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Sustainable and Environmentally Friendly Drilling of CFRP-Ti Stacks by DLC Coated Drills – A Tribomechanics Approach
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement. Department of Mechanical Engineering, CEMMPRE, University of Coimbra, Rua Luis Reis Santos, Coimbra, Portugal.ORCID-id: 0000-0003-0908-1065
2024 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Luleå: Luleå University of Technology, 2024.
Serie
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
HSV kategori
Forskningsprogram
Maskinelement
Identifikatorer
URN: urn:nbn:se:ltu:diva-105738ISBN: 978-91-8048-593-7 (tryckt)ISBN: 978-91-8048-594-4 (digital)OAI: oai:DiVA.org:ltu-105738DiVA, id: diva2:1864039
Disputas
2024-09-04, E632, Luleå University of Technology, Luleå, 10:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2024-06-03 Laget: 2024-06-03 Sist oppdatert: 2024-06-05bibliografisk kontrollert
Delarbeid
1. Surface Roughness Influence on Tribological Behavior of HiPIMS DLC Coatings
Åpne denne publikasjonen i ny fane eller vindu >>Surface Roughness Influence on Tribological Behavior of HiPIMS DLC Coatings
Vise andre…
2023 (engelsk)Inngår i: Tribology Transactions, ISSN 1040-2004, E-ISSN 1547-397X, Vol. 66, nr 3, s. 565-575Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The application of diamond-like carbon (DLC) coatings in dry machining of difficult-to-machine materials has been gaining popularity due to high inertness, low coefficient of friction (COF), and high hardness of these coatings. Although the effect of surface roughness on the tribological properties of DLC coatings is of paramount importance, usually it is overlooked and coatings performance analysis was accomplished generally on highly polished substrates. The generation of polished surfaces is a time-consuming, labor-intensive process and, in most cases, not feasible for the industry due to its high cost. This article focuses on determining the effect of substrate (cemented carbide, WC-Co) surface roughness on the load-bearing capacity and tribological properties of DLC coatings deposited by High Power Impulse Magnetron Sputtering (HiPIMS) in Ne–Ar gas plasma. The DLC films were deposited onto WC-Co substrates with three different surface roughness profiles and their tribological performance were evaluated using a reciprocating tribotest. The high surface roughness resulted in increased wear rate due to high levels of asperities and increased potential for premature delamination of the coatings, while also causing severe damage to the counterbody due to inhibition of transfer film formation.

sted, utgiver, år, opplag, sider
Taylor & Francis, 2023
Emneord
Coefficient of friction, DLC coating, HiPIMS, surface roughness, WC-Co substrate, wear
HSV kategori
Forskningsprogram
Maskinelement
Identifikatorer
urn:nbn:se:ltu:diva-97262 (URN)10.1080/10402004.2023.2197472 (DOI)000982395600001 ()2-s2.0-85158865287 (Scopus ID)
Forskningsfinansiär
EU, Horizon 2020, 860246
Merknad

Validerad;2023;Nivå 2;2023-05-22 (hanlid);

Funder: FCT–Fundação para a Ciência e a Tecnologia (UIDB/00285/2020, LA/P/0112/2020)

Tilgjengelig fra: 2023-05-22 Laget: 2023-05-22 Sist oppdatert: 2024-06-03bibliografisk kontrollert
2. A comparative study in the tribological behaviour of different DLC coatings sliding against titanium alloys
Åpne denne publikasjonen i ny fane eller vindu >>A comparative study in the tribological behaviour of different DLC coatings sliding against titanium alloys
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2024 (engelsk)Inngår i: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 554-555, artikkel-id 205468Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this study, the tribological behaviour of different Diamond-like-Carbon (DLC) coatings sliding against titanium alloy (Ti6Al4V) was analysed in a pin-on-disc tribometer at different applied loads to study effectiveness of tool coatings in titanium alloys machining. Three different DLC coatings were deposited on cemented carbide substrate using HiPIMS (DLC-Ar, DLC-Ne) and arc (DLC-Bn) deposition techniques. A detailed analysis of the wear track and titanium countersurfaces were performed following the tribotest to develop understanding about the wear mechanism and associated variation in the friction response. The results indicated that DLC-Ar presents low friction and reduced wear of coating and respective titanium countersurface at lowest load, seemingly due to its inherent tendency to spontaneously form graphitic transfer-layer at the interface. With an increase in the applied load, the tendency to retain tribofilm decreases as shearing ensue quickly exposing the underneath substrate material. The wear performance of DLC-Ne coatings is better than DLC-Ar under highest load and friction behaviour relatively close to DLC-Ar coatings. In comparison, under increased applied loads, DLC-Bn coatings offered better wear resistance and low friction compared with DLC-Ne and DLC-Ar coatings, which would offer improved performance in machining of titanium alloys.

