Experimental evaluation of surface quality characteristics in laser machining of nickel-based superalloy

Adam Khan M; K. Gupta

doi:10.1016/j.ijleo.2019.163199

Experimental evaluation of surface quality characteristics in laser machining of nickel-based superalloy

Adam Khan M, K. Gupta

Mechanical and Industrial Engineering Technology

University of Johannesburg

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

This paper reports the investigation results of CO₂ laser machining of Inconel 718 superalloy. Investigation on the effects of the two important laser parameters power and travel speed on machinability i.e. material removal rate, kerf wall inclination, and average surface roughness of Inconel 718 has been conducted. Increased kerf wall inclination has been found with slow travel speed and increasing power. Low power and high travel speed produced maximum material removal rate and minimum surface roughness. Premature state of fusion has advanced dross regime at a slow cutting speed of 3.3 m/min and leading to a surface roughness of 9.3 microns maximum. Dendrite structures were formed and changes in surface hardness were observed due to high travel speed. Therefore, based on the investigation, slow travel speed with appropriate laser power is recommended for the improved machinability and surface quality during laser machining of Inconel 718 superalloy.

Original language	English
Article number	163199
Journal	Optik
Volume	196
DOIs	https://doi.org/10.1016/j.ijleo.2019.163199
Publication status	Published - Nov 2019

Keywords

Kerf
Laser
Microstructure
Roughness
Superalloy
Surface
Wear

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1016/j.ijleo.2019.163199

Cite this

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title = "Experimental evaluation of surface quality characteristics in laser machining of nickel-based superalloy",

abstract = "This paper reports the investigation results of CO2 laser machining of Inconel 718 superalloy. Investigation on the effects of the two important laser parameters power and travel speed on machinability i.e. material removal rate, kerf wall inclination, and average surface roughness of Inconel 718 has been conducted. Increased kerf wall inclination has been found with slow travel speed and increasing power. Low power and high travel speed produced maximum material removal rate and minimum surface roughness. Premature state of fusion has advanced dross regime at a slow cutting speed of 3.3 m/min and leading to a surface roughness of 9.3 microns maximum. Dendrite structures were formed and changes in surface hardness were observed due to high travel speed. Therefore, based on the investigation, slow travel speed with appropriate laser power is recommended for the improved machinability and surface quality during laser machining of Inconel 718 superalloy.",

keywords = "Kerf, Laser, Microstructure, Roughness, Superalloy, Surface, Wear",

author = "M, {Adam Khan} and K. Gupta",

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year = "2019",

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doi = "10.1016/j.ijleo.2019.163199",

language = "English",

volume = "196",

journal = "Optik",

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T1 - Experimental evaluation of surface quality characteristics in laser machining of nickel-based superalloy

AU - M, Adam Khan

AU - Gupta, K.

PY - 2019/11

Y1 - 2019/11

N2 - This paper reports the investigation results of CO2 laser machining of Inconel 718 superalloy. Investigation on the effects of the two important laser parameters power and travel speed on machinability i.e. material removal rate, kerf wall inclination, and average surface roughness of Inconel 718 has been conducted. Increased kerf wall inclination has been found with slow travel speed and increasing power. Low power and high travel speed produced maximum material removal rate and minimum surface roughness. Premature state of fusion has advanced dross regime at a slow cutting speed of 3.3 m/min and leading to a surface roughness of 9.3 microns maximum. Dendrite structures were formed and changes in surface hardness were observed due to high travel speed. Therefore, based on the investigation, slow travel speed with appropriate laser power is recommended for the improved machinability and surface quality during laser machining of Inconel 718 superalloy.

AB - This paper reports the investigation results of CO2 laser machining of Inconel 718 superalloy. Investigation on the effects of the two important laser parameters power and travel speed on machinability i.e. material removal rate, kerf wall inclination, and average surface roughness of Inconel 718 has been conducted. Increased kerf wall inclination has been found with slow travel speed and increasing power. Low power and high travel speed produced maximum material removal rate and minimum surface roughness. Premature state of fusion has advanced dross regime at a slow cutting speed of 3.3 m/min and leading to a surface roughness of 9.3 microns maximum. Dendrite structures were formed and changes in surface hardness were observed due to high travel speed. Therefore, based on the investigation, slow travel speed with appropriate laser power is recommended for the improved machinability and surface quality during laser machining of Inconel 718 superalloy.

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KW - Laser

KW - Microstructure

KW - Roughness

KW - Superalloy

KW - Surface

KW - Wear

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M3 - Article

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ER -

Experimental evaluation of surface quality characteristics in laser machining of nickel-based superalloy

Abstract

Keywords

ASJC Scopus subject areas

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