Cyclic creep of Type 304 stainless steel during unbalanced tension-compression loading at elevated temperature

Journal Article · Sat Mar 01 00:00:00 EST 1980 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02654571· OSTI ID:5418529

Turner, A P.L.; Martin, T J

Samples of Type 304 stainless steel were subjected to cyclic stresses with a positive mean stress at 300 and 560/sup 0/C. Very rapid net elongation was observed whenever the stress limits were such as to produce a plastic strain amplitude of the same order of magnitude as the elastic strain at the peak stress. The maximum mean strain-rate, or cyclic creep rate, for a given peak tensile stress was achieved when the mean stress was just slightly above zero. Increasing the mean stress caused the mean strain rate to decrease. The sensitive dependence of the mean strain-rate on the plastic strain amplitude and inverse dependence on the mean stress indicates that remobilization of dislocations by the reverse strain is an important mechanism for cyclic-creep acceleration. Although rapid cyclic creep was observed at both temperatures, a measurable mean strain rate was found for a much narrower range of stress conditions at 560 than at 300/sup 0/C. The strain accumulated during cyclic creep did not produce any strain hardening, but did influence the shape of the stress-strain curve in a subsequent tensile test.

• Research Organization: Argonne National Lab., IL
• OSTI ID: 5418529
• Journal Information: Metall. Trans., A; (United States), Vol. 11:3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STAINLESS STEEL-304
CREEP
STRAIN RATE
STRAINS
STRESSES
THERMAL CYCLING
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
NICKEL ALLOYS
STAINLESS STEELS
STEELS
360103* - Metals & Alloys- Mechanical Properties