Wear of TiAlN and DLC coated microtools in micromilling of Ti-6Al-4V alloy

Ziberov, Maksym; Oliveira, Déborah de; Silva, Márcio Bacci da; Hung, Wayne

doi:10.1016/j.jmapro.2020.04.082

Cited by 34 publications

(9 citation statements)

References 30 publications

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“…Figure 6 shows values of surface roughness, Sa, as a function of fz. It can be noted that roughness has a direct relation with fz, being Sa = 55 nm, the lowest value using fz = 3 µm, similar to results found by Ziberov et al,2020 [23]. In contrast, the channel machined with fz = 15 µm reached a maximum of Sa = 321 µm, combined with a relatively high value of burr height.…”

Section: Resultssupporting

confidence: 85%

Tool Feed and Burr Size Influence on Wettability of Ti6Al4V Micro End-Milled

Ferreira

Martinelli

Rodrigues

et al. 2021

IJEMM

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Surface texturing, using micro-milling, has promising applications in the industry of medical implants, since it can assist cell adhesion and thus improve osseointegration. Ti6Al4V alloy is used as implant material due to its excellent biocompatibility and high mechanical strength. However, those mechanical properties reduce machinability creating some challenges for micro-milling. The way to initially assess cell adhesion is using surface wettability, usually conducted with water. At the present work, micro-channels were machined in Ti6Al4V by micro end-milling with 500 µm width per 50 µm depth with 1000 µm distant from each other. The effect of feed per tooth (fz) on wettability was analysed and some interesting relations with burrs formed on channel walls were obtained. Values of feed per tooth were 3, 6, 12 and 15 µm. Wettability results showed that slotted surface is more hydrophilic on channel direction, with contact angles around 30° to 43°. In contrast, on the perpendicular direction the surface tends to be hydrophobic with contact angles between 75° and 146°. In addition, contact angle increases (hydrophobic tendency) as feed per tooth increases (along with roughness), even on channel direction. The presence of burrs also tends to disturb wettability results. Therefore, surface wettability depends on channel direction, burr size and tool feed per tooth, as well.

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Section: Resultssupporting

confidence: 85%

Tool Feed and Burr Size Influence on Wettability of Ti6Al4V Micro End-Milled

Ferreira

Martinelli

Rodrigues

et al. 2021

IJEMM

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“…There is a recent trend for the application of TiAlN based coatings for micromilling [74], this because of the properties that make this coating ideal for high-speed machining, whose are also suited for this process, due to high rotational speeds usually used in micro-machining. Recent studies focus on the machining of hard-to-machine alloys [75], employing TiAlN coatings and AlTiN [76] coatings in the machining of titanium alloys [75,76] and nickel-based superalloys, such as Nimonic 75 [77]. The main wear mechanism sustained by coated micro-milling tools, when machining hard-to-machine materials, are adhesion and abrasion, as seen for the milling process, with cutting speed and depth of cut being registered as the main influencer on the development of this wear.…”

Section: Milling Processmentioning

confidence: 99%

“…It was noticed that there are many research papers about milling operations using the TiAlN-based coated tools. However, for both machining cases, it was found that there is a large interest in the study of the wear performance of these coatings in the cutting of steels [70,71,74,81,83,97,98,100,[111][112][113][114]117], titanium alloys [72,75,76,82,96,115,116] and Inconel [73,[78][79][80]99]. This is due to these alloys being employed in the aeronautical industry, making the study of the machinability of these materials quite interesting.…”

Section: Current Research Trends Of Tialn-based Coatingsmentioning

confidence: 99%

Characteristics and Wear Mechanisms of TiAlN-Based Coatings for Machining Applications: A Comprehensive Review

Sousa

Silva

Pinto

et al. 2021

Metals

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The machining process is still a very relevant process in today’s industry, being used to produce high quality parts for multiple industry sectors. The machining processes are heavily researched, with the focus on the improvement of these processes. One of these process improvements was the creation and implementation of tool coatings in various machining operations. These coatings improved overall process productivity and tool-life, with new coatings being developed for various machining applications. TiAlN coatings are still very present in today’s industry, being used due to its incredible wear behavior at high machining speeds, high mechanical properties, having a high-thermal stability and high corrosion resistance even at high machining temperatures. Novel TiAlN-based coatings doped with Ru, Mo and Ta are currently under investigation, as they show tremendous potential in terms of mechanical properties and wear behavior improvement. With the improvement of deposition technology, recent research seems to focus primarily on the study of nanolayered and nanocomposite TiAlN-based coatings, as the thinner layers improve drastically these coating’s beneficial properties for machining applications. In this review, the recent developments of TiAlN-based coatings are going to be presented, analyzed and their mechanical properties and cutting behavior for the turning and milling processes are compared.

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“…Ziberov et al [77] micro-milled Ti-6Al-4 V alloy with 152.4 μm diameter uncoated tungsten carbide, and tools with diamond-like carbon (DLC) and TiAlN coating. Cutting parameters included 9.6 m/min speed, 0.1 μm chip load, 10.0 μm axial depth of cut in MQL (Coolube 2210EP, 40.7 mL/h flow rate).…”

Section: Cutting Fluidmentioning

confidence: 99%

“…In recent studies, Ziberov et al [77] studied the wear and tool life of TiAlN and diamond-like-coating (DLC) on two-flute coated micro-tools with 152.4 μm diameter when micro-milling Ti-6Al-4V. The cutting parameters used were cutting speed of 9.6 m/min, feed rate of 0.1 μm/tooth and axial depth of cut of 10 μm.…”

Section: Tool Coatingmentioning

confidence: 99%

Micro-machining of additively manufactured metals: a review

Gomes

Santos

Oliveira

et al. 2021

Int J Adv Manuf Technol

Self Cite

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Metal additive manufacturing (MAM) has attracted significant interest in both academia and industry to produce near-netshape engineering components. The inherent defects in MAM, however, require suitable subtractive techniques as postprocesses to control dimensional and geometric tolerances as well as surface finish. The additively manufactured metals, with different microstructures than the wrought materials that produced by conventional routes, need different approaches and parameters when being machined. This review covers recent published literature on traditional micro-machining as a post-processing operation for MAM and recommends future directions. The text presents a brief review on the main AM processes followed by a comprehensive conventional micro-milling and microdrilling, as well as applications for micromachining. Micro-tool assessment, built-up-edge prediction and prevention, and link of macro/micro-machining are areas for future research.

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Wear of TiAlN and DLC coated microtools in micromilling of Ti-6Al-4V alloy

Cited by 34 publications

References 30 publications

Tool Feed and Burr Size Influence on Wettability of Ti6Al4V Micro End-Milled

Tool Feed and Burr Size Influence on Wettability of Ti6Al4V Micro End-Milled

Characteristics and Wear Mechanisms of TiAlN-Based Coatings for Machining Applications: A Comprehensive Review

Micro-machining of additively manufactured metals: a review

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