Effect of tool shape on the machined surface integrity of polycrystalline ZnSe

Weihai Huang, Jiwang Yan

研究成果: Conference contribution

抄録

Polycrystalline zinc selenide (p-ZnSe) is one of the most widely used infrared optical materials. Since p-ZnSe possesses soft and brittle properties, it is machined at micro/nanoscale for achieving ductile mode machining. In micro/nanoscale machining, the tool shape and edge sharpness have significant influence on tool-workpiece contact and mechanism of chip formation, and consequently affect the machined surface integrity. To reveal the effect of tool shape on the machined surface integrity of p-ZnSe, in this study, round-nose and spherical diamond tools, which have different tool geometries and edge radii, were used for machining p-ZnSe. Results present that the tool nose radius and edge radius are critical factors for the chip formation and phase transformation of the workpiece material. Increasing the edge radius or using spherical tool causes a burnishing effect without material removal. Local plastic deformation is caused by an intense compressive stress under a high effective negative rake angle. In addition, results show that no matter what kind of tool is used and how the material is deformed, grain boundary has a great influence on the machined surface integrity. This study provides an insight into the deformation mechanism of polycrystalline brittle material in nanoscale machining with respect to different tool shapes, which will guide improvement of machined surface integrity.

本文言語English
ホスト出版物のタイトルProceedings of the 21st International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2021
編集者R. K. Leach, C. Nisbet, D. Phillips
出版社euspen
ページ387-390
ページ数4
ISBN(電子版)9780995775190
出版ステータスPublished - 2021
イベント21st International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2021 - Virtual, Online
継続期間: 2021 6月 72021 6月 10

出版物シリーズ

名前Proceedings of the 21st International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2021

Conference

Conference21st International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2021
CityVirtual, Online
Period21/6/721/6/10

ASJC Scopus subject areas

  • 産業および生産工学
  • 機械工学
  • 環境工学
  • 材料科学(全般)
  • 器械工学

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