SYMPOSIA PAPER Published: 01 January 1997

Crack Initiation in Low Alloy Steel in High Temperature Water


This paper describes a study of fatigue crack initiation in WB36, a German low alloy steel, tested in high temperature, high purity, water. Flat un-notched, tensile specimens were cycled under load control, with R=0.1, and with a saw-tooth wave form (with a loading time of 30 seconds and an unloading time of 3 seconds). Crack initiation was followed by periodically stopping the test and replicating the surface. The tests were performed at 177°C, in water containing 8ppm O2. H2SO4 additions were also made in some tests to raise the conductivity of the water from 0.06 μS/cm to 0.4–0.5μS/cm. The crack initiation and growth data are correlated with the water chemistry of the test.

Author Information

Solomon, HD
GE R&D Center, Schenectady, NY
DeLair, RE
GE R&D Center, Schenectady, NY
Unruh, AD
, San Jose, CA
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Developed by Committee: G01
Pages: 135–149
DOI: 10.1520/STP19958S
ISBN-EB: 978-0-8031-5357-8
ISBN-13: 978-0-8031-2408-0