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Title: Low-cost, high-strength Fe--Ni--Cr alloys for high temperature exhaust valve application

An Fe--Ni--Cr alloy is composed essentially of, in terms of wt. %: 2.4 to 3.7 Al, up to 1.05 Co, 14.8 to 15.9 Cr, 25 to 36 Fe, up to 1.2 Hf, up to 4 Mn, up to 0.6 Mo, up to 2.2 Nb, up to 1.05 Ta, 1.9 to 3.6 Ti, up to 0.08 W, up to 0.03 Zr, 0.18 to 0.27 C, up to 0.0015 N, balance Ni, wherein, in terms of atomic percent: 8.5.ltoreq.Al+Ti+Zr+Hf+Ta.ltoreq.11.5, 0.53.ltoreq.Al/(Al+Ti+Zr+Hf+Ta).ltoreq.0.65, and 0.16.ltoreq.Cr/(Fe+Ni+Cr+Mn).ltoreq.0.21, the alloy being essentially free of Cu, Si, and V.
Inventors:
Issue Date:
OSTI Identifier:
1379209
Assignee:
UT-Battelle, LLC ORNL
Patent Number(s):
9,752,468
Application Number:
14/497,550
Contract Number:
AC05-00OR22725
Resource Relation:
Patent File Date: 2014 Sep 26
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

Works referenced in this record:

Nickel-Chromium-Alloy
patent-application, November 2011

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