Invention Grant
- Patent Title: Sheet forming of metallic glass by rapid capacitor discharge
- Patent Title (中): 通过快速电容放电来成形金属玻璃
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Application No.: US14054545Application Date: 2013-10-15
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Publication No.: US08961716B2Publication Date: 2015-02-24
- Inventor: William L. Johnson , Marios D. Demetriou , Joseph P. Schramm
- Applicant: California Institute of Technology
- Applicant Address: US CA Pasadena
- Assignee: California Institute of Technology
- Current Assignee: California Institute of Technology
- Current Assignee Address: US CA Pasadena
- Agency: Polsinelli PC
- Main IPC: C22F1/10
- IPC: C22F1/10 ; B21C29/00 ; B21C37/02 ; B21J1/00 ; C21D1/34 ; C21D1/38 ; C21D1/40 ; C21D7/13 ; C22C1/00 ; C22C45/00 ; C22F1/00 ; B21B15/00 ; B23K15/00

Abstract:
An apparatus and method of uniformly heating, rheologically softening, and thermoplastically forming metallic glasses rapidly into a net shape using a rapid capacitor discharge forming (RCDF) tool are provided. 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 material and the equilibrium melting point of the alloy in a time scale of several milliseconds or less. Once the sample is uniformly heated such that the entire sample block has a sufficiently low process viscosity it may be shaped into high quality amorphous bulk articles via any number of techniques including, for example, injection molding, dynamic forging, stamp forging, sheet forming, and blow molding in a time frame of less than 1 second.
Public/Granted literature
- US20140047888A1 SHEET FORMING OF METALLIC GLASS BY RAPID CAPACITOR DISCHARGE Public/Granted day:2014-02-20
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