• Jasmaninder Singh Grewal
• Gurdeep Singh

This manuscript highlights characterisation and tribological behaviour of AlCrN-based multi-layered and mono-layered coatings deposited on EN-8 high-tensile steel with the help of Physical Vapour Deposition (PVD)-DC Magnetron Sputtering technique. These coatings were deposited to improve the wear-rate of EN-8 substrates. These AlCrN-based Nano-structured coatings were deposited on EN-8 substrates at 600oC temperature by using OerlikonBalzer’s-rapid coating system under the influence of nitrogen atmosphere. After deposition of coatings, the substrates were examined by investigating the thickness, micro-hardness, Porosity percentage &Surface roughness (Ra) values of coatings. Also, SEM/EDAX & XRD analysis were used to identify the various phases present on the substrates surface. The micro-hardness of multi-layered and mono-layered coatings was measured to be 470Hv and 362Hv, whereas thickness was measured to be6.1µm&4.0µm.Also, uncoated and coated EN-8 substrates were analysed for thermal behaviour with the help of Differential Scanning Calorimetry (DSC). This DSC analysis revealed that mono-layered coated substrates were thermally more stable as compare to multi-layered and uncoated substrates. After this, tribological behaviour of uncoated and coated substrates was examined according to ASTM-(G99-03) standard using a Pin-on-disc tribometer by varying sliding-velocity to 0.5 m.s-1, 1 m.s-1 and 2 m.s-1 at constant normal load of 30N.Wear results indicates that multi-layered AlCrN nano-structured coating behave better under different sliding-velocity conditions.

Physical Vapour Deposition, Sliding Wear, Sliding Speed, Frictional Coefficient, Alcrona-pro (AlCrN Mono-layered) & Altensa (AlCrN multi-layered) Coatings

"EXPERIMENTAL INVESTIGATION OF TRIBOLOGICAL PROPERTIES OF MONO-LAYERED AND MULTI-LAYERED AlCrN-BASED COATINGS ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.486-493, May 2019, Available :http://www.jetir.org/papers/JETIRCW06093.pdf

"EXPERIMENTAL INVESTIGATION OF TRIBOLOGICAL PROPERTIES OF MONO-LAYERED AND MULTI-LAYERED AlCrN-BASED COATINGS ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp486-493, May 2019, Available at : http://www.jetir.org/papers/JETIRCW06093.pdf