Forming of bulk metallic glass microcomponents
Forming of bulk metallic glass microcomponents
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DOI：
10.1016/j.jmatprotec.2008.04.005
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发表时间：
2009-02
影响因子：
6.3
通讯作者：
J. Wert;C. Thomsen;R. D. Jensen;M. Arentoft
中科院分区：
文献类型：
--
作者：
J. Wert;C. Thomsen;R. D. Jensen;M. Arentoft
本文考虑采用正向挤压、闭式模锻和反向挤压工艺，用两种块体金属玻璃 (BMG) 成分（Mg60Cu30Y10 和 Zr44Cu40Ag8Al8）制造单个微型部件。目前的工作中使用了两种类型的模具：针对晶体金属冷成型操作的相对大型模具组和适合 BMG 特殊特性的轻型模具组。除了证明可以用 BMG 轻松制造多种几何形状的微组件外，还将流变特性与结晶动力学相结合，制定了一种普遍适用的方法，可以指导最佳成形参数的选择。最后，使用颗粒润滑剂进行 BMG 成型会导致单个润滑剂颗粒机械锁定到 BMG 表面。
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: Mg60Cu30Y10and 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.