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Nickel aluminide alloys with improved weldability

Patent ·
OSTI ID:869874
 [1];  [2]
  1. Knoxville, TN
  2. Lenior City, TN
+ Show Author Affiliations

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.

Research Organization:
LOCKHEED MARTIN ENRGY SYST INC
DOE Contract Number:
AC05-84OR21400
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
Patent Number(s):
US 5413876
Application Number:
07/970,757
OSTI ID:
869874
Country of Publication:
United States
Language:
English

References (1)

Nickel Aluminides for Structural Use journal May 1986

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Related Subjects

/428/148/228/420/
alloys
aluminide
aluminide alloy
aluminide alloys
concentrations
crack-free
cracking
employing
entirely
essentially
essentially free
eutectic
filler
filler metal
filler metals
formed
free
hot
hot cracking
improved
improved weldability
metals
modified
modified nickel
ni--zr
nickel
nickel aluminide
phase
presence
prevent
previously
provide
provided
substantial
sufficient
weld
weld filler
weldability
weldable
welds
wt
zirconium