High Temperature Fracture Characteristics of a Nanostructured Ferritic Alloy (NFA)

Journal Article · Fri Jan 01 00:00:00 EST 2010 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2010.09.031· OSTI ID:1000297

Byun, Thak Sang ^[1]; Kim, Jeoung H ^[1]; Ji Hyun, Yoon ^[2]; Hoelzer, David T ^[1]

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1. ORNL
2. Korea Atomic Energy Research Institute

High temperature fracture behavior has been investigated for the nanostructured ferritic alloy 14YWT (SM10). The fracture toughness of the alloy was above 140 MPa m at low temperatures, room temperature (RT) and 200 C, but decreased to a low fracture toughness range of 52 82 MPa m at higher temperatures up to 700 C. This behavior was explained by the fractography results indicating that the unique nanostructure of 14YWT alloy produced shallow plasticity layers at high temperatures and a low-ductility grain boundary debonding occurred at 700 C.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Nuclear Energy (NE)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1000297
• Journal Information: Journal of Nuclear Materials, Vol. 407, Issue 12; ISSN 0022-3115
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FERRITIC STEELS
CHROMIUM ALLOYS
TUNGSTEN ALLOYS
TITANIUM ADDITIONS
YTTRIUM OXIDES
FRACTURE PROPERTIES
NANOSTRUCTURES
PLASTICITY
DUCTILITY
GRAIN BOUNDARIES