Creep-Fatigue Interaction and Cyclic Strain Analysis in P92 Steel Based on Test
Document Type
Journal Article
Publisher
Springer New York LLC
School
School of Engineering
RAS ID
19137
Funders
NSFC, National Natural Science Foundation of China
Grant Number
51201097
Abstract
This work focused on the interaction of creep and fatigue and cyclic strain analysis in high-chromium ferritic P92 steel based on load-controlled creep-fatigue (CF) tests and conventional creep test at 873 K. Mechanical testing shows that the cyclic load inhibits the propagation of creep damage in the P92 steel and CF interaction becomes more severe with the decrease in the holding period duration and stress ratio. These results are also verified by the analysis of cyclic strain. The fatigue lifetime reduces with the increasing of the holding period duration and it does not reduce much with the increasing stress ratio especially under the conditions of long holding period duration. The cyclic strains (i.e., the strain range and creep strain) of CF tests consist of three stages, which is the same as those for the conventional creep behavior. The microscopic fracture surface observations illustrated that two different kinds of voids are observed at the fracture surfaces and Laves phase precipitates at the bottom of the voids.
DOI
10.1007/s11665-015-1446-9
Access Rights
subscription content
Comments
Ji, D., Zhang, L.-C., Ren, J., Wang, D. (2015). Creep-Fatigue Interaction and Cyclic Strain Analysis in P92 Steel Based on Test in Journal of Materials Engineering and Performance, 24(4), 1441-1451. Available here.