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:
-
- Oak Ridge, TN
- Tokyo, JP
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 869139
- Patent Number(s):
- 5282907
- Assignee:
- Martin Marietta Energy Systems, Inc. ()
- Patent Classifications (CPCs):
-
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
- 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}
}
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Works referenced in this record:
Microstructure and mechanical properties of Laves-phase alloys based on Cr2Nb
journal, February 1991
- Takeyama, M.; Liu, C. T.
- Materials Science and Engineering: A, Vol. 132
The constitution of the chromium-niobium-molybdenum system
journal, February 1961
- Goldschmidt, H. J.; Brand, J. A.
- Journal of the Less Common Metals, Vol. 3, Issue 1