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Systems and methods for fabricating objects from bulk metallic glass matrix composites using primary crystallization

a technology of metallic glass matrix and composites, applied in the field of fabricating objects from bulk metallic glass matrix composites, can solve the problems of limited viability of engineering materials, limited manufacturing of metallic glasses, and initial limitations of metallic glasses

Inactive Publication Date: 2014-08-14
CALIFORNIA INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

The invention relates to systems and methods for fabricating objects using bulk metallic glass matrix composites. The method involves forming a composition into the desired shape and developing it to include non-equilibrium inclusions that are softer than the surrounding matrix. The non-equilibrium inclusions can be developed by subjecting the composition to an appropriate cooling rate or by heat treatment. The non-equilibrium inclusions can be B2 phase inclusions or spherical inclusions. The resulting object has improved materials properties. The invention also includes a method for making a golf head casing with non-equilibrium inclusions on the striking surface.

Problems solved by technology

Nonetheless, the manufacture of metallic glasses presents challenges that limit their viability as engineering materials.
Indeed, because of this limitation in thickness, metallic glasses were initially limited to applications that involved coatings.

Method used

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  • Systems and methods for fabricating objects from bulk metallic glass matrix composites using primary crystallization
  • Systems and methods for fabricating objects from bulk metallic glass matrix composites using primary crystallization
  • Systems and methods for fabricating objects from bulk metallic glass matrix composites using primary crystallization

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Embodiment Construction

[0038]Turning now to the drawings, systems and methods for implementing bulk metallic glass matrix composites in the fabrication of objects are illustrated. In many embodiments, a bulk metallic glass matrix composite composition is formed into the shape of an object to be fabricated, and the composition is developed to include non-equilibrium inclusions that are softer than the surrounding matrix (e.g. as measured by shear modulus, elastic limit, or hardness). In a number of embodiments, the formed composition is heat treated to develop the inclusions. In several embodiments, the heat treating is localized to regions where it is desired that the object be especially robust.

[0039]Although bulk metallic glasses can possess a number of advantageous materials properties that might make them suitable materials from which to fabricate some structural components from, they might not have the requisite resistance to brittle fracture and / or ductility that can allow them to implemented in man...

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Abstract

Systems and methods in accordance with embodiments of the invention implement bulk metallic glass matrix composites in the fabrication of objects. In one embodiment, a method of fabricating an object including a bulk metallic glass matrix composite includes: forming a bulk metallic glass matrix composite composition into the shape of the object to be fabricated; and developing the bulk metallic glass matrix composite composition to include non-equilibrium inclusions that are softer than the surrounding matrix as measured by one of: the shear modulus, the elastic limit, and the hardness; where the bulk metallic glass matrix composite composition is such that the extent of the presence of the inclusions can be made to vary.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The current application claims priority to U.S. Provisional Application No. 61 / 763,292, filed Feb. 11, 2013, the disclosure of which is incorporated herein by reference.STATEMENT OF FEDERAL FUNDING[0002]The invention described herein was made in the performance of work under a NASA contract, and is subject to the provisions of Public Law 96-517 (35 U.S.C. 202) in which the Contractor has elected to retain title.FIELD OF THE INVENTION[0003]The present invention generally relates to fabricating objects from bulk metallic glass matrix composites.BACKGROUND[0004]Metallic glasses, also known as amorphous alloys, embody a relatively new class of materials that is receiving much interest from the engineering and design communities. Metallic glasses are characterized by their disordered atomic-scale structure in spite of their metallic constituent elements—i.e. whereas conventional metallic materials typically possess a highly ordered atomic stru...

Claims

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Application Information

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IPC IPC(8): B22D25/06B22F3/02C22C45/00B22D17/20
CPCB22D25/06C22C45/00B22F3/02B22D17/20B22F3/087B22F3/225B22D17/00C22C45/10A63B53/04A63B2209/00C22C1/11
Inventor HOFMANN, DOUGLAS C.
Owner CALIFORNIA INST OF TECH
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