NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Weldability of high-toughness iron - 12 percent-nickel alloys with reactive metal additions of titanium, aluminum, or niobiumThree exceptionally high toughness Fe-12Ni alloys designed for cryogenic service were welded by using the gas tungsten arc welding process. Evaluation of their weldability included equivalent energy fracture toughness tests, transverse weld tensile tests at -196 and 25 C, and weld crack sensitivity tests. The Fe-12Ni-0.25Ti alloy proved extremely weldable for cryogenic applications, having weld and heat affected zone properties comparable to those of the wrought base alloy. The Fe-12Ni-0.5Al alloy had good weld properties only after the weld joint was heat treated. The Fe-12Ni-0.25Nb alloy was not considered weldable for cryogenic use because of its poor weld joint properties at -196 C and its susceptibility to hot cracking.
Document ID
19770011305
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Technical Note (TN)
Authors
Delvetian, J. H.
(Youngstown State Univ. Ohio, United States)
Stephens, J. R.
(NASA Lewis Research Center Cleveland, OH, United States)
Witzke, W. R.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
February 1, 1977
Subject Category
Metallic Materials
Report/Patent Number
NASA-TN-D-8403
E-8883
Accession Number
77N18249
Funding Number(s)
PROJECT: RTOP 505-16
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
No Preview Available