Evaluation of the Machinability of Nickel-Base, Inconel 718, Alloy with Nano-Ceramic Cutting Tools

2002 ◽  
Vol 45 (4) ◽  
pp. 506-511 ◽  
Author(s):  
E. O. Ezugwu ◽  
J. Bonney ◽  
K. A. Olajire
Keyword(s):  
Inconel 718 ◽  
Cutting Tools ◽  
Inconel 718 Alloy ◽  
Nickel Base

Influence of the Coated Carbide Grade on the Cutting Tool Life When Machining Inconel 718

2016 ◽  
Vol 674 ◽  
pp. 271-276
Author(s):  
Tomáš Bakša ◽  
Michal Morávek ◽  
Miroslav Zetek
Keyword(s):  
Tool Life ◽  
Inconel 718 ◽  
Cutting Tool ◽  
Cutting Tools ◽  
High Heat ◽  
Nuclear Industry ◽  
Inconel 718 Alloy ◽  
The Right ◽  
Coated Carbide ◽  
Milling Tools

This article deals with the machining of Inconel 718 alloy. In the research, several carbide milling tools with different carbide grades and coatings were used. The main aim is compare all cutting tools in terms of their cutting tool life during machining super alloy Inconel 718. This material is used for highly stressed components in the nuclear industry, such as combustion turbine. Due to its rapid hardening and high heat generation, it is very problematic to machining. The right choice of appropriate carbide grade is necessary to achieve high-quality cutting wedge, which is important for good adhesion of the coating. The results of this work will be used for further research and development of cutting tools for machining Inconel 718.

scholarly journals Measurement of Micro Burr and Slot Widths through Image Processing: Comparison of Manual and Automated Measurements in Micro-Milling

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4432
Author(s):  
Fatih Akkoyun ◽  
Ali Ercetin ◽  
Kubilay Aslantas ◽  
Danil Yurievich Pimenov ◽  
Khaled Giasin ◽  
...  
Keyword(s):  
Image Processing ◽  
Computer Vision ◽  
Inconel 718 ◽  
Cutting Tools ◽  
Helix Angle ◽  
Rake Angle ◽  
Accurate Solution ◽  
Micro Milling ◽  
Burr Formation ◽  
Inconel 718 Alloy

In this study, the burr and slot widths formed after the micro-milling process of Inconel 718 alloy were investigated using a rapid and accurate image processing method. The measurements were obtained using a user-defined subroutine for image processing. To determine the accuracy of the developed imaging process technique, the automated measurement results were compared against results measured using a manual measurement method. For the cutting experiments, Inconel 718 alloy was machined using several cutting tools with different geometry, such as the helix angle, axial rake angle, and number of cutting edges. The images of the burr and slots were captured using a scanning electron microscope (SEM). The captured images were processed with computer vision software, which was written in C++ programming language and open-sourced computer library (Open CV). According to the results, it was determined that there is a good correlation between automated and manual measurements of slot and burr widths. The accuracy of the proposed method is above 91%, 98%, and 99% for up milling, down milling, and slot measurements, respectively. The conducted study offers a user-friendly, fast, and accurate solution using computer vision (CV) technology by requiring only one SEM image as input to characterize slot and burr formation.

Nanoanalysis of precipitation in a modified Inconel 718 alloy

1994 ◽  
Vol 52 ◽  
pp. 702-703
Author(s):  
J. Liu ◽  
J. X. Dong ◽  
M. Z. Chen ◽  
X. S. Xie
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Inconel 718 ◽  
Analytical Electron Microscopy ◽  
Intermetallic Phases ◽  
Nickel Base Superalloy ◽  
Microstructural Stability ◽  
Inconel 718 Alloy ◽  
High Temperature Mechanical Properties ◽  
Nickel Base

The nickel-base superalloy Inconel 718 (IN718) is strengthened primarily by precipitation of two types of intermetallic phases in the austenite (γ) matrix: metastable γ' (cubic Ll2 structure) and γ" (tetragonal D022 structure) precipitates. Minor changes of the chemistry of the IN718 alloy can significantly affect its mechanical properties at high temperatures. It has been found that the microstructural stability of the precipitates and the high temperature performance of IN718 depend critically on the (Ti+Al)/Nb and Al/Ti ratios. The small sizes of these intermetallic phases and the fact that γ' precipitates are frequently associated with γ" precipitates in modified IN718 make it difficult to determine their composition. In this study, nanometer resolution analytical electron microscopy techniques have been used to characterize the structure, the morphology and the composition of the precipitated phases.The fabrication and the heat treatment of the modified IN718 alloy and its high temperature mechanical properties have been reported elsewhere.

The Nature of Delta Phase Precipitation in Inconel 718

1982 ◽  
Vol 40 ◽  
pp. 724-725
Author(s):  
L. S. Lin ◽  
C. C. Law
Keyword(s):  
Inconel 718 ◽  
Base Alloy ◽  
High Strength ◽  
Physical Metallurgy ◽  
Nickel Base Alloy ◽  
Phase Precipitation ◽  
Weight Percentage ◽  
Delta Phase ◽  
The Subject ◽  
Nickel Base

Inconel 718, a precipitation hardenable nickel-base alloy, is a versatile high strength, weldable wrought alloy that is used in the gas turbine industry for components operated at temperatures up to about 1300°F. The nominal chemical composition is 0.6A1-0.9Ti-19.OCr-18.0Fe-3Mo-5.2(Cb + Ta)- 0.1C with the balance Ni (in weight percentage). The physical metallurgy of IN 718 has been the subject of a number of investigations and it is now established that hardening is due, primarily, to the formation of metastable, disc-shaped γ" an ordered body-centered tetragonal structure (DO2 2 type superlattice).

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