Fatigue of chromium-ferritic steels at elevated temperatures. Final report, July 1, 1982-June 30, 1984

Technical Report · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5826784

McEvily, A J

The fatigue crack growth characteristics of ferritic steels 2 1/4Cr-1Mo, modified 9Cr-1Mo, and 9Cr-2Mo steels have been investigated at 538/sup 0/C in vacuum and compared to results obtained at room temperature. Despite marked differences in initial mechanical properties the fatigue crack growth behavior at 538/sup 0/C was remarkably similar. Further crack closure was greatly reduced at the elevated temperature leading to a loss of R-dependency on crack growth. Results of room in elevated temperature tests could be correlated by means of the change in Young's modulus. Additional studies of its effect of processing and electron beam welding on low-cycle fatigue properties have also been investigated. Work on creep crack growth of ferritic steels has been initiated. 12 figures, 3 tables.

• Research Organization: Connecticut Univ., Storrs (USA). Dept. of Metallurgy
• DOE Contract Number: AC02-82ER12065
• OSTI ID: 5826784
• Report Number(s): DOE/ER/12065-1; ON: DE85007735
• 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
CRACK PROPAGATION
CREEP
ELECTRON BEAM WELDING
FABRICATION
FATIGUE
FERRITIC STEELS
HIGH TEMPERATURE
IRON ALLOYS
IRON BASE ALLOYS
JOINING
MECHANICAL PROPERTIES
STEELS
WELDING