Global to push GA events into
skip to main content

Title: Creep-resistant, cobalt-free alloys for high temperature, liquid-salt heat exchanger systems

An essentially Fe- and Co-free alloy is composed essentially of, in terms of weight percent: 6.0 to 7.5 Cr, 0 to 0.15 Al, 0.5 to 0.85 Mn, 11 to 19.5 Mo, 0.03 to 4.5 Ta, 0.01 to 9 W, 0.03 to 0.08 C, 0 to 1 Re, 0 to 1 Ru, 0 to 0.001 B, 0.0005 to 0.005 N, balance Ni, the alloy being characterized by, at 850.degree. C., a yield strength of at least 25 Ksi, a tensile strength of at least 38 Ksi, a creep rupture life at 12 Ksi of at least 25 hours, and a corrosion rate, expressed in weight loss [g/(cm.sup.2 sec)]10.sup.-11 during a 1000 hour immersion in liquid FLiNaK at 850.degree. C., in the range of 3 to 10.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1321909
Assignee:
UT-Battelle, LLC (Oak Ridge, TN) ORNL
Patent Number(s):
9,435,011
Application Number:
13/962,197
Contract Number:
AC05-00OR22725
Resource Relation:
Patent File Date: 2013 Aug 08
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Works referenced in this record:

Microstructural and microchemical mechanisms controlling intergranular stress corrosion cracking in light-water-reactor systems
journal, October 1994

Vibrational Spectra of Fluoro and Oxofluoro Complexes of Nb(V) and Ta(V)
journal, January 1991

Electrochemical Study of Tantalum in Fluoride and Oxofluoride Melts
journal, January 1994
  • Polyakova, L.
  • Journal of The Electrochemical Society, Vol. 141, Issue 11, p. 2982-2988
  • DOI: 10.1149/1.2059269

Processing of Ta2O5 powders for electronic applications
journal, December 2001

An experimental test facility to support development of the fluoride-salt-cooled high-temperature reactor
journal, February 2014