Processing and Properties of Gamma+Laves Phase in-situ Composite Coatings Deposited via Magnetron Sputtering

2000 ◽  
Vol 646 ◽  
Author(s):  
Feng Huang ◽  
William S. Epling ◽  
John A. Barnard ◽  
Mark L. Weaver
Keyword(s):  
Titanium Aluminides ◽  
Composite Coatings ◽  
Cutting Tools ◽  
Laves Phase ◽  
Wear Resistant Coatings ◽  
Structural Applications ◽  
Alloy Target ◽  
Oxidation Resistant ◽  
Coatings For Cutting Tools

ABSTRACTRecent research efforts have established that Laves phase reinforced gamma titanium aluminides (i.e. γ + Laves) offer significant potential as oxidation resistant coating in high-temperature structural applications and as wear-resistant coatings for cutting tools. In this study, TiAlCr coatings were magnetron sputtered from a Ti-51Al-Cr alloy target onto various substrates. The microstructure, hardness, and stress behavior of the as-deposited and annealed coatings have been investigated.

The Influence of Machining Condition Forming Multilayer Coatings for Cutting Tools

2011 ◽  
Vol 496 ◽  
pp. 80-85 ◽  
Author(s):  
V.P. Tabakov
Keyword(s):  
Cutting Tools ◽  
Multilayer Coatings ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Machining Conditions ◽  
Study Results ◽  
Coatings For Cutting Tools

The study has shown a correlation between the machining conditions and peculiarities of damage occurring to wear-resistant coatings in the process of cutting. The study has made it possible to formulate requirements for wear-resistant coatings and the principle of forming multilayer coatings depending on machining conditions. The article presents study results illustrating the efficiency of cutting tools with multilayer coatings.

Composite multi-layer coatings for end mills

2021 ◽  
pp. 15-19
Author(s):  
M. Sh. Migranov ◽  
A.M. Migranov
Keyword(s):  
Thermal Loading ◽  
Cutting Tools ◽  
Experimental Studies ◽  
Multilayer Coatings ◽  
Wear Resistant Coatings ◽  
Milling Operations ◽  
The Coefficient Of Friction ◽  
End Mills ◽  
Cutting Zone ◽  
Coatings For Cutting Tools

The results of theoretical and experimental studies of tribological characteristics of composite multilayer coatings for cutting tools for blade processing by milling are presented. Installed reducing the coefficient of friction, longer tool life and reduced thermal loading of the cutting zone in milling operations with the use of wear-resistant coatings.

scholarly journals Nanostructured Multilayer Composite Coatings for Cutting Tools

2020 ◽  
Author(s):  
Sergey Grigoriev ◽  
Alexey Vereschaka ◽  
Marina Volosova ◽  
Caterina Sotova ◽  
Nikolay Sitnikov ◽  
...  
Keyword(s):  
Composite Coatings ◽  
Cutting Tools ◽  
Theoretical Background ◽  
Multilayer Composite ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Ceramic Tools ◽  
Operation Conditions ◽  
Resistant Layer ◽  
Nanostructured Multilayer Composite Coatings

The chapter deals with the specific features concerning the application of wear-resistant coatings to improve the performance properties of ceramic cutting tools. The paper discusses the theoretical background associated with the specific operation conditions and wear of ceramic cutting tools and influencing the choice of the compositions and structures of wear-resistant coatings. The studies were focused on the application of the Ti-(Ti,Al)N-(Zr,Nb,Ti,Al)N multilayer composite coating with a nanostructured wear-resistant layer, as well as the (Cr,Al,Si)N–(DLC–Si)–DLC–(DLC–Si) and (Cr,Al,Si)N–DLC composite coatings in order to improve the cutting properties of ceramic tools. The chapter presents the results of the comparative cutting tests for the tools with the coatings under study, uncoated tools, and tools with the Ti-(Ti,Al)N commercial coating. The wear mechanisms typical for ceramic cutting tools with coatings of various compositions have been investigated.

