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http://dx.doi.org/10.3795/KSME-A.2003.27.11.1979

The Effect of Degradation on the Fretting fatigue for 1Cr-0.5Mo Steel  

Kwon, Jae-Do (영남대학교 기계공학부)
Choi, Sung-Jong (영남대학교 기계공학부)
Kim, Kyung-Soo (영남대학교 대학원 기계공학부)
Bae, Yong-Tak (영남대학교 대학원 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.27, no.11, 2003 , pp. 1979-1985 More about this Journal
Abstract
Fretting is a kind of surface degradation mechanism observed in mechanical components and structures. The fretting damage decreases in 50-70% of the plain fatigue strength. This may be observed in the fossil power plant and the nuclear power plant used in special environments and various loading conditions. The thermal degradation of material is observed when the heat resisting steel is exposed for long period time at the high temperature. In the present study, the degraded 1Cr-0.5Mo steel used for long period time at high temperature (about 515$^{\circ}C$) and artificially reheat-treated materials are prepared. These materials are used for evaluating an effect of thermal aging on the fretting fatigue behavior. Through the experiment, it is found that the fretting fatigue endurance limit of the reheat-treated 1Cr-0.5Mo steel decreased about 46% from the non-fretting fatigue endurance limit, while the fretting fatigue endurance limit of the degraded 1Cr-0.5Mo steel decreased about 53% from the non-fretting fatigue endurance limit. The maximum value of fatigue endurance limit difference is observed as 57%(244 MPa) between the fretting fatigue of degraded material and non-fretting fatigue of reheat-treated material. These results can be a basic data to a structural integrity evaluation of heat resisting steel considered to thermal degradation effect.
Keywords
Fretting Fatigue; Degradation; Relative Slip; Friction Force; Gross Slip; Partial Slip; Debris; Non- propagation Crack;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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[ 材上賀國 ] / 博士學位論文, 大阪大學工學部
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