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

Sharif, Safian; Rahim, Erween Abd

doi:10.1016/j.jmatprotec.2006.03.142

Cited by 187 publications

(94 citation statements)

References 12 publications

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“…When machining Ti, the tool wear progresses rapidly because of high cutting temperature and strong adhesion between the tool and workpiece (Narutaki and Murakoshi, 1983). And the high stresses developed at the cutting edge of the tool may cause plastic deformation and/or accelerate the tool wear (Dearnley and Grearson, 1986;Dornfeld et al, 1999;Konig, 1979;Sharif and Rahim, 2007;Yang and Liu, 1999).…”

Section: Tool Wear and Tool Lifementioning

confidence: 99%

“…Notching, non-uniform flank wear, crater wear, chipping, and catastrophic failure are the prominent failure modes when drilling Ti Sharif and Rahim, 2007).…”

Section: Tool Wear and Tool Lifementioning

confidence: 99%

“…A small change in cutting speed could cause a very large change in tool wear rate (Ezudwu, 1997;Yang and Liu, 1999). It was reported that tool wear was extremely severe at high cutting speeds but improved dramatically as the speed decreased (Ezudwu, 1997;Sharif and Rahim, 2007).…”

Section: Effects Of Cutting Speedmentioning

confidence: 99%

“…Coated drills suffered less damage which suggested that the hard coating material protected the tool and substantially reduced the wear rate of the substrate (Sharif and Rahim, 2007).…”

Section: Effects Of Drill Geometry and Materialsmentioning

confidence: 99%

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Mechanical Drilling Processes for Titanium Alloys: A Literature Review

Zhang

Churi

Pei

et al. 2008

Machining Science and Technology

120

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Titanium and its alloys (Ti) are attractive for many applications due to their superior properties.However, they are regarded as hard-to-machine materials. Drilling is an important machining process since it is involved in nearly all Ti applications. It is desirable to develop cost-effective drilling processes for Ti and/or improve the cost-effectiveness of currently-available processes. Such development and improvement will be benefited by a comprehensive literature review of drilling processes for Ti. This paper presents a literature review on mechanical drilling processes for Ti, namely, twist drilling, vibration assisted twist drilling, ultrasonic machining, and rotary ultrasonic machining. It discusses cutting force, cutting temperature, tool wear and tool life, hole quality (diameter and cylindricity, surface roughness, and burr), and chip type when drilling of Ti using these processes.

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Section: Tool Wear and Tool Lifementioning

confidence: 99%

“…Notching, non-uniform flank wear, crater wear, chipping, and catastrophic failure are the prominent failure modes when drilling Ti Sharif and Rahim, 2007).…”

Section: Tool Wear and Tool Lifementioning

confidence: 99%

Section: Effects Of Cutting Speedmentioning

confidence: 99%

“…Coated drills suffered less damage which suggested that the hard coating material protected the tool and substantially reduced the wear rate of the substrate (Sharif and Rahim, 2007).…”

Section: Effects Of Drill Geometry and Materialsmentioning

confidence: 99%

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Mechanical Drilling Processes for Titanium Alloys: A Literature Review

Zhang

Churi

Pei

et al. 2008

Machining Science and Technology

120

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“…Ti-64 has some similarities with Ti-6246. In drilling Titanium alloy Ti-64, TiAlN coating tool was more superior to the uncoated tool, it increased tool life by 2416% at the same cutting speed of 25 m/min [12]. In contrast, tool delamination occurred in 5 seconds when face milling of Ti-6246 used TiN coated carbide [13].…”

Section: Introductionmentioning

confidence: 99%

Performance of TiAlN PVD Coated Carbide Drill when Drilling Titanium 6246 Alloy

2017

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Abstract. This article describes the TiAlN PVD coated carbide drill tool performance after being used for drilling of Ti-6246 Titanium alloy. Every drill bit was used for single drilling and then being observed with SEM from flank and rake view. Taguchi method L18 design of experiment was used to find the optimum parameters. Wear was not found in this research, however, the tool delamination and tool chipping was evidenced, even if drilling only 10 mm depth. Tool experienced built-up edge in the outer blade, inner blade and at the chisel. This BUE can be seen at both view, i.e. rake and flank sides. BUE is the most dominant deterioration and inevitably in drilling this alloy, regardless the parameters applied. Tool delamination may occur during mechanism of peeling off the BUE. While chipping was related to higher feed rate, that may relate to high MRR. Analysing data using Minitab 17 shows that combination of drilling without cooling, 30 mm deep, cutting speed of 50 m/min and feed rate of 0.15 mm/min would result in the best performance of TiAlN tool for drilling Ti6246 as received.

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