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Title: Nickel aluminide alloy suitable for structural applications

Abstract

Alloys for use in structural applications based upon NiAl to which are added selected elements to enhance room temperature ductility and high temperature strength. Specifically, small additions of molybdenum produce a beneficial alloy, while further additions of boron, carbon, iron, niobium, tantalum, zirconium and hafnium further improve performance of alloys at both room temperature and high temperatures. A preferred alloy system composition is Ni--(49.1.+-.0.8%)Al--(1.0.+-.0.8%)Mo--(0.7.+-.0.5%)Nb/Ta/Zr/Hf--(nearly zero to 0.03%)B/C, where the % is at. % in each of the concentrations. All alloys demonstrated good oxidation resistance at the elevated temperatures. The alloys can be fabricated into components using conventional techniques.

Inventors:
 [1]
  1. Oak Ridge, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
871405
Patent Number(s):
5725691
Assignee:
Lockheed Martin Energy Systems, Inc. (Oak Ridge, TN)
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:
nickel; aluminide; alloy; suitable; structural; applications; alloys; based; nial; added; selected; elements; enhance; temperature; ductility; strength; specifically; additions; molybdenum; produce; beneficial; boron; carbon; iron; niobium; tantalum; zirconium; hafnium; improve; performance; temperatures; preferred; composition; ni-; 49; al-; mo-; nb; zr; hf-; nearly; zero; 03; concentrations; demonstrated; oxidation; resistance; elevated; fabricated; components; conventional; techniques; temperature strength; oxidation resistance; nickel aluminide; aluminide alloy; temperature ductility; elevated temperatures; elevated temperature; conventional techniques; structural applications; applications based; alloy suitable; improve performance; preferred alloy; selected element; /148/420/

Citation Formats

Liu, Chain T. Nickel aluminide alloy suitable for structural applications. United States: N. p., 1998. Web.
Liu, Chain T. Nickel aluminide alloy suitable for structural applications. United States.
Liu, Chain T. Thu . "Nickel aluminide alloy suitable for structural applications". United States. https://www.osti.gov/servlets/purl/871405.
@article{osti_871405,
title = {Nickel aluminide alloy suitable for structural applications},
author = {Liu, Chain T},
abstractNote = {Alloys for use in structural applications based upon NiAl to which are added selected elements to enhance room temperature ductility and high temperature strength. Specifically, small additions of molybdenum produce a beneficial alloy, while further additions of boron, carbon, iron, niobium, tantalum, zirconium and hafnium further improve performance of alloys at both room temperature and high temperatures. A preferred alloy system composition is Ni--(49.1.+-.0.8%)Al--(1.0.+-.0.8%)Mo--(0.7.+-.0.5%)Nb/Ta/Zr/Hf--(nearly zero to 0.03%)B/C, where the % is at. % in each of the concentrations. All alloys demonstrated good oxidation resistance at the elevated temperatures. The alloys can be fabricated into components using conventional techniques.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

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Works referenced in this record:

Brittle fracture and grain boundary chemistry of microalloyed NiAl
journal, April 1990