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ECCI and EBSD study of subsurface damages in high speed turning of inconel 718 under different tools and machining parameters

Chen, Zhe LU ; Lin Peng, Ru ; Zhou, Jinming LU ; Moverare, Johan ; Bushlya, Volodymyr LU and Johansson, Sten (2013) 13th International Conference on Fracture 2013, ICF 2013 6. p.4697-4704
Abstract

Inconel 718 is a Ni-based superalloy that can perform excellently at elevated temperatures. However, surface and subsurface damages in the form of microstructural and property changes and tensile residual stresses are common in a machined Inconel 718 component because of its poor machinability. Such damages have a significant influence on performance and the life time of the part. To characterise microstructural damages and understand how they are correlated to machining conditions are not only important for the evaluation of surface integrity but also for the optimization of machining operations to minimise effects from the machining process. This paper uses the ECCI (electron channelling contrast imaging) and EBSD (electron back... (More)

Inconel 718 is a Ni-based superalloy that can perform excellently at elevated temperatures. However, surface and subsurface damages in the form of microstructural and property changes and tensile residual stresses are common in a machined Inconel 718 component because of its poor machinability. Such damages have a significant influence on performance and the life time of the part. To characterise microstructural damages and understand how they are correlated to machining conditions are not only important for the evaluation of surface integrity but also for the optimization of machining operations to minimise effects from the machining process. This paper uses the ECCI (electron channelling contrast imaging) and EBSD (electron back scatter diffraction) methods to study the effect of cutting tools and cutting speeds on subsurface plastic deformation of machined Inconel 718. When turning at 200 m/min, a comparable level of plastic deformation was found under the surface machined with uncoated cubic boron nitride (CBN), titanium nitride coated CBN and whisker reinforced alumina (WRA). With an increase in cutting speed, the plastic deformation depth increased, and uncoated CBN tools showed superior performance in term of subsurface microstructure alterations compared to the other tool materials.

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Abstract (Swedish)
Inconel 718 is a Ni-based superalloy that can perform excellently at elevated temperatures. However, surface and subsurface damages in the form of microstructural and property changes and tensile residual stresses are common in a machined Inconel 718 component because of its poor machinability. Such damages have a significant influence on performance and the life time of the part. To characterise microstructural damages and understand how they are correlated to machining conditions are not only important for the evaluation of surface integrity but also for the optimization of machining operations to minimise effects from the machining process. This paper uses the ECCI (electron channelling contrast imaging) and EBSD (electron back scatter... (More)
Inconel 718 is a Ni-based superalloy that can perform excellently at elevated temperatures. However, surface and subsurface damages in the form of microstructural and property changes and tensile residual stresses are common in a machined Inconel 718 component because of its poor machinability. Such damages have a significant influence on performance and the life time of the part. To characterise microstructural damages and understand how they are correlated to machining conditions are not only important for the evaluation of surface integrity but also for the optimization of machining operations to minimise effects from the machining process. This paper uses the ECCI (electron channelling contrast imaging) and EBSD (electron back scatter diffraction) methods to study the effect of cutting tools and cutting speeds on subsurface plastic deformation of machined Inconel 718. When turning at 200 m/min, a comparable level of plastic deformation was found under the surface machined with uncoated cubic boron nitride (CBN), titanium nitride coated CBN and whisker reinforced alumina (WRA). With an increase in cutting speed, the plastic deformation depth increased, and uncoated CBN tools showed superior performance in term of subsurface microstructure alterations compared to the other tool materials. Copyright © (2013) by International Conference on Fracture. (Less)
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author
; ; ; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
EBSD, High speed turning, Inconel 718, Plastic deformation, Surface integrity, EBSD, High speed turning, Inconel 718, Plastic deformation, Surface Integrity, Alumnia, Cutting, Fracture, Machining Centers, Surfaces, Tools
host publication
13th International Conference on Fracture 2013, ICF 2013
volume
6
pages
8 pages
conference name
13th International Conference on Fracture 2013, ICF 2013
conference location
Beijing, China
conference dates
2013-06-16 - 2013-06-21
external identifiers
  • scopus:84898793475
ISBN
978-1-62993-369-6
language
English
LU publication?
yes
id
1143c6a8-bea8-4221-a742-17afd12a5aaa
date added to LUP
2019-01-15 14:28:42
date last changed
2022-02-15 08:56:02
@inproceedings{1143c6a8-bea8-4221-a742-17afd12a5aaa,
  abstract     = {{<p>Inconel 718 is a Ni-based superalloy that can perform excellently at elevated temperatures. However, surface and subsurface damages in the form of microstructural and property changes and tensile residual stresses are common in a machined Inconel 718 component because of its poor machinability. Such damages have a significant influence on performance and the life time of the part. To characterise microstructural damages and understand how they are correlated to machining conditions are not only important for the evaluation of surface integrity but also for the optimization of machining operations to minimise effects from the machining process. This paper uses the ECCI (electron channelling contrast imaging) and EBSD (electron back scatter diffraction) methods to study the effect of cutting tools and cutting speeds on subsurface plastic deformation of machined Inconel 718. When turning at 200 m/min, a comparable level of plastic deformation was found under the surface machined with uncoated cubic boron nitride (CBN), titanium nitride coated CBN and whisker reinforced alumina (WRA). With an increase in cutting speed, the plastic deformation depth increased, and uncoated CBN tools showed superior performance in term of subsurface microstructure alterations compared to the other tool materials.</p>}},
  author       = {{Chen, Zhe and Lin Peng, Ru and Zhou, Jinming and Moverare, Johan and Bushlya, Volodymyr and Johansson, Sten}},
  booktitle    = {{13th International Conference on Fracture 2013, ICF 2013}},
  isbn         = {{978-1-62993-369-6}},
  keywords     = {{EBSD; High speed turning; Inconel 718; Plastic deformation; Surface integrity; EBSD; High speed turning; Inconel 718; Plastic deformation; Surface Integrity; Alumnia; Cutting; Fracture; Machining Centers; Surfaces; Tools}},
  language     = {{eng}},
  month        = {{01}},
  pages        = {{4697--4704}},
  title        = {{ECCI and EBSD study of subsurface damages in high speed turning of inconel 718 under different tools and machining parameters}},
  volume       = {{6}},
  year         = {{2013}},
}