Paper Title:
SEM In Situ Investigation on Fatigue Cracking Behavior of X80 Pipeline Steel with Inclusions
  Abstract

The micro-mechanical behavior of inclusions in X80 pipeline steel under fatigue loading was investigated by means of SEM in situ observation. The influence of sizes and shapes of inclusion on crack initiation and propagation was analyzed. The result shows that for large-size single-particle inclusion, cracks initiate from the interior under the fatigue loading. When a certain circulation cycles are reached, cracks initiate at the matrix near the sharp corner of the inclusion. The cracks extend at the matrix during the stable extension period and unstable extension period following the crack initiation, until fracture occurred. For chain inclusion, cracks first initiate at the interface between inclusion and matrix within the chain area, and the circulation cycles needed for initiation are far less than single inclusion. Cracks steadily extend after the initiation, and then fracture after very short circulation cycles. A chain of inclusion with the shape corners is serious harmful to the fatigue properties.

  Info
Periodical
Advanced Materials Research (Volumes 284-286)
Chapter
Iron and Steel
Edited by
Xiaoming Sang, Pengcheng Wang, Liqun Ai, Yungang Li and Jinglong Bu
Pages
1096-1100
DOI
10.4028/www.scientific.net/AMR.284-286.1096
Citation
K. Tong, Y. P. Zeng, X. L. Han, Y. R. Feng, X. D. He, "SEM In Situ Investigation on Fatigue Cracking Behavior of X80 Pipeline Steel with Inclusions", Advanced Materials Research, Vols. 284-286, pp. 1096-1100, 2011
Online since
July 2011
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: Young Pyo Kim, Cheol Man Kim, Woo Sik Kim, Kwang Seon Shin
Abstract:A clear understanding of fatigue properties for the pipeline steel and its weld is important to provide information for pipeline design...
303
Authors: Won Beom Kim, Jeom Kee Paik
Abstract:In this research, corrosion fatigue tests using 490MPa TMCP steel were performed in synthetic seawater condition to investigate the...
1043
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: Adam L. Pilchak, Wei Jie Lu, James C. Williams
Chapter 1: Invited Lectures
Abstract:Titanium (Ti) alloys are used in critical, fatigue limited applications in aircraft and aircraft engines. Current design practices are, of...
85