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RESEARCH PAPERS

Creep Crack Growth Behavior in Power Plant Boiler and Steam Pipe Steels

[+] Author and Article Information
A. Saxena, J. Han, K. Banerji

Fracture and Fatigue Research Laboratory, School of Materials Engineering, Georgia Institute of Technology, Atlanta, Ga. 30332

J. Pressure Vessel Technol 110(2), 137-146 (May 01, 1988) (10 pages) doi:10.1115/1.3265578 History: Received December 21, 1987; Online November 05, 2009

Abstract

One of the important ingredients in remaining creep crack growth life assessment of elevated temperature power plant components is the material creep crack growth rate data. This report summarizes the currently available data on Cr-Mo and Cr-Mo-V steels most commonly used in steam pipes and boilers. All data are correlated with the crack-tip parameter, C t . The accompanying creep deformation data and tensile properties are also included. The influence of in-service degradation, test temperature and the welding parameters such as impurity level and post-weld heat treatment (PWHT) on the creep crack growth behavior were examined. It was shown that the influence of nominal material chemistry, service degradation and test temperature can be normalized into a single da /dt versus C t trend for the base materials. It was also shown that the level of impurities and the PWHT can significantly influence the da /dt versus C t behavior in weldments.

Copyright © 1988 by ASME
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