In-vacuum cyclic fatigue behavior of Vanstar-7 at elevated temperatures

Conference · Tue Dec 31 23:00:00 EST 1985 · Trans. Am. Nucl. Soc.; (United States)

OSTI ID:5385039

Liu, K C

Refractory metal alloys have been proposed for fusion reactor and space power applications because of their high-temperature strength, low thermal stress properties, good compatibility with liquid-metal coolants and radiation resistance. Little is known, however, about the cyclic fatigue properties that are important to some fusion reactor systems that operate in thermal cycles. This paper presents limited results of in-vacuum cyclic fatigue tests on Vanstar-7 (9 Cr-3 Fe-Zr) at room temperatures, 550, and 650/sup 0/C. Miniature hourglass-shaped specimens were used with a gauge diameter of 3.18 mm. The material was annealed 1 h in vacuum at 1400/sup 0/C before machining, to produce an average grain size of ASTM No.7. The specimens were stress relieved for 0.5 h at 1400/sup 0/C after machining.

• Research Organization: Oak Ridge National Lab., TN
• OSTI ID: 5385039
• Report Number(s): CONF-860610-
• Journal Information: Trans. Am. Nucl. Soc.; (United States), Journal Name: Trans. Am. Nucl. Soc.; (United States) Vol. 52; ISSN TANSA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALLOYS
CHROMIUM ALLOYS
FAILURES
FATIGUE
IRON ALLOYS
MATERIALS
MECHANICAL PROPERTIES
NESDPS Office of Nuclear Energy Space and Defense Power Systems
STRAINS
STRESSES
TEMPERATURE DEPENDENCE
THERMAL FATIGUE
THERMONUCLEAR REACTOR MATERIALS
VANADIUM ALLOYS
VANADIUM BASE ALLOYS
VANSTAR 7
ZIRCONIUM ALLOYS