ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 8

Cryogenic Fatigue Properties of 304L and 316L Stainless Steels Compared to Mechanical Strength and Increasing Magnetic Permeability

Suzuki, K
Heavy Apparatus Engineering Laboratory, Toshiba Corporation, Yokohama,

Fukakura, J
Heavy Apparatus Engineering Laboratory, Toshiba Corporation, Yokohama,

Kashiwaya, H
Heavy Apparatus Engineering Laboratory, Toshiba Corporation, Yokohama,

(Received 20 January 1987; accepted 13 July 1987)

Abstract

For superconducting magnet applications, the 4 K fatigue life curves of the cryogenic structural materials 304L and 316L stainless steel were obtained using axial-strain control conditions. These curves were compared with others at 77 and 300 K and with data for other 300-series stainless steels in the literature. Increasing magnetic permeability with monotonic tensile and cyclic straining, due to strain-induced martensitic transformation, was also investigated, since 304L and 316L are metastable austenitic stainless steels. 4 K fatigue life curves relating magnetic permeability effects were obtained. Fatigue tests relating magnetic permeability at 77 and 300 K were also conducted for comparison. Finally, a cryogenic fatigue design criterion for preventing mechanical failure and increasing magnetic permeability was considered.

Keywords:
fatigue, cryogenic temperature, stainless steels, martensitic transformation, magnetic permeability

Paper ID: JTE11161J
DOI: 10.1520/JTE11161J
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