Enhancement of surface integrity in cryogenic high speed ball nose end milling process of inconel 718

Surface integrity of machined subsurface in any machining process has become an important aspect because of increased quality demands especially in high accuracy demand industries like aerospace, automotive, defense and medical applications. The attention of these industries is to achieve a good sur...

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Main Authors:	Musfirah, Abdul Hadi, Jaharah, A. Ghani
Format:	Conference or Workshop Item
Language:	English English
Published:	Springer 2020
Subjects:	TJ Mechanical engineering and machinery TS Manufactures
Online Access:	http://umpir.ump.edu.my/id/eprint/26479/ http://umpir.ump.edu.my/id/eprint/26479/ http://umpir.ump.edu.my/id/eprint/26479/1/72.%20Enhancement%20of%20surface%20integrity%20in%20cryogenic%20high%20speed%20ball.pdf http://umpir.ump.edu.my/id/eprint/26479/2/72.1%20Enhancement%20of%20surface%20integrity%20in%20cryogenic%20high%20speed%20ball.pdf

id	ump-26479
recordtype	eprints
spelling	ump-264792019-12-04T07:56:51Z http://umpir.ump.edu.my/id/eprint/26479/ Enhancement of surface integrity in cryogenic high speed ball nose end milling process of inconel 718 Musfirah, Abdul Hadi Jaharah, A. Ghani TJ Mechanical engineering and machinery TS Manufactures Surface integrity of machined subsurface in any machining process has become an important aspect because of increased quality demands especially in high accuracy demand industries like aerospace, automotive, defense and medical applications. The attention of these industries is to achieve a good surface roughness, avoid plastically deformed layer and most cases increasing the hardness at the subsurface area for robust application. As is known, Inconel 718 is a difficult-to-machine material and it is often used in the manufacture of turbine gas and jet engines for aerospace applications. In most cases, Inconel 718 machining will be resulting an excessive heat generated at the cutting zone. This can cause in a variety of problems during machining such as rapid tool wear, damage on machined surface and microstructural defects. Hence, various cooling methods have been made to address these problems and improve the quality of machined surface. In this study, a cryogenic cooling technique using nitrogen liquids (LN2) was developed to cool the tool-chip interface during milling Inconel 718. The goal of this paper is to presents a comparison study on surface roughness, machined surface microhardness and subsurface microstructure changes between cryogenic cooling and dry techniques. The experiments conducted using a PVD coated with TiAlN/AlCrN ball nose tungsten carbide for varying cutting speeds ranging between 140–160 m/min, a feed rate of 0.15-0.20 mm/tooth, and radial depth of cut of 0.2-0.4 mm. The results revealed that the cryogenic cooling technique is more effective than dry cutting for improving surface roughness and lessening deformation of microstructure changes underneath the machined surface. However, machining in dry technique has produced a high microhardness for machined surface compared to cryogenic cooling technique. Overall, the utilization of the cryogenic technique has improved the surface roughness to a maximum of 88% and reduced the plastic deformation layer, while dry machining can improve the surface microhardness up to 5%. Springer 2020 Conference or Workshop Item PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/26479/1/72.%20Enhancement%20of%20surface%20integrity%20in%20cryogenic%20high%20speed%20ball.pdf pdf en http://umpir.ump.edu.my/id/eprint/26479/2/72.1%20Enhancement%20of%20surface%20integrity%20in%20cryogenic%20high%20speed%20ball.pdf Musfirah, Abdul Hadi and Jaharah, A. Ghani (2020) Enhancement of surface integrity in cryogenic high speed ball nose end milling process of inconel 718. In: iMEC-APCOMS 2019: Proceedings of the 4th International Manufacturing Engineering Conference and The 5th Asia Pacific Conference on Manufacturing Systems, 21-22 August 2019 , Putrajaya, Malaysia. pp. 512-518.. ISBN 978-981-15-0950-6 https://doi.org/10.1007/978-981-15-0950-6_78
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English English
topic	TJ Mechanical engineering and machinery TS Manufactures
spellingShingle	TJ Mechanical engineering and machinery TS Manufactures Musfirah, Abdul Hadi Jaharah, A. Ghani Enhancement of surface integrity in cryogenic high speed ball nose end milling process of inconel 718
description	Surface integrity of machined subsurface in any machining process has become an important aspect because of increased quality demands especially in high accuracy demand industries like aerospace, automotive, defense and medical applications. The attention of these industries is to achieve a good surface roughness, avoid plastically deformed layer and most cases increasing the hardness at the subsurface area for robust application. As is known, Inconel 718 is a difficult-to-machine material and it is often used in the manufacture of turbine gas and jet engines for aerospace applications. In most cases, Inconel 718 machining will be resulting an excessive heat generated at the cutting zone. This can cause in a variety of problems during machining such as rapid tool wear, damage on machined surface and microstructural defects. Hence, various cooling methods have been made to address these problems and improve the quality of machined surface. In this study, a cryogenic cooling technique using nitrogen liquids (LN2) was developed to cool the tool-chip interface during milling Inconel 718. The goal of this paper is to presents a comparison study on surface roughness, machined surface microhardness and subsurface microstructure changes between cryogenic cooling and dry techniques. The experiments conducted using a PVD coated with TiAlN/AlCrN ball nose tungsten carbide for varying cutting speeds ranging between 140–160 m/min, a feed rate of 0.15-0.20 mm/tooth, and radial depth of cut of 0.2-0.4 mm. The results revealed that the cryogenic cooling technique is more effective than dry cutting for improving surface roughness and lessening deformation of microstructure changes underneath the machined surface. However, machining in dry technique has produced a high microhardness for machined surface compared to cryogenic cooling technique. Overall, the utilization of the cryogenic technique has improved the surface roughness to a maximum of 88% and reduced the plastic deformation layer, while dry machining can improve the surface microhardness up to 5%.
format	Conference or Workshop Item
author	Musfirah, Abdul Hadi Jaharah, A. Ghani
author_facet	Musfirah, Abdul Hadi Jaharah, A. Ghani
author_sort	Musfirah, Abdul Hadi
title	Enhancement of surface integrity in cryogenic high speed ball nose end milling process of inconel 718
title_short	Enhancement of surface integrity in cryogenic high speed ball nose end milling process of inconel 718
title_full	Enhancement of surface integrity in cryogenic high speed ball nose end milling process of inconel 718
title_fullStr	Enhancement of surface integrity in cryogenic high speed ball nose end milling process of inconel 718
title_full_unstemmed	Enhancement of surface integrity in cryogenic high speed ball nose end milling process of inconel 718
title_sort	enhancement of surface integrity in cryogenic high speed ball nose end milling process of inconel 718
publisher	Springer
publishDate	2020
url	http://umpir.ump.edu.my/id/eprint/26479/ http://umpir.ump.edu.my/id/eprint/26479/ http://umpir.ump.edu.my/id/eprint/26479/1/72.%20Enhancement%20of%20surface%20integrity%20in%20cryogenic%20high%20speed%20ball.pdf http://umpir.ump.edu.my/id/eprint/26479/2/72.1%20Enhancement%20of%20surface%20integrity%20in%20cryogenic%20high%20speed%20ball.pdf
first_indexed	2023-09-18T22:41:16Z
last_indexed	2023-09-18T22:41:16Z
_version_	1777416930979741696

Enhancement of surface integrity in cryogenic high speed ball nose end milling process of inconel 718

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