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Kim, Ji Hyun
UNIST Nuclear Innovative Materials Laboratory(UNIMAT)
Research Interests
  • High temperature water corrosion
  • Liquid metal corrosion
  • Material degradation simulation

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Techniques for intergranular crack formation and assessment in alloy 600 base and alloy 182 weld metals

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Title
Techniques for intergranular crack formation and assessment in alloy 600 base and alloy 182 weld metals
Author
Lee, Tae HyunHwang, Il SoonKim, Hong DeokKim, Ji Hyun
Issue Date
2015-02
Publisher
KOREAN NUCLEAR SOC
Citation
NUCLEAR ENGINEERING AND TECHNOLOGY, v.47, no.1, pp.102 - 114
Abstract
Background: A technique developed to produce artificial intergranular stress corrosion cracks in structural components was applied to thick, forged alloy 600 base and alloy 182 weld metals for use in the qualification of nondestructive examination techniques for welded components in nuclear power plants. Methods: An externally controlled procedure was demonstrated to produce intergranular stress corrosion cracks that are comparable to service-induced cracks in both the base and weld metals. During the process of crack generation, an online direct current potential drop method using array probes was used to measure and monitor the sizes and shapes of the cracks. Results: A microstructural characterization of the produced cracks revealed realistic conformation of the crack faces unlike those in machined notches produced by an electrodischarge machine or simple fatigue loading using a universal testing machine. Conclusion: A comparison with a destructive metallographic examination showed that the characteristics, orientations, and sizes of the intergranular cracks produced in this study are highly reproducible. ⓒ 2015, Published by Elsevier Korea LLC on behalf of Korean Nuclear Society
URI
https://scholarworks.unist.ac.kr/handle/201301/11108
URL
http://www.sciencedirect.com/science/article/pii/S1738573314000035#
DOI
10.1016/j.net.2014.08.002
ISSN
1738-5733
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