skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Patent ·
OSTI ID:1321909

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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Number(s):
9,435,011
Application Number:
13/962,197
OSTI ID:
1321909
Resource Relation:
Patent File Date: 2013 Aug 08
Country of Publication:
United States
Language:
English

References (52)

Cobalt Base Alloys and Cast Articles patent July 1954
High Temperature Chromium-Molybdenum Alloy patent April 1962
Ductile Cobalt-Base Alloy patent December 1658
Electrodeposition of Refractory Metals patent May 1969
Process of Producing Nickel Chromium Alloy Products patent May 1974
Nickel-base heat resistant and wear resistant alloy patent November 1975
Process for the improvement of refractory composite materials comprising a matrix consisting of a superalloy and reinforcing fibers consisting of a metal carbide patent October 1976
Forgeable nickel-base super alloy patent March 1980
Oxidation-resistant nickel alloy patent October 1984
Method for producing corrosion resistant high strength superalloy articles patent April 1985
Precipitation-hardening nickel-base alloy and method of producing same patent March 1987
Nickel-base alloys for high-temperature forging dies usable in atmosphere patent April 1988
Nickel-chromium alloy of improved fatigue strength patent August 1988
Low thermal expansion superalloy patent April 1989
Process for thermally stress-relieving a tube patent April 1989
Nickel-base alloy patent October 1989
Heat resistant alloys patent December 1991
Nickel aluminide base single crystal alloys patent December 1992
Heat treatment of Alloy 718 for improved stress corrosion cracking resistance patent September 1993
High temperature creep and oxidation resistant chromium silicide matrix alloy containing molybdenum patent July 1994
Nickel-based alloy with chromium, molybdenum and tantalum patent June 1996
Alloy based on a silicide containing at least chromium and molybdenum patent February 1998
Nickel-cobalt based alloys patent March 1999
High corrosion resistant high strength superalloy and gas turbine utilizing the alloy patent June 1999
Surface treatment of austenitic Ni-Fe-Cr-based alloys for improved resistance to intergranular-corrosion and-cracking patent February 2002
Surface treatment of austenitic Ni-Fe-Cr based alloys for improved resistance to intergranular corrosion and intergranular cracking patent August 2003
Corrosion and wear resistant alloy patent March 2004
Nickel-based alloy for high-temperature technology patent September 2004
Nickel-base superalloy composition and its use in single-crystal articles patent June 2005
Nickel base superalloys and turbine components fabricated therefrom patent June 2005
Superalloy for single crystal turbine vanes patent March 2006
Nickel-based alloys and articles made therefrom patent November 2010
Superalloy compositions, articles, and methods of manufacture patent April 2012
Austenitic heat resistant alloy patent November 2012
Age-Hardenable, Corrosion Resistant NI-CR-MO Alloys patent-application March 2005
Low thermal expansion Ni-base superalloy patent-application December 2007
System and method for predicting compatibility of fluids with metals patent-application May 2008
Treatment Process for Bars patent-application February 2009
Nickel base super alloy patent-application April 2009
Straight Tube Heat Exchanger with Expansion Joint patent-application August 2009
Superalloy compositions, articles, and methods of manufacture patent-application January 2010
Method of Heat Treatment for Desensitizing a Nikel-Based Alloy Relative to Environmentally-Assisted Cranking, in Particular for a Nuclear Reactor Fuel Assembly and for a Nuclear Reactor, and a Part Made of the Alloy and Subjected to the Treatment patent-application May 2010
Nickel-Base Superalloys and Components Formed Thereof patent-application December 2010
Cast Heat-Resistant Austenitic Steel with Improved Temperature Creep Properties and Balanced Alloying Element Additions and Methodology for Development of the Same patent-application December 2010
Nickel-Chromium-Alloy patent-application November 2011
Heat-Resistant Superalloy patent-application November 2012
High Strength Alloys for High Temperature Service in Liquid-Salt Cooled Energy Systems patent-application September 2014
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
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