Analysis of steady-state shallow cell solidification in metal matrix composites

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Acta Materialia

DOI:https://doi.org/10.1016/1359-6454(96)00081-X· OSTI ID:415440

Michaud, V J ^[1]; Mortensen, A ^[2]

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1. Ecole Centrale Paris, Chatenay-Malabry (France). Lab. de Mecanique des Sols, Structures et Materiaux
2. Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Materials Science and Engineering

The influence of capillarity on the near-plane front solidification of metal matrix composites is examined by analysis of the one-sided solidification of a binary alloy in a planar interstice of constant width in the limit of low Peclet number. The authors assume that in this limit, solute isoconcentrates in the liquid are everywhere orthogonal to the growth direction. Capillary causes the alloy to solidify in a cellular mode, even in the absence of constitutional supercooling. Two solution branches are derived for this solidification mode, one for shallow symmetric cells, the other for asymmetric cells. Restricting attention to the former solution branch, as the growth velocity increases, or the temperature gradient decreases, the cell amplitude increases gradually, to reach a critical point which depends strongly on the contact angle along the reinforcement/solidification front triple line.

• OSTI ID: 415440
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 11 Vol. 44; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BINARY ALLOY SYSTEMS
CAPILLARY FLOW
COMPOSITE MATERIALS
FABRICATION
INCLUSIONS
INTERFACES
MICROSTRUCTURE
MORPHOLOGY
NUMERICAL ANALYSIS
SOLIDIFICATION
SOLUTES
TEMPERATURE GRADIENTS
VELOCITY