Laser machining of different diameter holes in alumina ceramic: Thermal stress analysis


Yilbas B. S. , Akhtar S. S. , Karatas C.

MACHINING SCIENCE AND TECHNOLOGY, cilt.20, sa.3, ss.349-367, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 20 Konu: 3
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1080/10910344.2016.1191024
  • Dergi Adı: MACHINING SCIENCE AND TECHNOLOGY
  • Sayfa Sayıları: ss.349-367

Özet

Laser machining of different diameter holes into alumina tiles is carried out. Temperature and stress fields are predicted by using the finite element code. Surface temperature and residual stress predictions are validated through the thermocouple data and X-ray diffraction measurements. Morphological changes in the cutting section are examined by incorporating optical and scanning electron microscopes. It is found that the predictions of surface temperature and the residual stress formed at the cut section agree well with the experimental findings. In general, cut sections are free from large asperities; however, local dross attachments at the kerf edge and crack network formation at the kerf surface are observed.