Scratch adhesion and wear failure characteristics of PVD multilayer CrTi/CrTiN thin film ceramic coating deposited on AA7075-T6 aerospace alloy

Quazi, M. M.; Ishak, M.; Ahmed, Arslan; Bashir, M. Nasir; Alam, Imran

doi:10.1080/01694243.2017.1373988

Cited by 27 publications

(16 citation statements)

References 33 publications

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“…Nainaparampil et al [8] attributed this low friction coefficient to the plastic deformation of the wear debris when the TiN and CrN were combined into a single film of Ti-Cr-N. Similar results have been reported in the literature where it has been shown that the ternary nitride Ti-Cr-N coating provides the best wear properties [9]. In terms of mechanical properties, it has been observed that the Ti-Cr-N compound coating has higher hardness than that of TiN (21 GPa) and CrN (19 GPa) coatings [5].…”

Section: Introductionsupporting

confidence: 64%

Effect of Ar/N2 flow ratio on the microstructure and mechanical properties of Ti-Cr-N coatings deposited by DC magnetron sputtering on AISI D2 tool steels

Kehal¹,

Saoula²,

Abaidia³

et al. 2021

Surface and Coatings Technology

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Ti-Cr-N coatings were deposited on Si (100) and AISI D2 tool steel substrates by reactive DC magnetron cosputtering technique from titanium and chromium target in mixed Ar/N 2 atmosphere. The Ar/N 2 ratio effects on the chemical composition, structure, morphology, intrinsic stress and mechanical properties of the Ti-Cr-N coatings were investigated. The growing process of Ti-Cr-N coatings can be divided into three stages: Stage I, in poisoning mode (low flow ratio 1 < Ar/N 2 ≤ 1.4), Stage II, in transition mode (intermediate flow ratio 1.4 ≤ Ar/N 2 ≤ 3) and Stage III in metallic mode (Ar/N 2 > 3). For all samples, XRD analysis shown the formation of mixed nitrides phases. In stage I, Ti 2 N, TiN 0.3 , and hexagonal-Cr 2 N phases were observed. In Stage II, TiN 0.3 , Cr 2 N, and cubic-TiN phases were formed, while only TiN and Cr 2 N are observed in stage III. The coatings deposited with Ar/N₂ ratio of 3 shows the largest hardness of 24 GPa which is attribute to the dense structure and smoother surface morphology. The properties of the films are discussed in terms of evolution growth stages resulting by the variation of Ar/N 2 flow ratios.

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Section: Introductionsupporting

confidence: 64%

Effect of Ar/N2 flow ratio on the microstructure and mechanical properties of Ti-Cr-N coatings deposited by DC magnetron sputtering on AISI D2 tool steels

Kehal¹,

Saoula²,

Abaidia³

et al. 2021

Surface and Coatings Technology

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“…Furthermore, the usage of lasers is now being optimized [11,12] in different fields and applications such as in welding [13], and hard surfacing [14]. Hence, the usage of lasers has become a viable approach as an emerging rapid and robust technology.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Nanosecond Fibre Laser on the Removal of Paint on Metallic Surface

2021

Int. j. technol. eng. stud.

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This research aims to study the effect of nanosecond laser parameters on the paint removal process and obtain a set of parameters that would result in the highest paint removal efficiency. In this study, the effect of laser paint removal parameters such as power, defocus distance, and the number of loops are studied with an optical microscope to observe surface features. The laser paint removal process is conducted using the IPG YLM 200/30 -Q pulsed fiber laser machine. The process sample was examined with an optical microscope to analyze the effectiveness of this laser paint removal process. The results indicated that the power and number of loops significantly enhance the paint removal process. The selection of correct frequency, power, hatching distance, scanning speed, and defocus distance also play a significant part in the efficiency of the laser paint removal process.

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“…There are various surface modification techniques available including electrodeposition, 2 physical vapor deposition, 3 surface texturing 4 etc. Amongst available techniques, one technique to improve tribological properties of Al surfaces is to introduce laser controlled melting at the surface in the presence of a composition modifying and particulate embedding materials.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and tribological performance of a hybrid MMC coating deposited on Al–17Si piston alloy by laser composite surfacing technique

et al. 2018

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Laser composite surfacing (LCS) is a photon driven manufacturing technology that can be utilized for depositing hybrid metal matrix composite coatings (HMMC) on softer Ti/Al/Mg alloys to enhance their tribo-mechanical properties. LCS offers the advantages of higher directionality, localized microstructural refinement and higher metallurgical bonding between coating and substrate. The current research presents the tribo-mechanical evaluation and characterization of solid lubricant based Ni-WC coatings deposited by LCS on Al-Si piston alloy by varying the concentration of graphite between 5-to-15-weight percentage. The tribological behavior of LCS samples was investigated using a ball-on-plate tribometer.Results indicate that the surface hardness, wear rate and friction coefficient of the Al-Si hypereutectic piston alloy were improved after LCS of graphite based HMMC coatings. The maximum surface hardness of 781H v was acquired for the Ni-WC coating containing 5 wt% graphite. The friction coefficient of Al-Si under dry sliding conditions was reduced from 0.47 to 0.21. The reduction in the friction coefficient was attributed to the formation of a shearable transfer layer, which prevented delamination and reduced adhesion, abrasion and fatigue cracking.

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Scratch adhesion and wear failure characteristics of PVD multilayer CrTi/CrTiN thin film ceramic coating deposited on AA7075-T6 aerospace alloy

Cited by 27 publications

References 33 publications

Effect of Ar/N2 flow ratio on the microstructure and mechanical properties of Ti-Cr-N coatings deposited by DC magnetron sputtering on AISI D2 tool steels

Effect of Ar/N2 flow ratio on the microstructure and mechanical properties of Ti-Cr-N coatings deposited by DC magnetron sputtering on AISI D2 tool steels

The Influence of Nanosecond Fibre Laser on the Removal of Paint on Metallic Surface

Mechanical and tribological performance of a hybrid MMC coating deposited on Al–17Si piston alloy by laser composite surfacing technique

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