Paper Title:
Nondestructive Evaluation of Welding Residual Stress in Power Plant Facilities Using Instrumented Indentation Technique
  Abstract

The weld joints in power-plant pipelines have long been considered important sites for safety and reliability assessment. In particular, the residual stress in pipeline weldments induced by the welding process must be evaluated accurately before and during service. This study reports an indentation technique for evaluating welding residual stress nondestructively. Indentation load-depth curves were found to shift with the magnitude and direction of the residual stress. Nevertheless, contact depths in the stress-free and stressed states were constant at a specific indentation load. This means that residual stress induces additional load to keep contact depth constant at the same load. By taking these phenomena into account, welding residual stress was obtained directly from the indentation load-depth curve. In addition, the results were compared with values from the conventional hole-drilling and saw-cutting methods.

  Info
Periodical
Key Engineering Materials (Volumes 297-300)
Edited by
Young-Jin Kim, Dong-Ho Bae and Yun-Jae Kim
Pages
2122-2127
DOI
10.4028/www.scientific.net/KEM.297-300.2122
Citation
Y. Choi, Y. H. Lee, J. I. Jang, S. K. Park, K. H. Kim, Y. W. Seo, D. I. Kwon, "Nondestructive Evaluation of Welding Residual Stress in Power Plant Facilities Using Instrumented Indentation Technique ", Key Engineering Materials, Vols. 297-300, pp. 2122-2127, 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: Tatsuya Miyajima, Fukue Nagata, W. Kanematsu, Yoshiyuki Yokogawa, Mototsugu Sakai
927
Authors: Eun Chae Jeon, Min Kyung Baik, Sung Hoon Kim, Baik Woo Lee, Dong Il Kwon
Abstract:A new method [1] to evaluate indentation flow curves using an instrumented indentation test has been applied to many materials for several...
2152
Authors: Jens Gibmeier, Berthold Scholtes
Abstract:Instrumented indentation testing has been carried out on steel samples subjected to uniaxial loading. It is distinguished between purely...
83
Authors: Loredana Santo, Erica Anna Squeo, Federica Trovalusci
Abstract:In this study, an easy and innovative technique for laser welded butt joint characterization is proposed. AISI 304 sheets, 1.25 mm in...
503
Authors: Hong Ping Jin, Wen Yu Yang, Lin Yan
Abstract:In this study, we have used the FE method to investigate the effect of in-plane residual stress and strain-hardening exponent on the indenter...
97