sted, utgiver, år, opplag, sider
Elsevier, 2024
Emneord
Diamond like carbon, Coefficient of friction, Wear, cutting tools, Titanium alloys, HiPIMS
HSV kategori
Forskningsprogram
Maskinelement
Identifikatorer
urn:nbn:se:ltu:diva-105735 (URN)10.1016/j.wear.2024.205468 (DOI)2-s2.0-85197086252 (Scopus ID)
Forskningsfinansiär
EU, Horizon 2020, 860246
Merknad

Validerad;2024;Nivå 2;2024-07-08 (joosat);

Funder: Fundaçao para a Ciencia e a Tecnologia (UIDB/00285/2020 and LA/P/0112/2020);

Full text: CC BY-NC License;

This article has previously appeared as a manuscript in a thesis.

Tilgjengelig fra: 2024-06-02 Laget: 2024-06-02 Sist oppdatert: 2024-07-08bibliografisk kontrollert
3. Custom-tailored cross-cylinder tribotest to emulate wear mechanism in drilling of CFRP-Ti stacks
Åpne denne publikasjonen i ny fane eller vindu >>Custom-tailored cross-cylinder tribotest to emulate wear mechanism in drilling of CFRP-Ti stacks
2023 (engelsk)Inngår i: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 186, artikkel-id 108589Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

While drilling of CFRP-Ti stacks, tool experiences complex tribomechanical interaction due to dissimilar workpiece constituents. For emulating tool wear behavior, the typical tribotest configuration such as reciprocating and pin-on-disc test are not representative for imitating contact scenario underwent during the drilling operation. Cross-cylinder tribotest is an effective test configuration to emulate contact in different manufacturing processes by providing fresh contact surface during sliding. In this work, for the first-time, tool wear of WC-Co cylinders was analyzed in cross-cylinder configuration against multi-material stack arrangement. Moreover, cross-cylinder testing against multi-material [CFRP-Ti]n workpiece showed cyclic variation in coefficient of friction against different workpiece constituents and wear mechanism is a combination of adhesive and abrasive wear on WC-Co tool, comparable to actual drilling operation.

sted, utgiver, år, opplag, sider
Elsevier, 2023
Emneord
Cross-cylinder tribotest, CFRP-Ti stacks, Difficult-to-machine materials, Wear
HSV kategori
Forskningsprogram
Maskinelement
Identifikatorer
urn:nbn:se:ltu:diva-97629 (URN)10.1016/j.triboint.2023.108589 (DOI)001001426300001 ()2-s2.0-85159118215 (Scopus ID)
Forskningsfinansiär
EU, Horizon 2020, 860246
Merknad

Validerad;2023;Nivå 2;2023-05-29 (joosat);

Funder: FCT – Fundaçao para a Ciencia e a Tecnologia, (UIDB/00285/2020, LA/P/0112/2020)

Tilgjengelig fra: 2023-05-29 Laget: 2023-05-29 Sist oppdatert: 2024-06-03bibliografisk kontrollert
4. Emulating Wear Mechanism of DLC Coatings in Drilling of CFRP-Ti stacks by Using Cross-cylinder Tribotest
Åpne denne publikasjonen i ny fane eller vindu >>Emulating Wear Mechanism of DLC Coatings in Drilling of CFRP-Ti stacks by Using Cross-cylinder Tribotest
Vise andre…
(engelsk)Manuskript (preprint) (Annet vitenskapelig)
Emneord
Cross-cylinder tribotest, CFRP-Ti stacks, Drilling, DLC coatings, Wear mechanism, COF
HSV kategori
Identifikatorer
urn:nbn:se:ltu:diva-105736 (URN)
Tilgjengelig fra: 2024-06-02 Laget: 2024-06-02 Sist oppdatert: 2024-06-03
5. In-depth Tool Wear Analysis in Drilling of CFRP-Ti Stacks by DLC Coated Drills
Åpne denne publikasjonen i ny fane eller vindu >>In-depth Tool Wear Analysis in Drilling of CFRP-Ti Stacks by DLC Coated Drills
Vise andre…
(engelsk)Manuskript (preprint) (Annet vitenskapelig)
Emneord
CFRP-Ti stacks, Drilling, DLC coatings, Tool wear, HiPIMS, Arc deposition
HSV kategori
Identifikatorer
urn:nbn:se:ltu:diva-105737 (URN)
Tilgjengelig fra: 2024-06-02 Laget: 2024-06-02 Sist oppdatert: 2024-06-03

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