Investigation of Directional Dependence of Heat Affected Zone Limits on Laser Pulse Energy

Canel T. , Bağlan İ.

2nd INTERNATIONAL CONFERENCE ON LIFE AND ENGINEERING SCIEN, İstanbul, Turkey, 27 - 29 June 2019, vol.1, no.1, pp.285-291

  • Publication Type: Conference Paper / Full Text
  • Volume: 1
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.285-291


Composites contain at least two materials which have different properties. Despite the new

material has superior property, machining of composite has many difficulties due to the nonhomogeneous

structure of composites. For this reason in addition to turning, drilling and milling,

laser ablation is the more preferred in machining of composite materials. When directed fiber

reinforced composites are laser-machined, it is impossible to obtain a circular cavity. Almost

circularity can be achieved for low laser energies while increasing the energy increases the

circularity distortion. This is because the fibers conduct heat much more than the polymer matrix.

In this study, 0.1 J, 1 J, 2 J, 3 J and 4J energies of pulses were sent to the composite material. The

Heat Affected Zone around the cavity formed on the composite material was measured.

Measurements were made with optical microscope images of the cavity. As a result of the

measurements, it was observed that the heat conduction through the fibers was 1.7 times higher

than the perpendicular to the fibers.