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Title: Effect of loading mode on the fracture toughness of a reduced activation ferritic/martensitic stainless steel

Abstract

The critical J integrals of mode I (J{sub IC}), mixed-mode I/III (J{sub MC}), and mode III (J{sub IIIC}) were examined for a ferritic stainless steel (F-82H) at ambient temperature. A determination of J{sub MC} was made using modified compact-tension specimens. Different ratios of tension/shear stress were achieved by varying the principal axis of the crack plane between 0 and 55 degrees from the load line. The results showed that J{sub MC}s and tearing moduli (T{sub M}) varied with the crack angles and were lower than their mode I and mode III counterparts. Both the minimum J{sub MC} and T{sub M} occurred at a crack angle between 40 and 50 degrees, where {sigma}{sub i}/{sigma}{sub iii} was 1.2 to 0.84. The J{sub min} was 240 kJ/m{sup 2}, and ratios of J{sub IC}/J{sub min} and J{sub IIIC}/J{sub min} were about 2.1 and 1.9, respectively. Morphology of fracture surfaces was consistent with the change of J{sub MC} and T{sub M} values. While the upper shelf-fracture toughness of F-82H depends on loading mode, the J{sub min} remains very high. Other important considerations include the effect of mixed-mode loading on the DBT temperature, and effects of hydrogen and irradiation on J{sub min}.

Authors:
;  [1]; ;  [2]
  1. Washington State Univ., Pullman, WA (United States)
  2. Pacific Northwest Lab., Richland, WA (United States)
Publication Date:
Research Org.:
Pacific Northwest Lab., Richland, WA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10108416
Report Number(s):
PNL-SA-22545; CONF-930928-16
ON: DE94004290; TRN: 94:000923
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: 6. international conference on fusion reactor materials,Stresa (Italy),27 Sep - 1 Oct 1993; Other Information: PBD: Sep 1993
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 36 MATERIALS SCIENCE; STAINLESS STEELS; FRACTURE PROPERTIES; MATERIALS TESTING; THERMONUCLEAR REACTOR MATERIALS; IRRADIATION; SHEAR; CRACKS; THERMONUCLEAR REACTOR WALLS; BREEDING BLANKETS; 700420; 360103; PLASMA-FACING COMPONENTS; MECHANICAL PROPERTIES

Citation Formats

Li, H, Hirth, J P, Jones, R H, and Gelles, D S. Effect of loading mode on the fracture toughness of a reduced activation ferritic/martensitic stainless steel. United States: N. p., 1993. Web.
Li, H, Hirth, J P, Jones, R H, & Gelles, D S. Effect of loading mode on the fracture toughness of a reduced activation ferritic/martensitic stainless steel. United States.
Li, H, Hirth, J P, Jones, R H, and Gelles, D S. 1993. "Effect of loading mode on the fracture toughness of a reduced activation ferritic/martensitic stainless steel". United States. https://www.osti.gov/servlets/purl/10108416.
@article{osti_10108416,
title = {Effect of loading mode on the fracture toughness of a reduced activation ferritic/martensitic stainless steel},
author = {Li, H and Hirth, J P and Jones, R H and Gelles, D S},
abstractNote = {The critical J integrals of mode I (J{sub IC}), mixed-mode I/III (J{sub MC}), and mode III (J{sub IIIC}) were examined for a ferritic stainless steel (F-82H) at ambient temperature. A determination of J{sub MC} was made using modified compact-tension specimens. Different ratios of tension/shear stress were achieved by varying the principal axis of the crack plane between 0 and 55 degrees from the load line. The results showed that J{sub MC}s and tearing moduli (T{sub M}) varied with the crack angles and were lower than their mode I and mode III counterparts. Both the minimum J{sub MC} and T{sub M} occurred at a crack angle between 40 and 50 degrees, where {sigma}{sub i}/{sigma}{sub iii} was 1.2 to 0.84. The J{sub min} was 240 kJ/m{sup 2}, and ratios of J{sub IC}/J{sub min} and J{sub IIIC}/J{sub min} were about 2.1 and 1.9, respectively. Morphology of fracture surfaces was consistent with the change of J{sub MC} and T{sub M} values. While the upper shelf-fracture toughness of F-82H depends on loading mode, the J{sub min} remains very high. Other important considerations include the effect of mixed-mode loading on the DBT temperature, and effects of hydrogen and irradiation on J{sub min}.},
doi = {},
url = {https://www.osti.gov/biblio/10108416}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Sep 01 00:00:00 EDT 1993},
month = {Wed Sep 01 00:00:00 EDT 1993}
}

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