Microstructural changes of Zr-based metallic glass during micro-electrical discharge machining and grinding by a sintered diamond tool

Hu Huang, Jiwang Yan

研究成果: Article査読

17 被引用数 (Scopus)

抄録

Micro-electrical discharge machining (micro-EDM) and grinding of Zr-based metallic glass (MG) were performed by using sintered polycrystalline diamond (PCD) as a hybrid tool. The microstructural changes of the workpiece surface layer were investigated. X-ray diffraction (XRD) patterns indicated that the ZrC phase and a few other unknown crystalline phases existed in the surface layer after micro-EDM. After shallow grinding, other new crystalline phases were detected on the surfaces. After deep grinding, however, the crystalline phases disappeared and an amorphous surface was obtained, the XRD and micro-Raman characteristics of which were similar to those of the as-cast MG surface. These results suggested that crystallization of MG in micro-EDM was hierarchical along the depth direction with different mechanisms. The results of surface morphology showed that grinding after micro-EDM not only effectively removed the crystallization layers to obtain an amorphous MG surface, but also improved the surface quality. The hybrid process provides a promising method to create three-dimensional micro features on a MG surface.

本文言語English
ページ(範囲)14-21
ページ数8
ジャーナルJournal of Alloys and Compounds
688
DOI
出版ステータスPublished - 2016

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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