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Intermediate Strength Alloys for High Temperature Service in Liquid-Salt Cooled Energy Systems

United States Patent Application

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An alloy consists essentially of, in terms of weight percent: 6 to 8.5 Cr, 5.5 to 13.5 Mo, 0.4 to 7.5 W, 1 to 2 Ti, 0.7 to 0.85 Mn, 0.05 to 0.3 Al, up to to 0.1 Co, 0.08 to 0.5 C, 1 to 5 Ta, 1 to 4 Nb, 1 to 3 Hf, balance Ni. The alloy is characterized by, at C., a yield strength of at least 36 Ksi, a tensile strength of at least 40 Ksi, a creep rupture life at 12 Ksi of at least 72.1 hours, and a corrosion rate, expressed in weight loss [g/(cm2sec)].times.10.sup.-11 during a 1000 hour immersion in liquid FLiNaK at C., in the range of 8 to 25.
Muralidharan, Govindarajan (Knoxville, TN), Wilson, Dane Francis (Oak Ridge, TN), Holcomb, David Eugene (Oak Ridge, TN)
14/ 152,215
January 10, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH [0002] The United States Government has rights in this invention pursuant to contract no. DE-AC05-00OR22725 between the United States Department of Energy and UT-Battelle, LLC.