Reduction of plastic zone size at crack tip and acoustic emission for A537 steel in 3.5% NaCl solution during corrosion fatigue growth

Zhengfu Wang, Jin Li, Xuejun Wei, Xiangyang Zhou, Wei Ke, Zuming Zhu

Research output: Contribution to journalArticle

Abstract

The fatigue crack propagation, the plastic deformation at the crack tip and the acoustic emission behaviour for each cycle of crack growth were studied for a low strength steel A537 in both air and 3.5% NaCl aqueous solution. The reduction in the specimen thickness on the fracture surface was measured as a function of the crack length in order to determine the influence of corrosive medium on the plastic deformation of crack tip material. The laser speckle interferometry was used to characterize the plastic deformation behaviour on the surface of the plastic zone at crack tip in air and 3.5% NaCl solution under the hydrogen charging conditions, and the mono-direction tension behaviour of smooth specimens in two environments was examined. The results showed that acoustic emission count rate increased with the fatigue crack propagation rate in almost a linear way in both air and solution environments. The distinct effect of corrosive solution was to increase the fatigue crack propagation rate and at the same time to decrease the acoustic emission count rate. In both air and corrosive solution the fracture surface took on a morphology of ductile striations, which shows that CF crack propagation takes place due to alternative plastic blunting and resharpening of the crack tip by dislocation slip. The fact that the thickness on the fracture surface reduced with increasing crack length indicated that the plastic zone size at the crack tip increased with increasing crack length.

Original languageEnglish
Pages (from-to)18-22
Number of pages5
JournalCailiao Yanjiu Xuebao/Chinese Journal of Materials Research
Volume8
Issue number1
StatePublished - Feb 1 1994
Externally publishedYes

Fingerprint

Corrosion fatigue
Steel
Acoustic emissions
Crack tips
Caustics
Plastics
Fatigue crack propagation
Plastic deformation
Air
Cracks
Crack propagation
Speckle
Interferometry
Hydrogen
Lasers

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Metals and Alloys
  • Polymers and Plastics

Cite this

Reduction of plastic zone size at crack tip and acoustic emission for A537 steel in 3.5% NaCl solution during corrosion fatigue growth. / Wang, Zhengfu; Li, Jin; Wei, Xuejun; Zhou, Xiangyang; Ke, Wei; Zhu, Zuming.

In: Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research, Vol. 8, No. 1, 01.02.1994, p. 18-22.

Research output: Contribution to journalArticle

@article{2e8ea77c8c5748e79d9383555ace52d8,
title = "Reduction of plastic zone size at crack tip and acoustic emission for A537 steel in 3.5{\%} NaCl solution during corrosion fatigue growth",
abstract = "The fatigue crack propagation, the plastic deformation at the crack tip and the acoustic emission behaviour for each cycle of crack growth were studied for a low strength steel A537 in both air and 3.5{\%} NaCl aqueous solution. The reduction in the specimen thickness on the fracture surface was measured as a function of the crack length in order to determine the influence of corrosive medium on the plastic deformation of crack tip material. The laser speckle interferometry was used to characterize the plastic deformation behaviour on the surface of the plastic zone at crack tip in air and 3.5{\%} NaCl solution under the hydrogen charging conditions, and the mono-direction tension behaviour of smooth specimens in two environments was examined. The results showed that acoustic emission count rate increased with the fatigue crack propagation rate in almost a linear way in both air and solution environments. The distinct effect of corrosive solution was to increase the fatigue crack propagation rate and at the same time to decrease the acoustic emission count rate. In both air and corrosive solution the fracture surface took on a morphology of ductile striations, which shows that CF crack propagation takes place due to alternative plastic blunting and resharpening of the crack tip by dislocation slip. The fact that the thickness on the fracture surface reduced with increasing crack length indicated that the plastic zone size at the crack tip increased with increasing crack length.",
author = "Zhengfu Wang and Jin Li and Xuejun Wei and Xiangyang Zhou and Wei Ke and Zuming Zhu",
year = "1994",
month = "2",
day = "1",
language = "English",
volume = "8",
pages = "18--22",
journal = "Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research",
issn = "1005-3093",
publisher = "Chinese Journal of Materials Research",
number = "1",

}

TY - JOUR

T1 - Reduction of plastic zone size at crack tip and acoustic emission for A537 steel in 3.5% NaCl solution during corrosion fatigue growth

AU - Wang, Zhengfu

AU - Li, Jin

AU - Wei, Xuejun

AU - Zhou, Xiangyang

AU - Ke, Wei

AU - Zhu, Zuming

PY - 1994/2/1

Y1 - 1994/2/1

N2 - The fatigue crack propagation, the plastic deformation at the crack tip and the acoustic emission behaviour for each cycle of crack growth were studied for a low strength steel A537 in both air and 3.5% NaCl aqueous solution. The reduction in the specimen thickness on the fracture surface was measured as a function of the crack length in order to determine the influence of corrosive medium on the plastic deformation of crack tip material. The laser speckle interferometry was used to characterize the plastic deformation behaviour on the surface of the plastic zone at crack tip in air and 3.5% NaCl solution under the hydrogen charging conditions, and the mono-direction tension behaviour of smooth specimens in two environments was examined. The results showed that acoustic emission count rate increased with the fatigue crack propagation rate in almost a linear way in both air and solution environments. The distinct effect of corrosive solution was to increase the fatigue crack propagation rate and at the same time to decrease the acoustic emission count rate. In both air and corrosive solution the fracture surface took on a morphology of ductile striations, which shows that CF crack propagation takes place due to alternative plastic blunting and resharpening of the crack tip by dislocation slip. The fact that the thickness on the fracture surface reduced with increasing crack length indicated that the plastic zone size at the crack tip increased with increasing crack length.

AB - The fatigue crack propagation, the plastic deformation at the crack tip and the acoustic emission behaviour for each cycle of crack growth were studied for a low strength steel A537 in both air and 3.5% NaCl aqueous solution. The reduction in the specimen thickness on the fracture surface was measured as a function of the crack length in order to determine the influence of corrosive medium on the plastic deformation of crack tip material. The laser speckle interferometry was used to characterize the plastic deformation behaviour on the surface of the plastic zone at crack tip in air and 3.5% NaCl solution under the hydrogen charging conditions, and the mono-direction tension behaviour of smooth specimens in two environments was examined. The results showed that acoustic emission count rate increased with the fatigue crack propagation rate in almost a linear way in both air and solution environments. The distinct effect of corrosive solution was to increase the fatigue crack propagation rate and at the same time to decrease the acoustic emission count rate. In both air and corrosive solution the fracture surface took on a morphology of ductile striations, which shows that CF crack propagation takes place due to alternative plastic blunting and resharpening of the crack tip by dislocation slip. The fact that the thickness on the fracture surface reduced with increasing crack length indicated that the plastic zone size at the crack tip increased with increasing crack length.

UR - http://www.scopus.com/inward/record.url?scp=0028368626&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028368626&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0028368626

VL - 8

SP - 18

EP - 22

JO - Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research

JF - Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research

SN - 1005-3093

IS - 1

ER -