Akademik Veri Yönetim Sistemi
7th International Congress on Engineering, Architecture and Design, Ankara, Türkiye, 21 - 22 Mayıs 2021, ss.789-797
Fiber metal laminates (FML) as a type of composite materials are obtained from the production of low-thickness metal sheet and resin-impregnated fabrics in sandwich form. Before production,
mechanical or chemical surface pretreatments are traditionally applied to the metallic material surface
to improve the interlaminar strength between metal and prepreg in FML materials. As an alternative to
these surface pretreatment techniques, there are also some studies in which metal material surfaces are
pretreated with laser technique in recent years. Determining the appropriate laser parameters depending
on the material is very important to achieve high quality in the final product. In this study, it is aimed to
improve the interlaminar strength between metal and prepreg by performing surface pretreatments under
different laser parameters (such as laser scanning speed, power and frequency) on the surface of metal
materials before the production of FML materials. For this purpose, AA6061-T4 aluminum sheets were
treated with a pulsed fiber laser before the 2/1 configurated FML materials were produced with the hot
press technique. In order to determine the effect of laser parameters on the metal/prepreg interlaminar
strength of FML materials, three point bending tests were performed according to the ASTM D790-15
standard. The flexural strength and flexural modulus of FML samples were determined. The obtained
results showed that maximum load values obtained at laser frequency as 80 kHz, laser power as 30 and
50 W, and laser scanning speed as 800 and 1600 mm/s for L8 and L9 laser treatment parameters. Flexural
strength values increased to 375,99±8 MPa (L8) and 376,62±9 MPa (L9) according to untreated
(328,11±6 MPa) and sanded (334,84±3 MPa) FML samples. In addition, flexural modulus values also
increased from 57,8 GPa to 69,8 GPa by applying L9 laser process parameters.