ELECTROMAGNETIC FORMING OF METALLIC GLASSES USING A CAPACITIVE DISCHARGE AND MAGNETIC FIELD

Title:

ELECTROMAGNETIC FORMING OF METALLIC GLASSES USING A CAPACITIVE DISCHARGE AND MAGNETIC FIELD

Document Type and Number:

WIPO Patent Application WO/2011/127414

Kind Code:

A3

Abstract:

An apparatus and method of uniformly heating, Theologically softening, and thermoplastically forming metallic glasses rapidly into a net shape using a rapid capacitor discharge forming (RCDF) tool in combination with an electromagnetic force generated by the interaction of the applied current with a transverse magnetic field. The RCDF method utilizes the discharge of electrical energy stored in a capacitor to uniformly and rapidly heat a sample or charge of metallic glass alloy to a predetermined "process temperature" between the glass transition temperature of the amorphous metal and the equilibrium melting point of the alloy in a time scale of several milliseconds or less, at which point the interaction between the electric field and the magnetic field generates a force capable of shaping the heated sample into a high quality amorphous bulk article via any number of techniques including, for example, injection molding, dynamic forging, stamp forging, and blow molding in a time scale of less than one second.

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Inventors:

JOHNSON WILLIAM L (US)
KALTENBOECK GEORG (US)
DEMETRIOU MARIOS D (US)
ROBERT SCOTT N (US)
SAMWER KONRAD (DE)

Application Number:

PCT/US2011/031804

Publication Date:

April 19, 2012

Filing Date:

April 08, 2011

Export Citation:

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Assignee:

CALIFORNIA INST OF TECHN (US)
JOHNSON WILLIAM L (US)
KALTENBOECK GEORG (US)
DEMETRIOU MARIOS D (US)
ROBERT SCOTT N (US)
SAMWER KONRAD (DE)

International Classes:

C22F1/00; B21D26/14; C21D1/38; C22C45/00; C22F3/02

Domestic Patent References:

WO2009117735A1

2009-09-24

Foreign References:

US3863700A	1975-02-04
JPS63220950A	1988-09-14
US20050034787A1	2005-02-17

Other References: