Nickel aluminide alloys with improved weldability

Patent · Tue May 09 00:00:00 EDT 1995

OSTI ID:869874

Santella, Michael L ^[1]; Goodwin, Gene M ^[2]

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1. Knoxville, TN
2. Lenior City, TN

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: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• 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

Related Subjects

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/