Full Text:   <2504>

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CLC number: TG174

On-line Access: 2013-04-03

Received: 2012-10-17

Revision Accepted: 2013-01-03

Crosschecked: 2013-03-06

Cited: 3

Clicked: 2987

Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2013 Vol.14 No.4 P.292-299


3D analysis for pit evolution and pit-to-crack transition during corrosion fatigue*

Author(s):  Xiao-guang Huang1, Jin-quan Xu2

Affiliation(s):  1. Department of Engineering Mechanics, China University of Petroleum, Qingdao 266580, China; more

Corresponding email(s):   huangupc@126.com

Key Words:  Pit, Evolving morphology, Thermodynamic potential, Critical pit size, Crack nucleation

Xiao-guang Huang, Jin-quan Xu. 3D analysis for pit evolution and pit-to-crack transition during corrosion fatigue[J]. Journal of Zhejiang University Science A, 2013, 14(4): 292-299.

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author="Xiao-guang Huang, Jin-quan Xu",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T 3D analysis for pit evolution and pit-to-crack transition during corrosion fatigue
%A Xiao-guang Huang
%A Jin-quan Xu
%J Journal of Zhejiang University SCIENCE A
%V 14
%N 4
%P 292-299
%@ 1673-565X
%D 2013
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1200273

T1 - 3D analysis for pit evolution and pit-to-crack transition during corrosion fatigue
A1 - Xiao-guang Huang
A1 - Jin-quan Xu
J0 - Journal of Zhejiang University Science A
VL - 14
IS - 4
SP - 292
EP - 299
%@ 1673-565X
Y1 - 2013
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1200273

This paper presents a deterministic model to predict the pit evolving morphology and crack initiation life of corrosion fatigue. Based on the semi-ellipsoidal pit assumption, the thermodynamic potential including elastic energy, surface energy and electrochemical energy of the cyclically stressed solid with an evolving pit is established, from which specific parameters that control the pit evolution are introduced and their influence on the pit evolution are evaluated. The critical pit size for crack nucleation is obtained from stress intensity factor criterion and the crack nucleation life is evaluated by Faraday’s law. Meanwhile, this paper presents a numerical example to verify the proposed model and investigate the influence of cyclic load on the corrosion fatigue crack nucleation life. The corrosion pit appears approximately as a hemisphere in its early formation, and it gradually transits from semicircle to ellipsoid. The strain energy accelerates the morphology evolution of the pit, while the surface energy decelerates it. The higher the stress amplitude is, the smaller the critical pit size is and the shorter the crack initiation life is.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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