Effect of Local Strain Distribution of Cold-Rolled Alloy 690 on Primary Water Stress Corrosion Crack Growth Behavior
Archives of Metallurgy and Materials
2017
No 2
S.-W. Kim
; T.-Y. Ahn
; Y.-S. Lim
; S.-S. Hwang
Metals and Alloys
Nauki Techniczne
<jats:title>Abstract</jats:title><jats:p>This work aims to study the stress corrosion crack growth behavior of cold-rolled Alloy 690 in the primary water of a pressurized water reactor. Compared with Alloy 600, which shows typical intergranular cracking along high angle grain boundaries, the cold-rolled Alloy 690, with its heterogeneous microstructure, revealed an abnormal crack growth behavior in mixed mode, that is, in transgranular cracking near a banded region, and in intergranular cracking in a matrix region. From local strain distribution analysis based on local mis-orientation, measured along the crack path using the electron back scattered diffraction method, it was suggested that the abnormal behavior was attributable to a heterogeneity of local strain distribution. In the cold-rolled Alloy 690, the stress corrosion crack grew through a highly strained area formed by a prior cold-rolling process in a direction perpendicular to the maximum principal stress applied during a subsequent stress corrosion cracking test.</jats:p>
Institute of Metallurgy and Materials Science of Polish Academy of Sciences
;
Commitee on Metallurgy of Polish Academy of Sciences
2017
ISSN 1733-3490
10.1515/amm-2017-0185