Effects of specimen thickness and side-groove on fracture toughness of JN1 austenitic stainless steel rolled plate at liquid helium temperature

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Advances in Cryogenic Engineering

OSTI ID:476722

Shindo, Y; Horiguchi, K; Kobori, T ^[1]

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1. Tohoku Univ., Sendai (Japan); and others

In order to evaluate the fracture toughness (J{sub IC}) of JN1 austenitic stainless steel rolled plate, we performed elastic-plastic fracture toughness tests with standard and modified compact tension specimens at liquid helium temperature. These tests were conducted in accordance with ASTM standards E813-81 and E813-87 for determining J{sub IC} using the unloading compliance method to monitor crack growth. The effects of specimen thickness and side-groove on J{sub IC} and tearing modulus (T{sub mat}) are reported. The final value of physical crack extension was taken as the average of nine measurements using an optical microscope. Fracture surfaces were examined by scanning electron microscopy (SEM) to verify the failure mechanisms. The effects of crack tunneling on the determination of J-integral resistance curves and valid J{sub IC} values, and a difference between ASTM standards E813-81 and E813-87 are also discussed.

• OSTI ID: 476722
• Report Number(s): CONF-950722--
• Journal Information: Advances in Cryogenic Engineering, Journal Name: Advances in Cryogenic Engineering Vol. 42A; ISSN 0065-2482; ISSN ACYEAC
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AUSTENITIC STEELS
FRACTURE PROPERTIES
MAGNETIC CONFINEMENT
SUPERCONDUCTING MAGNETS
TEMPERATURE RANGE 0000-0013 K
THICKNESS