Performance of coated- and uncoated-carbide tools when drilling titanium alloy—Ti–6Al4V

By Safian Sharif, E. Rahim. 2007

226 citations recorded by the source corpus.

Abstract In this paper, the performance of uncoated-WC/Co and TiAlN–PVD coated-carbide twist drills were investigated when drilling titanium alloy, Ti–6Al4V. The effect of cutting speed on tool wear, tool life and surface finish of the hole when drilling using coolant were reported. Results showed that non-uniform flank wear, chipping and catastrophic failure were the dominant modes of tool failure for both coated- and uncoated-drills. It was found that at all cutting speeds tested, TiAlN-coated-drill significantly outperformed uncoated-drill in terms of tool life and surface finish. The highest tool life recorded for TiAlN-coated-drill was 7.8 min after drilling the 25th hole at the lowest cutting speed of 25 m/min and feed of 0.06 mm/rev. The effect of cutting speed on the performance of the uncoated-carbide drill was less significant at all cutting speed tested when all the drills failed prematurely with recorded tool lives of less than 1 min.

Subfields: Electrical and Electronic Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/7215b209d0dc199f5f911568c2930895f8254bd1

How researchers see this paper

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In Electrical and Electronic Engineering

1. Mohamed El Mansori
2. Z. Pei
3. Nikhi J. Churi
4. Jinyang Xu
5. Mihai Nicolescu
6. D. Aspinwall
7. Ali Mkaddem
8. Clyde Treadwell

In Mechanical Engineering

1. Mohamed El Mansori
2. S. Soo
3. Ali Mkaddem
4. Z. Pei
5. Nikhi J. Churi
6. Jinyang Xu
7. Mihai Nicolescu
8. D. Aspinwall

Citations in the corpus

• Hole quality assessment following drilling of metallic-composite stacks (2011, background): “1 mm/rev) is recommended for machining titanium alloys [3,4].”
• Influence of Tool Materials on Machinability of Titanium- and Nickel-Based Alloys: A Review (2014, methodology): “Sharif and Rehman [97] evaluated performance of coated- and uncoated-carbide tools when drilling Ti6Al4V.”
• Recent advances in drilling hybrid FRP/Ti composite: A state-of-the-art review (2016, background): “1 mm/rev) is recommended for titanium phase machining [1,20].”
• Experimental study on drilling mechanisms and strategies of hybrid CFRP/Ti stacks (2016, unknown): “…it is reported that the optimal cutting conditions for drilling composites are high cutting speed (150 – 200 m/min) and low feed rate (0.01 – 0.05 mm/rev) [21,22], while for Ti alloy machining, low cutting speed (10 – 30 m/min) and positive feed rate (0.05 – 0.1 mm/rev) are recommended [9,23].”
• MECHANICAL DRILLING PROCESSES FOR TITANIUM ALLOYS: A LITERATURE REVIEW (2008, methodology): “When using carbide drills, higher cutting speeds could produce lower surface roughness (Rahim and Sharif, 2006; Sharif and Rahim, 2007).”