TY - JOUR

T1 - Forming of bulk metallic glass microcomponents

A1 - Wert,John A.

A1 - Thomsen,Christian

A1 - Jensen,Rune Debel

A1 - Arentoft,Mogens

AU - Wert,John A.

AU - Thomsen,Christian

AU - Jensen,Rune Debel

AU - Arentoft,Mogens

PB - Elsevier S.A.

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

KW - Materials research

KW - Materialeforskning

U2 - 10.1016/j.jmatprotec.2008.04.005

DO - 10.1016/j.jmatprotec.2008.04.005

JO - Journal of Materials Processing Technology

JF - Journal of Materials Processing Technology

SN - 0924-0136

IS - 3

VL - 209

SP - 1570

EP - 1579

ER -