(The fatigue behavior of ferritic and austenitic steels at elevated temperatures: Progress report)

Technical Report · Fri Jan 01 04:00:00 UTC 1988

OSTI ID:5574914

McEvily, A J

With type 304 austenitic steel we have observed no creep-fatigue interactions down to a frequency of 0.3 Hz. Crack closure occurs in 304 stainless at 538/sup 0/C, whereas it does not in the ferritic alloys investigated. This is attributed to the greater resistance to creep of the austenitic material. The 304 material has also been studied at room temperature with interesting results. Stress-induced phase transformation affects the nature of the crack closure process. In addition it reduces markedly the fatigue notch sensitivity of this alloy. With the 9Cr-2Mo ferritic alloy, a decrease in specimen thickness results in an increase in crack closure and a decrease in crack growth rate. 2 figs.

• Research Organization: Connecticut Univ., Storrs (USA)
• DOE Contract Number: FG02-84ER45109
• OSTI ID: 5574914
• Report Number(s): DOE/ER/45109-T1; ON: DE88006304
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRACK PROPAGATION
DOCUMENT TYPES
FATIGUE
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
NICKEL ALLOYS
PROGRESS REPORT
STAINLESS STEEL-304
STAINLESS STEELS
STEELS