Development of matrix grain structure during the solidification of a Mg(AZ91)/SiC[sub p] composite

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90586-X· OSTI ID:7153052

Luo, A ^[1]

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1. Inst. of Magnesium Technology, Inc., Ste-Foy, Quebec (Canada)

It is well known that the matrix grain structure is one of the key factors influencing the mechanical and physical properties of cast metal matrix composites (MMCs). Direct transposition of rules developed for microstructural control in the solidification of unreinforced metals is not possible with MMCs, since the reinforcement frequently modifies solidification of the matrix. Only a limited and controversial understanding presently exists regarding the development of solidification structure (e.g. grain structure) of the composites, especially those with particulate reinforcement. In the present paper, the development of grain structure during the solidification of a Mg(AZ91)/SiC[sub p] composite is studied using computer-based thermal analysis, optical and scanning electron microscopy (SEM) techniques, and the possible mechanisms for grain refinement observed in the composite are discussed.

• OSTI ID: 7153052
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 31:9; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ALLOYS
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
DATA
EXPERIMENTAL DATA
GRAIN REFINEMENT
INFORMATION
MAGNESIUM ALLOYS
MAGNESIUM BASE ALLOYS
MATERIALS
MICROSTRUCTURE
NUMERICAL DATA
PHASE TRANSFORMATIONS
SILICON CARBIDES
SILICON COMPOUNDS
SOLIDIFICATION