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Crack Initiation Factor by Impact Fretting Wear at INCONEL Alloy for Steam Generator Tube in Nuclear Power Plants

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Abstract:

Inconel alloy such as alloy 600 and alloy 690 is widely used as the steam generator tube materials in the nuclear power plants. The impact fretting wear tests were performed to investigate wear mechanism between tube alloy and 409 stainless steel tube support plates in the simulated steam generator operating conditions, pressure of 15MPa, high temperature water of 290°C and low dissolved oxygen(<10 ppb). From investigation of wear test specimens by the SEM and EDS analysis, hammer imprint, which is known to be an actual damaged wear pattern, has been observed on the worn surface, and fretting wear mechanism was investigated. Wear progression of impact-fretting wear also has been examined. It was observed that titanium rich phase contributes to the formation of voids and cracks in sub-layer of fretting wear damage by impact fretting wear.

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Periodical:

Advanced Materials Research (Volumes 26-28)

Pages:

1269-1272

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.26-28.1269

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Online since:

October 2007

Authors:

Chi Yong Park, Jeong Kun Kim, Tae Ryong Kim, Sun Young Cho, Hyun Ik Jeon

Keywords:

Crack Initiation, Impact-Fretting Wear, Inconel Alloy, Steam Generator Tube, Wear Mechanism

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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References

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