[논문]Surface Finish and Back-Wall Dross Behavior during the Fiber Laser Cutting of AZ31 Magnesium Alloy

Garcí; a-Ló; pez, Erika; Ibarra-Medina, Juansethi R.; Siller, Hector R.; Lammel-Lindemann, Jan A.; Rodriguez, Ciro A.

doi:10.3390/mi9100485

Surface Finish and Back-Wall Dross Behavior during the Fiber Laser Cutting of AZ31 Magnesium Alloy 원문보기

Micromachines, v.9 no.10, 2018년, pp.485 -

García-López, Erika (Escuela de Ingenieria y Ciencias, Tecnologico de Monterrey, Monterrey 64849, Mexico) , Ibarra-Medina, Juansethi R. (garcia.erika@itesm.mx (E.G.-L.)) , Siller, Hector R. (juansethi@itesm.mx (J.R.I.-M.)) , Lammel-Lindemann, Jan A. (drlammel@itesm.mx (J.A.L.-L.)) , Rodriguez, Ciro A. (Escuela de Ingenieria y Ciencias, Tecnologico de Monterrey, Monterrey 64849, Mexico)

Abstract ▼ AI-Helper

Magnesium alloys are of increasing interest in the medical industry due to their biodegradability properties and better mechanical properties as compared to biodegradable polymers. Fiber laser cutting of AZ31 magnesium alloy tubes was carried out to study the effect of cutting conditions on wall surface roughness and back-wall dross. During the experiments, an argon gas chamber was adapted in order to avoid material reactivity with oxygen and thus better control the part quality. A surface response methodology was applied to identify the significance of pulse overlapping and pulse energy. Our results indicate minimum values of surface roughness (Ra < 0.7 μm) when the spot overlapping is higher than 50%. A back-wall dross range of 0.24% to 0.94% was established. In addition, a reduction in back-wall dross accumulations was obtained after blowing away the dross particles from inside the tube using an argon gas jet, reaching values of 0.21%. Laser cutting experimental models show a quadratic model for back-wall dross related with the interaction of the pulse energy, and a linear model dependent on pulse overlapping factor for surface roughness.

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Surface Finish and Back-Wall Dross Behavior during the Fiber Laser Cutting of AZ31 Magnesium Alloy 원문보기

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