Paper Title:
The Charpy Notch Impact Test of X70 Pipeline Steel with Delamination Cracks
  Abstract

The effects of thickness, notch orientation and delamination cracks on the impact toughness of X70 pipeline steel are investigated experimentally by use of the instrumented Charpy impact tests at different temperatures. The couple effect of delamination cracks, thickness, notch orientation and temperature is discovered. The delamination cracks have certain direction, and their amount and size are related to the temperature and the specimen thickness. Though the delaminating orientations of T-S and T-L specimen are not same, the reasons for both T-S and T-L specimen delaminating are that the weak interfaces in the specimens are pulled apart by the stress perpendicular to them. The delamination cracks can improve the actual impact toughness of X70 pipeline steel both T-L and T-S specimens. The effect of delamination cracks on the actual impact toughness changes with the thickness and the temperature. The couple effect of wall thickness, defect orientation and working temperature of pipeline must be taken into account in safe assessment of pipeline.

  Info
Periodical
Key Engineering Materials (Volumes 297-300)
Edited by
Young-Jin Kim, Dong-Ho Bae and Yun-Jae Kim
Pages
2391-2396
DOI
10.4028/www.scientific.net/KEM.297-300.2391
Citation
Z. Yang, C. Y. Huo, W. Guo, "The Charpy Notch Impact Test of X70 Pipeline Steel with Delamination Cracks", Key Engineering Materials, Vols. 297-300, pp. 2391-2396, 2005
Online since
November 2005
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: Chen Xu, Herbert Danninger, Golta Khatibi, Brigitte Weiss
Abstract:Crack initiation and short crack propagation was studied on the polished notched surfaces of Cr-Mo prealloy sintered steels with 7.35 g.cm-3...
685
Authors: Robert Pala, Jarosław Galkiewicz, Ihor Dzioba
Abstract:In the paper was compared the stress state in front of the crack for SEN(B) specimens of S235RJ steel without and with delamination cracks....
145