scholarly journals Nano-scale Multilayered Composite Coatings for Cutting Tools Operating under Heavy Cutting Conditions

Procedia CIRP ◽  
2014 ◽  
Vol 14 ◽  
pp. 239-244 ◽  
Author(s):  
A.A. Vereschaka ◽  
S.N. Grigoriev ◽  
A.S. Vereschaka ◽  
A.Yu. Popov ◽  
A.D. Batako
Keyword(s):  
Composite Coatings ◽  
Cutting Tools ◽  
Cutting Conditions ◽  
Nano Scale ◽  
Multilayered Composite ◽  
Coatings For Cutting Tools

Effect of Coherency Stresses on the Stability of Lamellar (α2+γ) Titanium Aluminides

1995 ◽  
Vol 404 ◽  
Author(s):  
F. Appel ◽  
U. Christoph ◽  
U. Lorenz ◽  
D R. Wagner
Keyword(s):  
Titanium Aluminides ◽  
Lamellar Microstructure ◽  
Structural Features ◽  
Strength Properties ◽  
Two Phase ◽  
Structural Applications ◽  
In Situ Heating ◽  
The Stability ◽  
Lamellar Interfaces

AbstractTwo phase titanium aluminides with a lamellar microstructure of the intermetallic phases α2(Ti3Al) and γ (TiAl) are being developed for high temperature structural applications. Due to differences in lattice parameters and crystal structure, coherency stresses and mismatch structures occur at various types of semicoherent interfaces present in the material. The implications of these structural features on the stability of lamellar microstructures were studied by TEM in situ heating experiments. The investigations revealed that the lamellar interfaces serve as sources for perfect and twinning dislocations. The results will be discussed with respect to the observed degradation of the strength properties of the two phase alloys in the intended service temperature range of 900- 1000 K.

scholarly journals HVOF Sprayed Fe-Based Wear-Resistant Coatings with Carbide Reinforcement, Synthesized In Situ and by Mechanically Activated Synthesis

Coatings ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1092
Author(s):  
Dmytro Tkachivskyi ◽  
Kristjan Juhani ◽  
Andrei Surženkov ◽  
Priit Kulu ◽  
Tomáš Tesař ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Composite Coatings ◽  
Thermal Spraying ◽  
Steel Matrix ◽  
X Ray Diffraction ◽  
Hvof Spraying ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Two Phases

The aims of this study were: (1) to produce composite coatings by high velocity oxy fuel (HVOF) spraying with steel matrix reinforced by cermets (a) Cr3C2–20%Ni and (b) TiC–20%NiMo, manufactured by mechanically activated synthesis (MAS); (2) to synthesize in situ a carbide reinforcement for iron matrix from a mixture of titanium and carbon during HVOF reactive thermal spraying (RTS); (3) to compare the wear resistance of produced coatings. As a reference, HVOF sprayed coatings from commercial Cr3C2–25%NiCr (Amperit 588.074) and AISI 316L were utilized. Study of microstructure revealed the inhomogeneity of the Cr-based MAS coating; the Ti-based MAS coating had typical carbide granular structure, and the Ti-based RTS coating possessed elongated structures of TiC. The X-ray diffraction revealed two main phases in the Cr-based MAS coating: Cr3C2 and austenite, and two phases in the Ti-based coatings: TiC and austenite. Among the studied coatings, the Cr-based MAS coating demonstrated the highest low-force hardness (490 HV0.3). During the abrasive rubber wheel test (ASTM G65), the Ti-based MAS coating showed the best wear resistance, followed by Cr3C2–25%NiCr and Ti-based RTS coating. In the abrasive–erosive test (GOST 23.201-78), the Ti-based MAS coating was 44% better than Cr3C2–25%NiCr coating. The Ti-based RTS coating was 11% more wear resistant than the reference Cr3C2–25%NiCr coating.

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