Microstructural characterization of a gas atomized Ti6Al4V-TiC composite

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90141-4· OSTI ID:7085219

Hu, D; Loretto, M H ^[1]

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1. Univ. of Birmingham, Edgbaston (United Kingdom)

Gas atomization is a well established process for producing rapidly solidified powders from superalloys, high alloy steels and aluminium alloys, and it has been applied to produce titanium alloy powders. Compared with other rapid solidification techniques, such as melt spinning and melt overflow, the cooling rate of gas atomization is low, being 10[sup 2]--10[sup 3] Ks[sup [minus]1], which might sacrifice some features of rapid solidification processing. However, its production capacity is substantial and it has an industrial potential. In early studies, titanium-based TiC particulate composites were prepared via powder or casting routes. In the composites fabricated via powder routes, the TiC reinforcement is equiaxed particles and their size is dependant upon the original TiC powder which is usually larger than 5 [mu]m. In cast composites TiC is dendritic. TiC dendrites are usually coarse, since the cooling rate is limited by the ingot size. Melt spinning was successfully used to produce very small TiC particles, less than 0.3 [mu]m, in the composites containing TiC up to 25 vol%. However, the industrial application of melt spinning for production of composites is unlikely, but a combination of gas atomization and powder metallurgy could be used. An investigation on the microstructural characteristics of the gas atomized Ti6Al4V-20vol%TiC composite powders and the HIPped bulk composite is presented in this paper.

• OSTI ID: 7085219
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 31:5; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ALLOYS
ALUMINIUM ALLOYS
ATOMIZATION
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
DATA
EXPERIMENTAL DATA
FABRICATION
HOT PRESSING
INFORMATION
MATERIALS
MATERIALS WORKING
MICROSTRUCTURE
NUMERICAL DATA
PRESSING
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VANADIUM ALLOYS