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US 6,669,793 B2Granted
Microstructure controlled shear band pattern formation in ductile metal/bulk metallic glass matrix composites prepared by SLR processing
AssigneeCalifornia Institute of Technology
InventorCharles C. Hays
Life of this patent
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Abstract
A new metallic glass is formed by adding special additives to a metallic glass matrix; the additives having ductile properties to form as dendrites in the metallic glass. The additives distribute the shear lines in the metallic glass, allowing it to plastically deform more than previous materials.
Claims20
A method, comprising:
- forming a bulk metallic glass matrix using powder metallurgy;
- and
- controlling properties of said bulk metallic glass matrix to form multiple shear bands under mechanical loading or deformation, wherein said controlling comprises adding a ductile metal material to the bulk metallic glass matrix over a range of 5-50 percent per unit volume.
A method for forming a composite amorphous metal object comprising:
- heating a composite mixture comprising an amorphous metal alloy and a ductile metal phase to a super cooled liquid region temperature of the amorphous metal alloy;
- and
- forming said composite amorphous metal object using a powder metallurgy technique, wherein the ductile metal phase comprises in the range of from 5 to 50 volume percent of the composite.
A method comprising:
- forming a composite amorphous metal object by obtaining a powder of an amorphous metal alloy matrix material, mixing said powder with a second powder material, comprising an additional ductile phase, and using powder metallurgy techniques to form a composite material from mixed powders to form the composite amorphous metal object, wherein the ductile phase comprises in the range of from 5 to 50 volume percent of the composite.
Dependencies are inferred from the claim text.