Paper Title:

Crack Growth Anomalies in Base Steel P91 and in HAZ

Periodical Materials Science Forum (Volume 482)
Main Theme Materials Structure & Micromechanics of Fracture
Edited by Jaroslav Pokluda
Pages 383-386
DOI 10.4028/www.scientific.net/MSF.482.383
Citation Jaroslav Balík et al., 2005, Materials Science Forum, 482, 383
Online since April, 2005
Authors Jaroslav Balík, Miloš Janeček, Josef Pešička
Keywords Creep Crack Growth, Ductility, Structure Degradation, Weldment
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Abstract

The growth of cracks in base steel P91 of 9Cr-1Mo class and in intercritical layer of HAZ is measured under creep coditions. For long term tests, a material degradation was detected consisting in an increase of crack growth rate and in a decrease of crack initiation time. An attempt is made to connect these effects with drop in ductility during thermomechanicalexposition.