SYMPOSIA PAPER Published: 01 January 1981
STP28801S

Strength/Toughness Relationship for Interstitially Strengthened AISI 304 Stainless Steels at 4 K Temperature

Source

A study was conducted to determine the effects of carbon and nitrogen on the 4 K fracture properties of an Fe-18Cr-10Ni austenitic stainless steel having a base composition corresponding to AISI 304. J-integral fracture toughness tests using 24.5-mm-thick compact specimens (TL orientation) were performed in a liquid helium environment on nine steel heats having carbon plus nitrogen (C+N) contents between 0.067 and 0.325 weight percent. The fracture toughness decreased with increasing C+N content. The KIc estimates obtained at 4 K ranged from 337 to 123 MPa·m1/2, exhibiting an inverse dependence on tensile yield stress. A computer-aided J-integral test facility was implemented to conduct this study. This new facility improves measurement accuracy, conserves material specimens and testing time, and systematizes test procedures.

Author Information

Tobler, RL
National Bureau of Standards, Boulder, Colo.
Read, DT
National Bureau of Standards, Boulder, Colo.
Reed, RP
National Bureau of Standards, Boulder, Colo.
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Details
Developed by Committee: E08
Pages: 250–268
DOI: 10.1520/STP28801S
ISBN-EB: 978-0-8031-4809-3
ISBN-13: 978-0-8031-0732-8