An experimental investigation of tensile properties and fatigue crack growth behaviour for Dual-Phase Steel / Roslinda Idris...[et al.]

Idris, Roslinda and Abdullah, Shahrum and Prakash, Thamburaja and Omar, Mohd. Zaidi (2018) An experimental investigation of tensile properties and fatigue crack growth behaviour for Dual-Phase Steel / Roslinda Idris...[et al.]. Journal of Mechanical Engineering (JMechE), 15 (2). pp. 155-167. ISSN 1823-5514 ; 2550-164X

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.

Metadata

Item Type: Article
Creators:
CreatorsEmail / ID. Num
Idris, RoslindaUNSPECIFIED
Abdullah, Shahrumshahrum@ukm.edu.my
Prakash, ThamburajaUNSPECIFIED
Omar, Mohd. ZaidiUNSPECIFIED
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Mechanical Engineering
Journal or Publication Title: Journal of Mechanical Engineering (JMechE)
Journal: UiTM Journal > Journal of Mechanical Engineering (JMechE)
ISSN: 1823-5514 ; 2550-164X
Volume: 15
Number: 2
Page Range: pp. 155-167
Official URL: https://jmeche.uitm.edu.my/
Item ID: 36335
Uncontrolled Keywords: Dual-phase steel; Fatigue crack growth
URI: http://ir.uitm.edu.my/id/eprint/36335

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