Fracture properties of ferritic, ferritic- pearlitic, pearlitic and bainitic nodular cast irons

Tero Öberg, Kim Wallin

Research output: Book/ReportReportProfessional

1 Citation (Scopus)

Abstract

The use of nodular cast irons in components having high safety requirements has increased rapidly during last years. Casting permits a design where the stress concentrations are minimised and the cast material itself has shown to have good mechanical properties which can be obtained repeatedly. Although the conventional mechanical properties of nodular cast irons are well defined, the fracture behaviour is not because the fracture toughness and fatigue property data have until now been scarce. In this work different nodular cast irons were tested in order to investigate the thickness and temperature effects on the fracture toughness parameters KQ, delta and JIc . The fatigue parameters C, m and DELTA Kth were also examined. Although the microstructure forms the basis of the fracture behaviour of nodular cast irons, it was found that some deviations in fracture properties reported in the literature are due to insufficient testing conditions.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages40
ISBN (Print)951-38-2665-1
Publication statusPublished - 1986
MoE publication typeD4 Published development or research report or study

Publication series

NameTutkimuksia / Valtion teknillinen tutkimuskeskus
PublisherVTT
Volume430

Fingerprint

Nodular iron
Fracture toughness
Fatigue of materials
Mechanical properties
Thermal effects
Stress concentration
Casting
Microstructure
Testing

Keywords

  • cast iron
  • nodular iron
  • fracture properties

Cite this

Öberg, T., & Wallin, K. (1986). Fracture properties of ferritic, ferritic- pearlitic, pearlitic and bainitic nodular cast irons. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 430
Öberg, Tero ; Wallin, Kim. / Fracture properties of ferritic, ferritic- pearlitic, pearlitic and bainitic nodular cast irons. Espoo : VTT Technical Research Centre of Finland, 1986. 40 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 430).
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Öberg, T & Wallin, K 1986, Fracture properties of ferritic, ferritic- pearlitic, pearlitic and bainitic nodular cast irons. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, no. 430, VTT Technical Research Centre of Finland, Espoo.

Fracture properties of ferritic, ferritic- pearlitic, pearlitic and bainitic nodular cast irons. / Öberg, Tero; Wallin, Kim.

Espoo : VTT Technical Research Centre of Finland, 1986. 40 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 430).

Research output: Book/ReportReportProfessional

TY - BOOK

T1 - Fracture properties of ferritic, ferritic- pearlitic, pearlitic and bainitic nodular cast irons

AU - Öberg, Tero

AU - Wallin, Kim

PY - 1986

Y1 - 1986

N2 - The use of nodular cast irons in components having high safety requirements has increased rapidly during last years. Casting permits a design where the stress concentrations are minimised and the cast material itself has shown to have good mechanical properties which can be obtained repeatedly. Although the conventional mechanical properties of nodular cast irons are well defined, the fracture behaviour is not because the fracture toughness and fatigue property data have until now been scarce. In this work different nodular cast irons were tested in order to investigate the thickness and temperature effects on the fracture toughness parameters KQ, delta and JIc . The fatigue parameters C, m and DELTA Kth were also examined. Although the microstructure forms the basis of the fracture behaviour of nodular cast irons, it was found that some deviations in fracture properties reported in the literature are due to insufficient testing conditions.

AB - The use of nodular cast irons in components having high safety requirements has increased rapidly during last years. Casting permits a design where the stress concentrations are minimised and the cast material itself has shown to have good mechanical properties which can be obtained repeatedly. Although the conventional mechanical properties of nodular cast irons are well defined, the fracture behaviour is not because the fracture toughness and fatigue property data have until now been scarce. In this work different nodular cast irons were tested in order to investigate the thickness and temperature effects on the fracture toughness parameters KQ, delta and JIc . The fatigue parameters C, m and DELTA Kth were also examined. Although the microstructure forms the basis of the fracture behaviour of nodular cast irons, it was found that some deviations in fracture properties reported in the literature are due to insufficient testing conditions.

KW - cast iron

KW - nodular iron

KW - fracture properties

M3 - Report

SN - 951-38-2665-1

T3 - Tutkimuksia / Valtion teknillinen tutkimuskeskus

BT - Fracture properties of ferritic, ferritic- pearlitic, pearlitic and bainitic nodular cast irons

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Öberg T, Wallin K. Fracture properties of ferritic, ferritic- pearlitic, pearlitic and bainitic nodular cast irons. Espoo: VTT Technical Research Centre of Finland, 1986. 40 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 430).