Morphology of weld heat-affected zone liquation cracking in Ta-modified cast alloy 718
Journal Article
·
· Metallography (An International Journal); (USA)
- Ohio State Univ., Columbus, OH (USA). Dept. of Welding Engineering
- General Electric Co., Cincinnati, OH (USA). Aircraft Engine Business Group
The authors' discuss some problems involved in the use of alloy 718 which is a precipitation-hardenable, nickel-base superalloy developed in the early 1960s for medium temperature (540-705{sup 0}C) aerospace applications. The use of Nb as a substitute for Al and Ti leads to a susceptibility to liquation cracking in the weld heat-affected zone (HAZ). This problem is discussed in detail in the article.
- OSTI ID:
- 7171860
- Journal Information:
- Metallography (An International Journal); (USA), Journal Name: Metallography (An International Journal); (USA) Vol. 23:3; ISSN MEIJA; ISSN 0026-0800
- Country of Publication:
- United States
- Language:
- English
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·
OSTI ID:6137913
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OSTI ID:6522729
Related Subjects
36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
360104 -- Metals & Alloys-- Physical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
AEROSPACE INDUSTRY
ALLOYS
ALUMINIUM
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CORROSION RESISTANCE
CRACKING
CRYSTAL STRUCTURE
DECOMPOSITION
ELEMENTS
GRAIN BOUNDARIES
HARDENING
INDUSTRY
MATERIALS TESTING
METALS
MICROSTRUCTURE
MORPHOLOGY
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM
PRECIPITATION HARDENING
PYROLYSIS
TANTALUM ADDITIONS
TANTALUM ALLOYS
TEMPERATURE EFFECTS
TESTING
THERMOCHEMICAL PROCESSES
TITANIUM
TRANSITION ELEMENTS
360102* -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
360104 -- Metals & Alloys-- Physical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
AEROSPACE INDUSTRY
ALLOYS
ALUMINIUM
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CORROSION RESISTANCE
CRACKING
CRYSTAL STRUCTURE
DECOMPOSITION
ELEMENTS
GRAIN BOUNDARIES
HARDENING
INDUSTRY
MATERIALS TESTING
METALS
MICROSTRUCTURE
MORPHOLOGY
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM
PRECIPITATION HARDENING
PYROLYSIS
TANTALUM ADDITIONS
TANTALUM ALLOYS
TEMPERATURE EFFECTS
TESTING
THERMOCHEMICAL PROCESSES
TITANIUM
TRANSITION ELEMENTS