Paper Title:
A Study on the Evaluation of Creep Degradation of High Temperature Pipeline Steel by Non-Destructive Test
  Abstract

In this paper, artificial creep degradation test and ultrasonic measurement for their creep degraded specimens (Cr-Mo alloy steel) were carried out for the purpose of evaluation for creep damage. Absolute measuring method of quantitative ultrasonic measurement for material degradation was established, and long-term creep degradation tests using creep life prediction formula were carried out. As a result of ultrasonic tests for crept specimens, we conformed that both the sound velocity decreased and attenuation coefficient linearly increased in proportion to the increase of creep life fraction (fc). In frequency and noise analysis, it was conformed that the high frequency side spectra and central frequency components shift to low frequency band, and bandwidths decrease as increasing creep damage in backwall echo. And also, the ultrasonic noise linearly increased in proportion to the increase of creep degradation.

  Info
Periodical
Key Engineering Materials (Volumes 297-300)
Edited by
Young-Jin Kim, Dong-Ho Bae and Yun-Jae Kim
Pages
1945-1950
DOI
10.4028/www.scientific.net/KEM.297-300.1945
Citation
S. G. Lee, "A Study on the Evaluation of Creep Degradation of High Temperature Pipeline Steel by Non-Destructive Test ", Key Engineering Materials, Vols. 297-300, pp. 1945-1950, 2005
Online since
November 2005
Authors
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: Jai Won Byeon, C.S. Kim, S.I. Kwun, S.J. Hong
Abstract:It was attempted to assess nondestructively the degree of isothermal degradation of 2.25Cr-1Mo steel by using high frequency longitudinal...
257
Authors: Jai Won Byeon, C.S. Kim, J.H. Song, S.I. Kwun
Abstract:For the quality monitoring and reliable application of stationary gas turbine blade (vane), near surface damages in the isothermally degraded...
1998
Authors: Sang Ll Lee, Jin Kyung Lee, Tae Soo An, Joon Hyun Lee, Jun Young Park
Abstract:This study dealt with the corrosion resistance for the carbon steels under a pressurized water atmosphere at the elevated temperature. The...
2407
Authors: Zhen Tian, Nai Ci Bing, Hong Yong Xie
Chapter 5:New Instruments and Sensors Development
Abstract:High-Resolution Ultrasonic Spectroscopy (HRUS) is a novel analytical technique for non-destructive material analysis for a wide range of...
146
Authors: Bo Zhao, Fan Chen, Jing Lin Tong
Chapter 7: Grinding and Non-Traditional Machining Technologies
Abstract:The nonlocal theory was introduced to establish the nonlocal constitutive model and analyze the effect of ultrasonic on the tensile strength...
456