An experimental investigation of tensile properties and fatigue crack growth behaviour for dual-phase steel

Research output: Contribution to journalArticle

Abstract

This paper presents the fatigue crack growth behaviour of a dual-phase steel. The fatigue strength of dual-phase steels can be influenced by their inherent microstructural phases, where hard martensitic phases are dispersed in a soft ferritic matrix. The main objective of this study is to investigate the fatigue crack growth behaviour of a dual-phase steel. The dual-phase steel was achieved by inter-critical heat treatments which specifically aimed to increase the resistance of the steel to fatigue loading. The tensile properties of dual-phase steels have been studied through tensile testing methods, while their fatigue crack growth behaviours have been experimentally investigated using compact-tension specimen under constant amplitude loading. The experimental results indicated that the fatigue crack growths in as-received steels could propagate more freely than that in dual-phase steel microstructures; thereby giving dual-phase steels a longer fatigue life compared to the as-received steels. A crack growth of about 22 % lower was observed in the dual-phase specimens compared to the as-received specimens. Finally, the variation of fatigue crack growth rate with stress intensity factor range for as-received and dual-phase steels was discussed within the Paris region. It was concluded that the presence of second hard phases (martensite) in dual-phase steel effectively retarded crack growths.

Original languageEnglish
Pages (from-to)155-167
Number of pages13
JournalJournal of Mechanical Engineering
Volume15
Issue number2
Publication statusPublished - 1 Jan 2018

Fingerprint

Fatigue crack propagation
Tensile properties
Steel
Crack propagation
Fatigue of materials
Tensile testing
Martensite
Stress intensity factors
Heat treatment
Microstructure

Keywords

  • Dual-phase steel
  • Fatigue crack growth behaviour
  • Microstructure
  • Tensile properties

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

@article{4e32a1e21f16481e9bb119c6b7c8e784,
title = "An experimental investigation of tensile properties and fatigue crack growth behaviour for dual-phase steel",
abstract = "This paper presents the fatigue crack growth behaviour of a dual-phase steel. The fatigue strength of dual-phase steels can be influenced by their inherent microstructural phases, where hard martensitic phases are dispersed in a soft ferritic matrix. The main objective of this study is to investigate the fatigue crack growth behaviour of a dual-phase steel. The dual-phase steel was achieved by inter-critical heat treatments which specifically aimed to increase the resistance of the steel to fatigue loading. The tensile properties of dual-phase steels have been studied through tensile testing methods, while their fatigue crack growth behaviours have been experimentally investigated using compact-tension specimen under constant amplitude loading. The experimental results indicated that the fatigue crack growths in as-received steels could propagate more freely than that in dual-phase steel microstructures; thereby giving dual-phase steels a longer fatigue life compared to the as-received steels. A crack growth of about 22 {\%} lower was observed in the dual-phase specimens compared to the as-received specimens. Finally, the variation of fatigue crack growth rate with stress intensity factor range for as-received and dual-phase steels was discussed within the Paris region. It was concluded that the presence of second hard phases (martensite) in dual-phase steel effectively retarded crack growths.",
keywords = "Dual-phase steel, Fatigue crack growth behaviour, Microstructure, Tensile properties",
author = "Roslinda Idris and Shahrum Abdullah and {G. Thamburaja}, {T Prakash} and Omar, {Mohd. Zaidi}",
year = "2018",
month = "1",
day = "1",
language = "English",
volume = "15",
pages = "155--167",
journal = "Journal of Mechanical Engineering",
issn = "1823-5514",
publisher = "Institut Pengurusan Penyelidikan (RMI), Universiti Teknologi MARA",
number = "2",

}

TY - JOUR

T1 - An experimental investigation of tensile properties and fatigue crack growth behaviour for dual-phase steel

AU - Idris, Roslinda

AU - Abdullah, Shahrum

AU - G. Thamburaja, T Prakash

AU - Omar, Mohd. Zaidi

PY - 2018/1/1

Y1 - 2018/1/1

N2 - This paper presents the fatigue crack growth behaviour of a dual-phase steel. The fatigue strength of dual-phase steels can be influenced by their inherent microstructural phases, where hard martensitic phases are dispersed in a soft ferritic matrix. The main objective of this study is to investigate the fatigue crack growth behaviour of a dual-phase steel. The dual-phase steel was achieved by inter-critical heat treatments which specifically aimed to increase the resistance of the steel to fatigue loading. The tensile properties of dual-phase steels have been studied through tensile testing methods, while their fatigue crack growth behaviours have been experimentally investigated using compact-tension specimen under constant amplitude loading. The experimental results indicated that the fatigue crack growths in as-received steels could propagate more freely than that in dual-phase steel microstructures; thereby giving dual-phase steels a longer fatigue life compared to the as-received steels. A crack growth of about 22 % lower was observed in the dual-phase specimens compared to the as-received specimens. Finally, the variation of fatigue crack growth rate with stress intensity factor range for as-received and dual-phase steels was discussed within the Paris region. It was concluded that the presence of second hard phases (martensite) in dual-phase steel effectively retarded crack growths.

AB - This paper presents the fatigue crack growth behaviour of a dual-phase steel. The fatigue strength of dual-phase steels can be influenced by their inherent microstructural phases, where hard martensitic phases are dispersed in a soft ferritic matrix. The main objective of this study is to investigate the fatigue crack growth behaviour of a dual-phase steel. The dual-phase steel was achieved by inter-critical heat treatments which specifically aimed to increase the resistance of the steel to fatigue loading. The tensile properties of dual-phase steels have been studied through tensile testing methods, while their fatigue crack growth behaviours have been experimentally investigated using compact-tension specimen under constant amplitude loading. The experimental results indicated that the fatigue crack growths in as-received steels could propagate more freely than that in dual-phase steel microstructures; thereby giving dual-phase steels a longer fatigue life compared to the as-received steels. A crack growth of about 22 % lower was observed in the dual-phase specimens compared to the as-received specimens. Finally, the variation of fatigue crack growth rate with stress intensity factor range for as-received and dual-phase steels was discussed within the Paris region. It was concluded that the presence of second hard phases (martensite) in dual-phase steel effectively retarded crack growths.

KW - Dual-phase steel

KW - Fatigue crack growth behaviour

KW - Microstructure

KW - Tensile properties

UR - http://www.scopus.com/inward/record.url?scp=85063375360&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063375360&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85063375360

VL - 15

SP - 155

EP - 167

JO - Journal of Mechanical Engineering

JF - Journal of Mechanical Engineering

SN - 1823-5514

IS - 2

ER -