Investigation of monolayer coated WC inserts on turning Ti-alloy

A single-layered AlCrN-based coating on the WC inserts was fabricated using the physical vapor deposition technique. Micro-hardness, coating thickness, surface morphology and elemental composition of coating on carbide insert were observed. The turning operations were conducted on Ti-6Al-4V alloy wi...

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Bibliographic Details
Published in:Materials and manufacturing processes 2020-05, Vol.35 (7), p.826-835
Main Authors: Lakshmanan, S., Pradeep Kumar, M., Dhananchezian, M., Yuvaraj, N.
Format: Article
Language:English
Subjects:
AlCrN
Coated
Cryogenic
Forces
Insert
Roughness
Ti-6Al-4V
Turning
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Summary:A single-layered AlCrN-based coating on the WC inserts was fabricated using the physical vapor deposition technique. Micro-hardness, coating thickness, surface morphology and elemental composition of coating on carbide insert were observed. The turning operations were conducted on Ti-6Al-4V alloy with coated carbide (AlCrN-cc) and without coated carbide (Ucc) inserts under the conventional and cryogenic coolant (LN 2 ) conditions. The 2D roughness value (R a ) and turning forces were measured for an experimental parameter, which comprised of various feed (f), depth of cut (d) and cutting speed (V c ). The tool edge morphology, elemental composition of worn carbide inserts was analyzed. The results showed the development of a lower surface roughness on a machined surface, reduction in cutting forces during machining by AlCrN coated inserts with a cryogenic coolant compared with a conventional coolant. In addition, the cut chips were analyzed and compared for the conventional and cryogenic coolant conditions.
ISSN:1042-6914
1532-2475
DOI:10.1080/10426914.2020.1711930