Fatigue strength of Inconel 625 plate and weldments used in the DIII-D configuration vacuum vessel

Conference · Sat Dec 01 04:00:00 EST 1984

OSTI ID:5981753

Trester, P W; Kaae, J L; Gallix, R

The Doublet III-D vacuum vessel will enable fusion experiments with large dee-configuration plasmas in the tokamak device at GA Technologies Inc. The vessel is a welded structure of Ni-Cr-Mo-Nb alloy Inconel 625, in the forms of mill-annealed plate and sheet. An emphasis was placed on spceifying material with small grain size to enhance fatigue resistance. Fatigue strength was determined by tension-compression axial strain cycling of specimens excised from stock plate 25 mm thick. In addition, tests were conducted on gas-tungsten-arc weldments. The strain ranges and the resulting alternating, which produced fatigue lives between 10/sup 3/ and 10/sup 6/ cycles, were determined in the test program. Comparisons are presented with published data obtained using the rotating-beam test method. A discussion is also presented on the effect of the grain size on fatigue strength.

• Research Organization: General Atomic Co., San Diego, CA (USA)
• DOE Contract Number: AT03-84ER51044
• OSTI ID: 5981753
• Report Number(s): GA-A-17791; CONF-841246-23; ON: DE85008276
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALLOYS
CHROMIUM ALLOYS
CONTAINERS
DOUBLET REACTORS
FATIGUE
INCONEL 625
INCONEL ALLOYS
IRON ALLOYS
JOINTS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
PRESSURE VESSELS
STRAINS
TANTALUM ALLOYS
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
WELDED JOINTS