Paper Title:
Effect of Laser Shock Processing on Sulfide Stress Corrosion Cracking of X70 Pipeline Steel Welded Joint
  Abstract

Laser shock processing (LSP) is a new technique for metal surface strengthening by which residual compressive stress in the superficial layer can be induced to greatly improve the stress corrosion resistance property. The effect of LSP on sulfide stress corrosion cracking (SSCC) of X70 pipeline steel welded joint has been studied in this paper. A convergent lens is used to deliver 20 J, 20 ns laser pulses by a Q switch Nd:YAG laser, operating at 10 Hz. The pulses are focused to a diameter of 3 mm onto samples. The power density of laser at the surface of the sample was about 5 GW/cm2. The surface residual stress level after LSP is much higher than before. SSCC behavior of X70 pipeline steel welded joint was investigated using slow strain rate testing (SSRT) in H2S solution. Morphology of X70 pipeline steel fracture surface was observed by scanning electron microscope (SEM). It has been demonstrated that LSP is an effective surface treatment technique to improve the stress corrosion cracking (SCC) resistance properties of X70 pipeline steel welded joints.

  Info
Periodical
Edited by
Ran Chen
Pages
451-455
DOI
10.4028/www.scientific.net/AMM.44-47.451
Citation
J. F. Pei, J. N. Liu, W. Y. He, "Effect of Laser Shock Processing on Sulfide Stress Corrosion Cracking of X70 Pipeline Steel Welded Joint", Applied Mechanics and Materials, Vols. 44-47, pp. 451-455, 2011
Online since
December 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Byung Bok Choi, Dong Ho Bae
Abstract:Austenitic stainless steel is a useful material for various industrial facilities such as the nuclear and steam power plant and the heavy...
9
Authors: Won Beom Kim, Jeom Kee Paik
Abstract:In this research, corrosion fatigue tests using tensile strength of 490MPa TMCP steel were performed in synthetic seawater condition to...
1145
Authors: Yong Jiang, Jian Ming Gong, Zheng Gang Yu, Dong Song Rong
Abstract:In this paper, mechanical performance test, slow strain rate test (SSRT) and optical microscopy analysis were employed in studying the effect...
34
Authors: Bing Chen, Xiao Li, Yu Guang Fan
Chapter 13: Surface Engineering/Coatings
Abstract:Special SHY-99 anti-corrosion coatings are used for newly developed heat exchange equipment, to resist corrosion and leakage problem of...
1886
Authors: Jie Ma, Yuan Sheng Yang, Xiu Chun Wang, Jing Zhang, Shuo Liu, Li Kun Jiang, Xi Bin Yi
Chapter 11: Thin Films/Surface Engineering/Coatings
Abstract:Microarc oxidation coatings were prepared on the surface of AZ31 magnesium alloy profiles. Oxidation time of the coatings was between...
1993