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US 10,370,752 B2Granted
Imprinting bulk amorphous alloys at room temperature
AssigneeIowa State University Research Foundation, Inc.
InventorsMin Ha Lee, Eun Soo Park, Ryan Timothy Ott, Jürgen Eckert
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Abstract
A technique is disclosed for straining an amorphous alloy at ambient temperature to plastically and homogeneously deform the amorphous alloy, such that at least an exterior surface of the deformed amorphous alloy is substantially free of shear bands. An amorphous alloy may be strained at a rate of less than about 9×10−5 s−1 or by multiple passes of cold rolling. A pattern from a die may be imprinted into the amorphous alloy when strained, and the amorphous alloy may be used as a die to plastically strain other materials.
Claims10
A method comprising:
- straining an amorphous alloy at about 25° C. to plastically and homogeneously deform at least a portion of the amorphous alloy to form a deformed amorphous alloy, wherein at least an exterior surface of the deformed amorphous alloy is substantially free of shear bands,
- wherein the amorphous alloy is strained at a strain rate of less than about 9×10−5s−1,
- wherein the amorphous alloy is strained by applying a force to the amorphous alloy to achieve a stress corresponding to between about 50% and about 95% of the yield strength of the amorphous alloy, and
- wherein the amorphous alloy is strained with a patterned die to form one or more cavities in the amorphous alloy.
1 more element
Dependencies are inferred from the claim text.