TiAlN/VN superlattice structured PVD coatings: A new alternative in machining of aluminium alloys for aerospace and automotive components

Hovsepian, P.Eh.; Luo, Quanshun; Robinson, G.; Pittman, M.; Howarth, Martin; Doerwald, D.; Tietema, R.; Sim, W.M.; Deeming, A.; Zeus, T.

doi:10.1016/j.surfcoat.2005.11.106

Cited by 117 publications

(59 citation statements)

References 20 publications

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“…Secondly, the existence of a tribofilm reduces the severity of stress concentration by redistributes the sliding contact stresses. Thirdly, the TiAlN/VN multilayer itself possess superhardness in a range of 30-50 GPa as compared to its constituting nitrides TiAlN and VN in which the hardness values are usually less than 20 GPa [13,14,18,21]. High hardness in the superlattice multilayer nitrides provides further resistance against worn surface deformation and delamination wear [27,28].…”

Section: Discussionmentioning

confidence: 99%

“…Its outstanding tribological properties, as compared to other hard nitrides in the TiN and TiAlN family, are the combined low dry sliding friction coefficient (= 0.4-0.6) and extremely low wear rate in a scale of 10 -17 m 3 N -1 m -1 [15,16]. This has led to successful applications in cutting tools in dry milling wrought and cast aluminium alloys [17,18].…”

Section: Introductionmentioning

confidence: 99%

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TEM-EELS study of low-friction superlattice TiAlN/VN coating: the wear mechanisms

et al. 2006

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A 20-50 nm thick tribofilm was generated on the worn surface of a multilayer coating TiAlN/VN after dry sliding test against an alumina counterpart. The tribofilm was characterized by applying analytical transmission electron microscopy techniques with emphasis on detailed electron energy loss spectrometry and energy loss near edge structure analysis. Pronounced oxygen in the tribofilm indicated a predominant tribo-oxidation wear. Structural changes in the inner-shell ionization edges of N, Ti and V suggested decomposition of nitride fragments.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

TEM-EELS study of low-friction superlattice TiAlN/VN coating: the wear mechanisms

et al. 2006

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“…The films have been formed as a result of (1) the surface modification of the cutting tool material [17,44,45]; and (2) due to the transfer from the workpiece with further tribo-oxidation [1,46].…”

Section: Experimental Examples Of Tribofilm Formationmentioning

confidence: 99%

Tribofilm Formation As a Result of Complex Interaction at the Tool/Chip Interface during Cutting

Fox-Rabinovich

Гершман²,

Hakim

et al. 2014

Lubricants

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Tribofilms are dynamic structures that form at the interface during frictional sliding. These films play a significant role in friction control, particularly under heavy loaded/high temperature conditions, such as those found at the cutting tool/chip interface. The thermodynamic aspects of tribofilm formation are discussed here. Thermodynamic analysis of entropy production during friction shows that there are two types of tribofilms that affect the wear behavior of a cutting tool: (1) tribofilms forming as a result of the surface modification of the cutting tools with further tribo-oxidation; and (2) tribofilms that form as a result of material transfer from the contacting frictional body (the workpiece) during the tool/chip interaction. Experimental examples are presented, outlining the beneficial role of both types of tribofilms.

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“…Concerning the tribological properties, however, previous experiments were mainly concentrated on the friction and wear properties in room temperature (RT) ambient conditions. For example, the coatings exhibited low friction coefficient at µ = 0.4 -0.6 and extremely low wear coefficient in a scale of 10 -17 ~ 10 -16 m 3 N -1 m -1 in ball-on-disk sliding tests against an alumina ball, which are significantly better than TiN and other TiAlN based coatings [1][2][3][4][7][8]. In the associated wear mechanism studies, Raman spectroscopy of the wear debris detected V 2 O 5 -type structure [8].…”

Section: Introductionmentioning

confidence: 95%

“…TiAlN/VN is a multicomponent nitride coating grown by combined cathodic arc etching and reactive magnetron sputter deposition [1]. TiAlN/VN coated cutting tools have shown excellent wear resistance in machining sticky metals such as aluminium alloys and austenite stainless steel [2][3]. Up to date, comprehensive experimental research has been conducted to study the deposition, structure, mechanical properties, thermal resistance, oxidation kinetics, and tribological properties of the 2 TiAlN/VN coating [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Temperature dependent friction and wear of magnetron sputtered coating TiAlN/VN

Luo

2011

Wear

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In this paper, a magnetron sputtered nano-structured multilayer coating TiAlN/VN, grown on hardened tool steel substrate, has been investigated in un-lubricated ball-on-disk sliding tests against an alumina counterface, to study the friction and wear behaviours at a broad range of testing temperatures from 25 to 700 0 C, followed by comprehensive analysis of the worn samples . The associated wear mechanism changed to severe wear dominated by cracking and spalling. From 500 0 C and so on, accelerated oxidation of the TiAlN/VN became the controlling process. This led first to the massive generation of oxide debris and maximum friction of µ = 1.1 at 500 0 C, and then to fast deterioration of the coating despite the lowest friction coefficient of µ < 0.3 at 700 0 C.

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TiAlN/VN superlattice structured PVD coatings: A new alternative in machining of aluminium alloys for aerospace and automotive components

Cited by 117 publications

References 20 publications

TEM-EELS study of low-friction superlattice TiAlN/VN coating: the wear mechanisms

TEM-EELS study of low-friction superlattice TiAlN/VN coating: the wear mechanisms

Tribofilm Formation As a Result of Complex Interaction at the Tool/Chip Interface during Cutting

Temperature dependent friction and wear of magnetron sputtered coating TiAlN/VN

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