Title Investigating the correlation between nano-impact fracture resistance and hardness/modulus ratio from nanoindentation at 25-500 °C and the fracture resistance and lifetime of cutting tools with Ti1-xAlxN (x = 0.5 and 0.67) PVD coatings in milling operations
Authors Beake B.D. , Smith J.F. , Gray A. , Fox-Rabinovich G.S. , Veldhuis S.C. , ENDRINO ARMENTEROS, JOSÉ LUIS
External publication Si
Means Surf. Coat. Technol.
Scope Article
Nature Científica
JCR Quartile 1
SJR Quartile 1
JCR Impact 1.67800
SJR Impact 1.15800
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-33845408267&doi=10.1016%2fj.surfcoat.2006.09.118&partnerID=40&md5=c56b8292ce9bbcf692881410cad72cf7
Publication date 01/01/2007
ISI 000243655900014
Scopus Id 2-s2.0-33845408267
DOI 10.1016/j.surfcoat.2006.09.118
Abstract A novel laboratory technique, nano-impact testing, has been used to test Ti1-xAlxN (x = 0.5 and 0.67) PVD coated WC-Co inserts at 25-500 °C. Cutting tool life was studied under conditions of face milling of the structural AISI 1040 steel; the end milling of hardened 4340 steel (HRC 40) and TiAl6V4 alloy. A correlation was found between the results of the rapid nano-impact test and milling tests. When x = 0.67 improved resistance to fracture was found during milling operations and also in the nano-impact test of this coating compared to when x = 0.50. The coating protects the cutting tool surface against the chipping that is typical for cutting operations with intensive adhesive interaction with workpiece materials such as machining of Ti-based alloys. The results give encouragement that the elevated temperature nano-impact test can be used to predict the wear and fracture resistance of hard coatings during milling operations. At 500 °C nanoindentation shows there is a lower H/Er ratio for the PVD coatings compared to room temperature, consistent with reduced fracture observed at this temperature in the nano-impact test. © 2006 Elsevier B.V. All rights reserved.
Keywords Cutting tools; Fracture toughness; Impact testing; Indentation; Milling (machining); Physical vapor deposition; Wear resistance; Hard coatings; Nano-impact testing; Protective coatings; Cutting tools;
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