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Title: Nickel aluminide alloys with improved weldability

Weldable nickel aluminide alloys which are essentially free, if not entirely free, of weld hot cracking are provided by employing zirconium concentrations in these alloys of greater than 2.6 wt. % or sufficient to provide a substantial presence of Ni--Zr eutectic phase in the weld so as to prevent weld hot cracking. Weld filler metals formed from these so modified nickel aluminide alloys provide for crack-free welds in previously known nickel aluminide alloys.
Inventors:
 [1];  [2]
  1. (Knoxville, TN)
  2. (Lenior City, TN)
Issue Date:
OSTI Identifier:
869874
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
Patent Number(s):
US 5413876
Application Number:
07/970,757
Contract Number:
AC05-84OR21400
Research Org:
LOCKHEED MARTIN ENRGY SYST INC
Country of Publication:
United States
Language:
English
Subject:
nickel; aluminide; alloys; improved; weldability; weldable; essentially; free; entirely; weld; hot; cracking; provided; employing; zirconium; concentrations; wt; sufficient; provide; substantial; presence; ni-zr; eutectic; phase; prevent; filler; metals; formed; modified; crack-free; welds; previously; essentially free; weld filler; nickel aluminide; aluminide alloys; aluminide alloy; filler metal; hot cracking; improved weldability; filler metals; modified nickel; /428/148/228/420/