Hole quality improvement in CFRP/Ti6Al4V stacks using optimised flow rates for ▫$LCO_2$▫ and MQL sustainable cooling/lubrication

Rodriguez, Iñigo (avtor), Arrazola, P. J. (avtor), Cuesta, Mikel (avtor), Pušavec, Franci (avtor)

Carbon fibre reinforced polymer/titanium stacks (CFRP/Ti6Al4V) are employed in aeronautics due to their excellent weight-to-strength ratio and corrosion properties. However, these same material properties present challenges for hole making which cannot be solved using conventional water-based metalworking fluids (MWFs), as they cause degradation of the composite. Moreover, environmental and health concerns require exploration of alternative cooling/lubrication solutions. In this study, a controlled mixture of liquid carbon dioxide (▫$LCO_2$▫) and minimum quantity lubrication (MQL) was supplied through the drilling tool. The effect of varying ▫$LCO_2$▫ and MQL flow rates was evaluated on cutting forces, temperatures, and several hole quality outputs. The optimal flow rates were then determined through multi-objective optimisation. The results show that the cooling/lubrication flow rate greatly affects the measured outputs, and that supplying ▫$LCO_2$▫ + MQL with optimised flow rates helps achieve superior quality holes in CFRP, Ti6Al4V and CFRP/Ti6Al4V stacks.

• Jezik: Angleški jezik
• Ključne besede: CFRP/Ti stacks, cutting temperature, ▫$LCO_2$▫ assisted drilling, surface integrity, optimisation
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: 17 str.
• Številčenje: Vol. 329, art. 117687
• PID: 20.500.12556/RUL-155658
• UDK: 621.9
• ISSN pri članku: 1879-1085
• DOI: 10.1016/j.compstruct.2023.117687
• COBISS.SI-ID: 192029443
• Datum objave v RUL: 10.04.2024

Gradivo je del revije

• Naslov: Composite structures
• Skrajšan naslov: Compos. struct.
• Založnik: Elsevier
• ISSN: 1879-1085
• COBISS.SI-ID: 19024387

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: CFRP/Ti strukture, temperatura odrezavanja, vrtanje z asistenco ▫$LCO_2$▫, integriteta površine, optimizacija