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Title: Two-phase chromium-niobium alloys exhibiting improved mechanical properties at high temperatures

The specification discloses chromium-niobium alloys which exhibit improved mechanical properties at high temperatures in the range of 1250 C and improved room temperature ductility. The alloys contain a Cr[sub 2]Nb-rich intermetallic phase and a Cr-rich phase with an overall niobium concentration in the range of from about 5 to about 18 at. %. The high temperature strength is substantially greater than that of state of the art nickel-based superalloys for enhanced high temperature service. Further improvements in the properties of the compositions are obtained by alloying with rhenium and aluminum; and additional rare-earth and other elements. 14 figures.
Inventors:
;
Issue Date:
OSTI Identifier:
5264022
Assignee:
PTO; EDB-94-064138
Patent Number(s):
US 5282907; A
Application Number:
PPN: US 7-915096
Contract Number:
AC05-84OR21400
Resource Relation:
Patent File Date: 16 Jul 1992
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CHROMIUM ALLOYS; MECHANICAL PROPERTIES; NIOBIUM ALLOYS; ALUMINIUM ALLOYS; HEAT RESISTING ALLOYS; MICROSTRUCTURE; RARE EARTH ALLOYS; RHENIUM ALLOYS; ALLOYS; HEAT RESISTANT MATERIALS; MATERIALS; 360103* - Metals & Alloys- Mechanical Properties