Fracture Toughness Assessment for JN1 Austenitic Stainless Steel Rolled Plate at Liquid Helium Temperature.
- 1 January 1994
- journal article
- Published by Cryogenic Association of Japan in Teion Kogaku (Journal of Cryogenics and Superconductivity Society of Japan)
- Vol. 29 (8) , 396-403
- https://doi.org/10.2221/jcsj.29.396
Abstract
In order to evaluate the fracture toughness of CSUS-JN 1 austenitic stainless steel rolled plate for superconducting magnet structures of magnetic fusion reactors, we have performed elastic-plastic fracture toughness testing at 4.2K. 1T compact test specimens and computer controlled unloading compliance method are used for the JIC tests. The effects of specimen thickness and side-groove on JIC and Tmat are examined. SEM fractograph reveals the effect of specimen thickness on fracture surface. The effect of crack tunneling on determination of J-R curve and JIC, and a difference between ASTM E 813-81 and E 813-87 are also discussed.Keywords
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