Effect of drill geometry of uncoated tool when drilling titanium alloy, Ti-6Al-4V

Titanium alloys are widely used in various applications such as in aerospace industry, especially in airframes and engine components due to their high strength-weight ratio that is maintained at elevated temperature and their exceptional corrosion resistance. Nevertheless, titanium and its alloys ar...

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Main Author:	Rashiddy Wong, Freddawati
Format:	Thesis
Language:	English
Published:	2008
Subjects:	TJ Mechanical engineering and machinery TS Manufactures
Online Access:	http://eprints.utm.my/id/eprint/9528/1/FreddawatiRashiddyWongMFKM2008.pdf
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id	my-utm-ep.9528
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spelling	my-utm-ep.95282018-07-19T01:51:16Z Effect of drill geometry of uncoated tool when drilling titanium alloy, Ti-6Al-4V 2008-11 Rashiddy Wong, Freddawati TJ Mechanical engineering and machinery TS Manufactures Titanium alloys are widely used in various applications such as in aerospace industry, especially in airframes and engine components due to their high strength-weight ratio that is maintained at elevated temperature and their exceptional corrosion resistance. Nevertheless, titanium and its alloys are difficult-to-machine material due to their poor thermal properties and highly chemical reactivity. In this study, Ti-6Al-4V had been drilled using different drill point geometry under various cutting speeds and feed rate. The tools are Tool A (spiral point), Tool B (3 facet) and Tool C (4 facet). The tool life, tool wear and surface roughness were analyzed under various cutting speeds and feed rates. In this study, Type C drills outperformed Type A and B drills in terms of tool life for almost all the cutting conditions tested. At the lowest cutting speed of 50 m/min and lowest feed rate, 0.05 mm/rev, Tool C demonstrated the longest tool life, which resulted in low tool wear rate. The excellent improvement of Tool C give higher tool life compared to Tool A and Tool B when drilling at higher cutting speeds. Its due to its multi-faceted geometry and web thickness. Non-uniform flank wear, chipping and catastrophic failure were the dominant failure modes of all tools under most cutting conditions tested. These failure modes were mainly associated with adhesion, diffusion and plastic deformation wear mechanisms. Based from the results obtained, it can be suggested that Type C drill was recommended and the lower cutting speed of 50 m/min should be employed in order to achieve high performance in drilling titanium alloy, Ti- 6Al-4V. 2008-11 Thesis http://eprints.utm.my/id/eprint/9528/ http://eprints.utm.my/id/eprint/9528/1/FreddawatiRashiddyWongMFKM2008.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TJ Mechanical engineering and machinery TS Manufactures
spellingShingle	TJ Mechanical engineering and machinery TS Manufactures Rashiddy Wong, Freddawati Effect of drill geometry of uncoated tool when drilling titanium alloy, Ti-6Al-4V
description	Titanium alloys are widely used in various applications such as in aerospace industry, especially in airframes and engine components due to their high strength-weight ratio that is maintained at elevated temperature and their exceptional corrosion resistance. Nevertheless, titanium and its alloys are difficult-to-machine material due to their poor thermal properties and highly chemical reactivity. In this study, Ti-6Al-4V had been drilled using different drill point geometry under various cutting speeds and feed rate. The tools are Tool A (spiral point), Tool B (3 facet) and Tool C (4 facet). The tool life, tool wear and surface roughness were analyzed under various cutting speeds and feed rates. In this study, Type C drills outperformed Type A and B drills in terms of tool life for almost all the cutting conditions tested. At the lowest cutting speed of 50 m/min and lowest feed rate, 0.05 mm/rev, Tool C demonstrated the longest tool life, which resulted in low tool wear rate. The excellent improvement of Tool C give higher tool life compared to Tool A and Tool B when drilling at higher cutting speeds. Its due to its multi-faceted geometry and web thickness. Non-uniform flank wear, chipping and catastrophic failure were the dominant failure modes of all tools under most cutting conditions tested. These failure modes were mainly associated with adhesion, diffusion and plastic deformation wear mechanisms. Based from the results obtained, it can be suggested that Type C drill was recommended and the lower cutting speed of 50 m/min should be employed in order to achieve high performance in drilling titanium alloy, Ti- 6Al-4V.
format	Thesis
qualification_level	Master's degree
author	Rashiddy Wong, Freddawati
author_facet	Rashiddy Wong, Freddawati
author_sort	Rashiddy Wong, Freddawati
title	Effect of drill geometry of uncoated tool when drilling titanium alloy, Ti-6Al-4V
title_short	Effect of drill geometry of uncoated tool when drilling titanium alloy, Ti-6Al-4V
title_full	Effect of drill geometry of uncoated tool when drilling titanium alloy, Ti-6Al-4V
title_fullStr	Effect of drill geometry of uncoated tool when drilling titanium alloy, Ti-6Al-4V
title_full_unstemmed	Effect of drill geometry of uncoated tool when drilling titanium alloy, Ti-6Al-4V
title_sort	effect of drill geometry of uncoated tool when drilling titanium alloy, ti-6al-4v
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2008
url	http://eprints.utm.my/id/eprint/9528/1/FreddawatiRashiddyWongMFKM2008.pdf
_version_	1747814747473969152

Effect of drill geometry of uncoated tool when drilling titanium alloy, Ti-6Al-4V

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