Fox-Rabinovich G.S. , Beake B.D. , ENDRINO ARMENTEROS, JOSÉ LUIS, Veldhuis S.C. , Parkinson R. , Shuster L.S. , Migranov M.S.
Si
Surf. Coat. Technol.
Article
Científica
1.559
1.282
01/01/2006
000237367600009
2-s2.0-33646482409
A comprehensive study of the mechanical properties of TiAlN and AlCrN coated cutting tools has been performed at room and elevated temperatures (up to 500 °C) using Micro Material's NanoTest Platform System. Micro-mechanical properties have been measured such as microhardness, elastic modulus, H/E ratio, microhardness dissipation parameter (MDP), critical load values (Lc1-first crack event; Lc2-load of dramatic coating failure) during scratch testing; a scratch crack propagation resistance parameter, CPRs = Lc1(Lc2 - Lc1) as well as nano-impact fracture resistance. Cutting tool life was studied under end milling conditions of the structural AISI 1040 steel. A correlation between CPRs was found with H/E ratio and MDP values. These parameters could be used to characterize the fracture toughness of the coatings. It was shown that mechanical characteristics such as H/E ratio, MDP and CPRs as well as nano-impact fracture resistance can be used to assess the resistance to adhesive-fatigue wear that is typical for end milling conditions. It was found that the microhardness of the coating and the H/E ratio reduces with rising temperature while the MDP value grows. The data obtained during quick laboratory nanohardness, nanoscratch as well as nano-impact fatigue testing can be used to rank the coatings studied and in some cases predict the relative life of a coated tool. © 2005 Elsevier B.V. All rights reserved.
Aluminum compounds; Coated materials; Crack propagation; Fracture toughness; Mechanical properties; Thermal effects; Titanium compounds; Wear resistance; Coated cutting tools; Cutting tool life; End milling conditions; Microhardness dissipation parameter (MDP); Scratch testing; Milling cutters; Aluminum compounds; Coated materials; Crack propagation; Fracture toughness; Mechanical properties; Milling cutters; Thermal effects; Titanium compounds; Wear resistance