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CrAlSiN nanocomposite thin films for high-speed machining applications
International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, India.
International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, India.
National Institute of Technology, Warangal, India.
University West, Department of Engineering Science, Research Enviroment Production Technology West. International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, India. (PTW)ORCID iD: 0000-0001-5521-6894
2018 (English)In: Materials and Manufacturing Processes, ISSN 1042-6914, E-ISSN 1532-2475, Vol. 33, no 4, p. 371-377Article in journal (Refereed) Published
Abstract [en]

CrAlSiN nanocomposite thin films with varying film chemistry were developed on tungsten carbide (WC)specimens using cylindrical cathodic arc physical vapor deposition (c-CAPVD) technique. The physical, mechanical, and tribological properties of all the films were comprehensively investigated for arriving at the film chemistry leading to the best properties with respect to mechanical applications. The best tribo-mechanical properties were obtained in films with Cr/(AlþSi) ratio of 1.2. This coating with best properties was translated on to WC drill bits for machining tests. The Al and Si content has shown major influence on the adhesion strength and phase constitution of the films, with a considerable change in residual stress too. The superior properties achieved could be attributed to the formation of an ear-perfect nanocomposite structure, with the crystalline CrAlN phase surrounded by an amorphous Si3N4 phase. The tool life of the coated CrAlSiN tools was investigated during dry machining of EN 24material. In comparison to the tool life of an uncoated tool and a TiAlSiN-coated tool, the best CrAlSiN coatings synthesized in this study performed exceedingly well. The present study clearly demonstrates the advantages of CrAlSiN over other existing similar coatings for high-speed machining.

Place, publisher, year, edition, pages
2018. Vol. 33, no 4, p. 371-377
Keywords [en]
CAPVD, CrAlSiN, drilling, dry machining, mechanical properties, nanocomposit, thin films, tribology
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-13548DOI: 10.1080/10426914.2017.1303157OAI: oai:DiVA.org:hv-13548DiVA, id: diva2:1289362
Available from: 2019-02-18 Created: 2019-02-18 Last updated: 2019-06-12Bibliographically approved

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Joshi, Shrikant V.

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