SEDL / STP / STP833-EB / STP32554S

Recent Advances in Crack-Arrest Technology

Rosenfield, AR
Battelle-Columbus Laboratories, Columbus, Ohio

Mincer, PN
Battelle-Columbus Laboratories, Columbus, Ohio

Marschall, CW
Battelle-Columbus Laboratories, Columbus, Ohio

Markworth, AJ
Battelle-Columbus Laboratories, Columbus, Ohio

Pages: 16    Published: Jan 1984

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Abstract

Statistical analysis of the variability of crack-arrest toughness (K^a) is reviewed. The standard deviation of K^a is 12 MPa · m^1/2 for an individual heat of low-alloy steel and 15 MPa · m^1/2 when data for all heats are referred to the Charpy 41-J (30 ft-lb) temperature. These results aid in the definition of acceptable size limitations for crack-arrest test specimens. Miniature specimens (50 by 50 by 12.7 mm) are shown to give acceptably conservative results when tested in the vicinity of the reference transition temperature.