Fatigue performance and cyclic softening of F82H, a ferritic martensic steel

Technical Report · Mon Apr 01 04:00:00 EST 1996

DOI:https://doi.org/10.2172/270437· OSTI ID:270437

Stubbins, J. F. ^[1]; Gelles, D. S. ^[2]

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1. Univ. of Illinois, Urbana, IL (United States)
2. Pacific Northwest National Laboratory, Richland, WA (United States)

The room temperature fatigue performance of F82H has been examined. The fatigue life was determined in a series of strain-controlled tests where the stress level was monitored as a function of the number of accrued cycles. Fatigue lives in the range of 10{sup 3} to 10{sup 6} cycles to failure were examined. The fatigue performance was found to be controlled primarily by the elastic strain range over most of the range of fatigue lives examined. Only at low fatigue lives did the plastic strain range contribute to the response. However, when the significant plastic strain did contribute, the material showed a tendency to cyclically soften. That is the load carrying capability of the material degrades with accumulated fatigue cycles. The overall fatigue performance of the F82H alloy was found to be similiar to other advanced martensitic steels, but lower than more common low alloy steels which possess lower yield strengths.

• Research Organization: Oak Ridge National Lab., TN (United States)
• OSTI ID: 270437
• Report Number(s): DOE/ER--0313/19; ORNL/M--5023; ON: DE96010874
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
FERRITIC STEELS
MARTENSITIC STEELS
PERFORMANCE
PROGRESS REPORT
STRAIN SOFTENING
STRESS ANALYSIS
THERMAL FATIGUE
THERMONUCLEAR REACTOR MATERIALS