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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.degree. 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.

Inventors:
 [1];  [2]
  1. (Oak Ridge, TN)
  2. (Tokyo, JP)
Issue Date:
Research Org.:
LOCKHEED MARTIN ENRGY SYST INC
OSTI Identifier:
869139
Patent Number(s):
5282907
Assignee:
Martin Marietta Energy Systems, Inc. () ORNL
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
two-phase; chromium-niobium; alloys; exhibiting; improved; mechanical; properties; temperatures; specification; discloses; exhibit; range; 1250; degree; temperature; ductility; contain; nb-rich; intermetallic; phase; cr-rich; overall; niobium; concentration; 18; strength; substantially; nickel-based; superalloys; enhanced; service; improvements; compositions; obtained; alloying; rhenium; aluminum; additional; rare-earth; elements; metallic phase; exhibit improved; temperature strength; temperature ductility; improved mechanical; mechanical properties; specification discloses; alloys contain; exhibiting improved; intermetallic phase; rich phase; chromium-niobium alloys; niobium alloys; niobium alloy; alloys exhibiting; /148/420/

Citation Formats

Liu, Chain T., and Takeyama, Masao. Two-phase chromium-niobium alloys exhibiting improved mechanical properties at high temperatures. United States: N. p., 1994. Web.
Liu, Chain T., & Takeyama, Masao. Two-phase chromium-niobium alloys exhibiting improved mechanical properties at high temperatures. United States.
Liu, Chain T., and Takeyama, Masao. Sat . "Two-phase chromium-niobium alloys exhibiting improved mechanical properties at high temperatures". United States. https://www.osti.gov/servlets/purl/869139.
@article{osti_869139,
title = {Two-phase chromium-niobium alloys exhibiting improved mechanical properties at high temperatures},
author = {Liu, Chain T. and Takeyama, Masao},
abstractNote = {The specification discloses chromium-niobium alloys which exhibit improved mechanical properties at high temperatures in the range of 1250.degree. 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

Patent:

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