Publication detail

The influence of Mean Stress on Fatigue Properties of ADI

VĚCHET, S. KOHOUT, J. HANZLÍKOVÁ, K. HRUBÝ, V.

Original Title

The influence of Mean Stress on Fatigue Properties of ADI

Type

journal article - other

Language

English

Original Abstract

The paper presents the results of research focused on assessment of the influence of loading cycle asymmetry on fatigue limit values. For tests two heats of unalloyed nodular cast iron were used. Test bars made of keel blocks were heat treated in salt bathes (austenitization at 900oC during 1 hour, isothermal transformation at 380 and 400oC) and loaded at symmetrical, repeating and pulsating loading cycles at room temperature. Evaluation of fatigue properties was based on the determination of S-N curves in high-cycle region including the fatigue limit assessment for 10*7 cycles to fracture. Fatigue and static tests were completed by metallographic and quantitative phase analysis. Most important result obtained from the presented study is that the dependence of stress amplitude on mean stress cannot be approached by the linear relation but by general power law with eyponent lower than 1 (i. e. the Haigh diagram has convex shape).

Keywords

Austempered ductile iron; Fatigue properties; Loading cycle asymmetry; Mean stress Haigh diagram; Smith diagram

Authors

VĚCHET, S.; KOHOUT, J.; HANZLÍKOVÁ, K.; HRUBÝ, V.

RIV year

2008

Released

1. 1. 2008

Publisher

Trans Tech Publications Ltd

Location

Stafa-Zurich Switzerland

ISBN

0255-5476

Periodical

Materials Science Forum

Year of study

567-568

Number

5

State

Swiss Confederation

Pages from

341

Pages to

344

Pages count

4

BibTex

@article{BUT48934,
  author="Stanislav {Věchet} and Jan {Kohout} and Klára {Hanzlíková} and Vojtěch {Hrubý}",
  title="The influence of Mean Stress on Fatigue Properties of ADI",
  journal="Materials Science Forum",
  year="2008",
  volume="567-568",
  number="5",
  pages="341--344",
  issn="0255-5476"
}