Effect of inclusions on initiation of stress corrosion cracks in X70 pipeline steel in an acidic soil environment

Z. Y. Liu; X. G. Li; C. W. Du; L. Lu; Y. R. Zhang; Y. F. Cheng

doi:10.1016/j.corsci.2009.01.007

Effect of inclusions on initiation of stress corrosion cracks in X70 pipeline steel in an acidic soil environment

Z. Y. Liu
, X. G. Li^*
, C. W. Du
, L. Lu
, Y. R. Zhang
, Y. F. Cheng

^*Corresponding author for this work

University of Science and Technology Beijing
University of Rochester
University of Calgary

Research output: Contribution to journal › Article › peer-review

201 Scopus citations

Abstract

The effect of inclusions on the initiation of stress corrosion cracking (SCC) X70 pipeline steel was investigated in an acidic soil solution using slow strain rate test, scanning electron microscopy and energy-dispersive X-ray techniques. The results demonstrated that stress corrosion cracks are not initiated in X70 steel when it is under anodic polarization. At cathodic polarization, hydrogen evolution is enhanced, and hydrogen is actively involved in SCC processes. Two types of inclusions exist in the steel and play different role in crack initiation. The inclusions enriching in Al are brittle and incoherent to the metal matrix. Microcracks and interstices are quite easily to be resulted in at the boundary between inclusions and metal. There is no crack initiating at inclusions containing mainly Si.

Original language	English
Pages (from-to)	895-900
Number of pages	6
Journal	Corrosion Science
Volume	51
Issue number	4
DOIs	https://doi.org/10.1016/j.corsci.2009.01.007
State	Published - Apr 2009
Externally published	Yes

Keywords

A. Steel
B. SEM
C. Inclusion
C. Stress corrosion

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10.1016/j.corsci.2009.01.007

Cite this

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title = "Effect of inclusions on initiation of stress corrosion cracks in X70 pipeline steel in an acidic soil environment",

abstract = "The effect of inclusions on the initiation of stress corrosion cracking (SCC) X70 pipeline steel was investigated in an acidic soil solution using slow strain rate test, scanning electron microscopy and energy-dispersive X-ray techniques. The results demonstrated that stress corrosion cracks are not initiated in X70 steel when it is under anodic polarization. At cathodic polarization, hydrogen evolution is enhanced, and hydrogen is actively involved in SCC processes. Two types of inclusions exist in the steel and play different role in crack initiation. The inclusions enriching in Al are brittle and incoherent to the metal matrix. Microcracks and interstices are quite easily to be resulted in at the boundary between inclusions and metal. There is no crack initiating at inclusions containing mainly Si.",

keywords = "A. Steel, B. SEM, C. Inclusion, C. Stress corrosion",

author = "Liu, \{Z. Y.\} and Li, \{X. G.\} and Du, \{C. W.\} and L. Lu and Zhang, \{Y. R.\} and Cheng, \{Y. F.\}",

year = "2009",

month = apr,

doi = "10.1016/j.corsci.2009.01.007",

language = "英语",

volume = "51",

pages = "895--900",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

number = "4",

}

TY - JOUR

T1 - Effect of inclusions on initiation of stress corrosion cracks in X70 pipeline steel in an acidic soil environment

AU - Liu, Z. Y.

AU - Li, X. G.

AU - Du, C. W.

AU - Lu, L.

AU - Zhang, Y. R.

AU - Cheng, Y. F.

PY - 2009/4

Y1 - 2009/4

N2 - The effect of inclusions on the initiation of stress corrosion cracking (SCC) X70 pipeline steel was investigated in an acidic soil solution using slow strain rate test, scanning electron microscopy and energy-dispersive X-ray techniques. The results demonstrated that stress corrosion cracks are not initiated in X70 steel when it is under anodic polarization. At cathodic polarization, hydrogen evolution is enhanced, and hydrogen is actively involved in SCC processes. Two types of inclusions exist in the steel and play different role in crack initiation. The inclusions enriching in Al are brittle and incoherent to the metal matrix. Microcracks and interstices are quite easily to be resulted in at the boundary between inclusions and metal. There is no crack initiating at inclusions containing mainly Si.

AB - The effect of inclusions on the initiation of stress corrosion cracking (SCC) X70 pipeline steel was investigated in an acidic soil solution using slow strain rate test, scanning electron microscopy and energy-dispersive X-ray techniques. The results demonstrated that stress corrosion cracks are not initiated in X70 steel when it is under anodic polarization. At cathodic polarization, hydrogen evolution is enhanced, and hydrogen is actively involved in SCC processes. Two types of inclusions exist in the steel and play different role in crack initiation. The inclusions enriching in Al are brittle and incoherent to the metal matrix. Microcracks and interstices are quite easily to be resulted in at the boundary between inclusions and metal. There is no crack initiating at inclusions containing mainly Si.

KW - A. Steel

KW - B. SEM

KW - C. Inclusion

KW - C. Stress corrosion

UR - https://www.scopus.com/pages/publications/62849094436

U2 - 10.1016/j.corsci.2009.01.007

DO - 10.1016/j.corsci.2009.01.007

M3 - 文章

AN - SCOPUS:62849094436

SN - 0010-938X

VL - 51

SP - 895

EP - 900

JO - Corrosion Science

JF - Corrosion Science

IS - 4

ER -

Effect of inclusions on initiation of stress corrosion cracks in X70 pipeline steel in an acidic soil environment

Abstract

Keywords

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