Weldability of high toughness Fe--12% Ni alloys containing Ti, Al, or Nb

Conference · Fri Apr 01 04:00:00 EST 1977 · Weld. J. (Miami); (United States)

OSTI ID:7220218

Devletian, J H ^[1]; Stephens, J R; Witzke, W R

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1. Youngstown State Univ., OH

Three exceptionally high-toughness Fe-12% Ni alloys designed for cryogenic service were welded using the GTA welding process. Evaluation of weldability included equivalent energy K/sub Icd/ fracture toughness tests, transverse-weld tensile tests at -196 and 25 C (-321 and 77 F) and weld crack sensitivity tests. The Fe-12% Ni-0.25% Ti alloy proved extremely weldable for cryogenic applications, having weld and heat-affected zone properties comparable with those of the wrought base alloy. The Fe-12% Ni-0.5% Al had good weld properties only after the weld joint was heat treated. The Fe-12% Ni-0.25% Nb alloy was not considered weldable for cryogenic use because of its poor weld joint properties at -196 C and its susceptibility to hot cracking.

• OSTI ID: 7220218
• Conference Information: Journal Name: Weld. J. (Miami); (United States) Journal Volume: 56:4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
CRYOGENICS
CRYSTAL STRUCTURE
FRACTURE PROPERTIES
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
NIOBIUM ADDITIONS
NIOBIUM ALLOYS
TITANIUM ADDITIONS
TITANIUM ALLOYS
WELDABILITY