High strength alloys for high temperature service in liquid-salt cooled energy systems

Holcomb, David E.; Muralidharan, Govindarajan; Wilson, Dane F.

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Title: High strength alloys for high temperature service in liquid-salt cooled energy systems

Abstract

An essentially cobalt-free alloy consists essentially of, in terms of weight percent: 6.3 to 7.2 Cr, 0.5 to 2 Al, 0 to 5 Fe, 0.7 to 0.8 Mn, 9 to 12.5 Mo, 0 to 6 Ta, 0.75 to 3.5 Ti, 0.01 to 0.25 Nb, 0.2 to 0.6 W, 0.02 to 0.04 C, 0 to 0.001 B, 0.0001 to 0.002 N, balance Ni. The alloy is characterized by a .gamma.' microstructural component in the range of 3 to 17.6 weight percent of the total composition. The alloy is further characterized by, at 850.degree. C., a yield strength of at least 60 Ksi, a tensile strength of at least 70 Ksi, a creep rupture life at 12 Ksi of at least 700 hours, and a corrosion rate, expressed in weight loss [g/(cm.sup.2sec)]10.sup.-11 during a 1000 hour immersion in liquid FLiNaK at 850.degree. C., in the range of 5.5 to 17.

Inventors:: Holcomb, David E.; Muralidharan, Govindarajan; Wilson, Dane F.

Issue Date:: 2017-01-10

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1338928

Patent Number(s):: 9540714

Application Number:: 13/834,985

Assignee:: UT-BATTELLE, LLC (Oak Ridge, TN)

Patent Classifications (CPCs):: C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS

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C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
C22C19/057 - {with the maximum Cr content being less 10%}

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DOE Contract Number:: AC05-00OR22725

Resource Type:: Patent

Resource Relation:: Patent File Date: 2013 Mar 15

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

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                    Holcomb, David E., Muralidharan, Govindarajan, and Wilson, Dane F. High strength alloys for high temperature service in liquid-salt cooled energy systems.  United States: N. p., 2017. 
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                    Holcomb, David E., Muralidharan, Govindarajan, & Wilson, Dane F. High strength alloys for high temperature service in liquid-salt cooled energy systems.  United States.

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                    Holcomb, David E., Muralidharan, Govindarajan, and Wilson, Dane F. Tue .  
        "High strength alloys for high temperature service in liquid-salt cooled energy systems".  United States.  https://www.osti.gov/servlets/purl/1338928.

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@article{osti_1338928,

  title        = {High strength alloys for high temperature service in liquid-salt cooled energy systems},

  author       = {Holcomb, David E. and Muralidharan, Govindarajan and Wilson, Dane F.},

  abstractNote = {An essentially cobalt-free alloy consists essentially of, in terms of weight percent: 6.3 to 7.2 Cr, 0.5 to 2 Al, 0 to 5 Fe, 0.7 to 0.8 Mn, 9 to 12.5 Mo, 0 to 6 Ta, 0.75 to 3.5 Ti, 0.01 to 0.25 Nb, 0.2 to 0.6 W, 0.02 to 0.04 C, 0 to 0.001 B, 0.0001 to 0.002 N, balance Ni. The alloy is characterized by a .gamma.' microstructural component in the range of 3 to 17.6 weight percent of the total composition. The alloy is further characterized by, at 850.degree. C., a yield strength of at least 60 Ksi, a tensile strength of at least 70 Ksi, a creep rupture life at 12 Ksi of at least 700 hours, and a corrosion rate, expressed in weight loss [g/(cm.sup.2sec)]10.sup.-11 during a 1000 hour immersion in liquid FLiNaK at 850.degree. C., in the range of 5.5 to 17.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2017},

  month        = {1}

}

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