γ′ formation in superalloy U720LI

gamma ' phase in alloy U720LI can nucleate and grow into various morphologies depending on thermal processing conditions. The size of precipitated gamma ' in U720LI is controlled largely by solution heat treatment cooling rate. gamma ' precipitation in alloy U720LI can be defined in t...

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Bibliographic Details
Published inScripta materialia Vol. 40; no. 11; pp. 1215 - 1220
Main Authors Furrer, David Ulrich, Fecht, Hans-Jorg
Format Journal Article
LanguageEnglish
Published New York, NY Elsevier Ltd 07.05.1999
Elsevier Science
Subjects
Applied sciences
Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Materials science
Metals. Metallurgy
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Nickel base alloys
TTT curve
Phase transformations
Metallography
Prime gamma phase
Experimental study
Superalloys
Heat treatments
Multi-element alloys
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Summary:gamma ' phase in alloy U720LI can nucleate and grow into various morphologies depending on thermal processing conditions. The size of precipitated gamma ' in U720LI is controlled largely by solution heat treatment cooling rate. gamma ' precipitation in alloy U720LI can be defined in terms of continuous cooling transformation kinetics. Grain boundary gamma ' formation controls the grain boundary morphology in alloy U720LI from fine serrations, to coarse serrations, to large amplitude, jig-saw puzzle type morphologies.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1359-6462
1872-8456
DOI:10.1016/S1359-6462(99)00094-9