Weld metal hot-cracking of Hastelloy alloys C-22 and C-276: a study by analytical electron microscopy

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5741484

Cieslak, M J; Romig, A D; Headley, T J

Weld metal hot-cracking in multi-component alloy systems is often the result of the formation of small volume fractions of nonequilibrium constituents along solidification grain boundaries. These constituents arise as a result of the segregation phenomenon accompanying weld solidification and often serve to extend the solidification temperature range well below the equilibrium solidus. Purpose of this study was to identify and characterize (crystal structure and composition) by analytical electron microscopy (AEM) the phases associated with weld metal hot-cracking in Hastelloy alloys C-22 and C-276.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5741484
• Report Number(s): SAND-85-0098C; CONF-850840-2; ON: DE85009437
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
ELECTRON MICROSCOPY
FABRICATION
HASTELLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
JOINING
MATERIALS
MICROSCOPY
MOLYBDENUM ALLOYS
NICKEL ALLOYS
PHASE STUDIES
SEGREGATION
WELDING