An experimental study on fretting wear behavior of cross-contacting Inconel 690 tubes

Title
An experimental study on fretting wear behavior of cross-contacting Inconel 690 tubes
Author(s)
정일섭이명호[이명호]
Keywords
STEAM-GENERATOR TUBE; TEMPERATURE WATER; FRICTION
Issue Date
201110
Publisher
ELSEVIER SCIENCE SA
Citation
NUCLEAR ENGINEERING AND DESIGN, v.241, no.10, pp.4103 - 4110
Abstract
A fretting wear test rig employing a piezoelectric actuator has been developed, which is equipped with a heating and water circulation system. The fretting wear tests of cross-contacting Inconel 690 tubes, which is widely used for power plant steam generator, have been carried out in room temperature ambient and 80 degrees C in-water conditions. Maximum normal load was 55 N, and the sliding amplitude was below 50 mu m. Scars of the mixed-slip and the gross-slip fretting wear have been measured in terms of scar diameter and wear volume. From the relationship between the work rate and the wear rate, a threshold of work rate has been defined, and this is found to be closely related with fretting wear regimes. The wear coefficients have been evaluated in the gross-slip regime. Distinct fretting wear mechanisms have been observed for the two different test conditions from SEM microphotographs. The crack formation, large particle separation and resulting third body effect were significant in room temperature ambient condition. The protective nature of the tribologically transformed layers coupled with non-uniform contact results in the lower wear coefficient while smooth wear scar and extensive abrasion produces higher wear volume in the other condition. (C) 2011 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/24388http://dx.doi.org/10.1016/j.nucengdes.2011.08.024
ISSN
0029-5493
Appears in Collections:
공과대학 > 기계공학부 > Articles
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