Forming of bulk metallic glass microcomponents

John A. Wert, Christian Thomsen, Rune Debel Jensen, Mogens Arentoft

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The present article considers forward extrusion, closed-die forging and backward extrusion processes for fabrication of individual microcomponents from two bulk metallic glass (BMG) compositions: Mg60Cu30Y10 and Zr44Cu40Ag8Al8. Two types of tooling were used in the present work: relatively massive die sets characteristic of cold forming operations for crystalline metals and lightweight die sets adapted to the special characteristics of BMGs. In addition to demonstrating that microcomponents of several geometries can be readily fabricated from BMGs, rheological properties are combined with crystallization kinetics to formulate a generally applicable method that can guide selection of optimal forming parameters. Finally, the use of particulate-based lubricants for BMG forming is shown to result in individual lubricant particles becoming mechanically locked into the BMG surface. (C) 2008 Elsevier B.V. All rights reserved.
    Original languageEnglish
    JournalJournal of Materials Processing Technology
    Volume209
    Issue number3
    Pages (from-to)1570-1579
    ISSN0924-0136
    DOIs
    Publication statusPublished - 2009

    Keywords

    • Materials research

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