Journal Published Online: 01 January 1989
Volume 17, Issue 1

Linear-Elastic Fracture of High-Nitrogen Austenitic Stainless Steels at Liquid Helium Temperature



Four commercial Fe-Cr-Ni-Mn austenitic stainless steels containing 0.14, 0.26, 0.28, and 0.37 wt% N were fractured in liquid helium at 4 K, and measurements of the linear-elastic plane-strain stress-intensity factor, KIc, were made. Interstitial nitrogen significantly strengthens these steels at low temperatures so that brittle fractures occur under plane strain conditions at 4 K despite moderate ductility in uniaxial tension. The brittle fracture mechanism at 4 K involves a form of cleavage or slip-band cracking as evidenced by the formation of transgranular facets on {111} planes.

Author Information

Tobler, RL
National Bureau of Standards, Boulder, CO
Reed, RP
National Bureau of Standards, Boulder, CO
Purtscher, PT
National Bureau of Standards, Boulder, CO
Pages: 6
Price: $25.00
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Stock #: JTE11533J
ISSN: 0090-3973
DOI: 10.1520/JTE11533J