Metallography and growth crystallography of Al3Ti in Al-Ti alloys up to 5 wt% Ti

St. John D.H. and Hogan L.M. (1979) Metallography and growth crystallography of Al3Ti in Al-Ti alloys up to 5 wt% Ti. Journal of Crystal Growth, 46 3: 387-398. doi:10.1016/0022-0248(79)90087-3


Author St. John D.H.
Hogan L.M.
Title Metallography and growth crystallography of Al3Ti in Al-Ti alloys up to 5 wt% Ti
Journal name Journal of Crystal Growth   Check publisher's open access policy
ISSN 0022-0248
Publication date 1979
Sub-type Article (original research)
DOI 10.1016/0022-0248(79)90087-3
Volume 46
Issue 3
Start page 387
End page 398
Total pages 12
Subject 3104 Condensed Matter Physics
Abstract The morphologies of Al3Ti primary dendrites in Al-Ti alloys are studied for a range of compositions and growth conditions, and related to growth kinetics. The characteristics growth pattern is a flat dendrite with effectively inert (001) surfaces and orthogonal [110] branches. This faceted morphology is ascribed to growth rate anisotropy related to the large density difference between (001) and all other crystallographic planes. No evidence was found of the TPRE growth mechanism. A foliated growth pattern in which dendrites form parallel layers is described as antiskeletal growth. High freezing rates and low Ti contents promote fine twinned dendritic particles which are effective nuclei for the grain refinement of aluminium. At high Ti contents the growth anisotropy is reduced and 〈hk0〉 growth directions other than [110] become prominent.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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