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

Abstract

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
Patent Number(s):
5282907 A
Application Number:
PPN: US 7-915096
Assignee:
PTO; EDB-94-064138
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
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

Citation Formats

Liu, C T, and Takeyama, Masao. Two-phase chromium-niobium alloys exhibiting improved mechanical properties at high temperatures. United States: N. p., 1994. Web.
Liu, C T, & Takeyama, Masao. Two-phase chromium-niobium alloys exhibiting improved mechanical properties at high temperatures. United States.
Liu, C T, and Takeyama, Masao. Tue . "Two-phase chromium-niobium alloys exhibiting improved mechanical properties at high temperatures". United States.
@article{osti_5264022,
title = {Two-phase chromium-niobium alloys exhibiting improved mechanical properties at high temperatures},
author = {Liu, C T and Takeyama, Masao},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {2}
}