Shaping metallic glasses by electromagnetic pulsing.

Abstract:

:With damage tolerance rivalling advanced engineering alloys and thermoplastic forming capabilities analogous to conventional plastics, metallic glasses are emerging as a modern engineering material. Here, we take advantage of their unique electrical and rheological properties along with the classic Lorentz force concept to demonstrate that electromagnetic coupling of electric current and a magnetic field can thermoplastically shape a metallic glass without conventional heating sources or applied mechanical forces. Specifically, we identify a process window where application of an electric current pulse in the presence of a normally directed magnetic field can ohmically heat a metallic glass to a softened state, while simultaneously inducing a large enough magnetic body force to plastically shape it. The heating and shaping is performed on millisecond timescales, effectively bypassing crystallization producing fully amorphous-shaped parts. This electromagnetic forming approach lays the groundwork for a versatile, time- and energy-efficient manufacturing platform for ultrastrong metals.

journal_name

Nat Commun

journal_title

Nature communications

authors

Kaltenboeck G,Demetriou MD,Roberts S,Johnson WL

doi

10.1038/ncomms10576

subject

Has Abstract

pub_date

2016-02-08 00:00:00

pages

10576

issn

2041-1723

pii

ncomms10576

journal_volume

7

pub_type

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