--343",
  issn="1392-1320"
}