Wear mechanisms of WC/Co tools when machining high-strength titanium alloy TB6 (Ti-10V-2Fe-3Al)

Bai, Dashan; Sun, Jianfei; Chen, Wuyi; Tianming, Wang

doi:10.1007/s00170-016-9607-z

Cited by 22 publications

(21 citation statements)

References 28 publications

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“…Longitudinal turning tests have been carried out on Leadwell LTC25iL CNC turning lathe supplying a maximum power of 24 kW. Based on the recommendations from previous studies [5] and due to the high chemical reactivity of titanium alloys, uncoated tungsten carbide inserts (ISO designation CNMG 12 04 12-23 H13A) have been used. An emulsion-based cutting fluid (5% concentration) has been used for the conventional lubrication tests and HPWJA tests at 100 bar (15 l/min) and 250 bar (26 l/min).…”

Section: Methodsmentioning

confidence: 99%

“…However, these alloys such as Ti-10V-2Fe-3Al and Ti-5Al-5V-5Mo-3Cr raise significant machinability problems [4], leading to severely reduced cutting conditions. This in turn leads to lower productivity [5].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the cutting forces are 20 to 40% higher for the Ti555-3 (depending on the tool rake angle). According to Bai et al [5], adhesion, diffusion and abrasion are the main tool wear mechanisms when machining the Ti-10V-2Fe-3Al titanium alloy. This lower machinablility has been explained by [8] as the result of higher mechanical properties, cutting temperatures, adhesion tendency and chip segmentation frequency.…”

Section: Introductionmentioning

confidence: 99%

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High-pressure water-jet-assisted machining of Ti555-3 titanium alloy: investigation of tool wear mechanisms

Ayed

Germain

2018

Int J Adv Manuf Technol

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The main objective of this study is to investigate uncoated tungsten carbide tool wear mechanisms for high-pressure waterjet machining of the Ti555-3 titanium alloy. A comparative study has been undertaken (i.e. conventional versus assisted machining) based on numerous experimental tests. These tests have been accompanied by the measurement of the cutting forces and flank wear. It is concluded that the high-pressure water-jet assistance can greatly increase tool life compared to conventional machining, for all cutting conditions. The gain in tool life depends on the severity of the cutting condition. The analyses performed for each test (i.e. SEM, EDS and 3D profilometer) made it possible to monitor the tool wear and to investigate the main wear mechanisms. Based on these analyses, adhesion wear appears to be the most influential mechanism and it is accelerated by an increase in water-jet pressure. Monitoring of the wear profile made it possible to study the evolution of crater wear and material chipping during machining.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-pressure water-jet-assisted machining of Ti555-3 titanium alloy: investigation of tool wear mechanisms

Ayed

Germain

2018

Int J Adv Manuf Technol

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“…Bu seramik katkıların oranlarındaki artışla sağlanan yüksek sıcaklık sertliği ve abrasiv aşınma dirençlerine rağmen, Co bağlayıcılar, takımın abrasiv etki dışında diğer aşınma mekanizmalarına karşı zafiyetini oluşturmaktadır. Özellikle çelik malzemelerin işlenmesinde kullanılan Co matrisli kesicilerde oluşan difüzyon ve yapışma etkili aşınma mekanizmaları, abrasiv aşınmadan daha etkin olabilmektedir [91][92][93][94][95]. Bu durumda, genel bilinene aykırı bir ilişki içinde, çeliğin sertliği ile takım aşınması veya ömrü arasında manidar bir ilişki olmayabilir.…”

Section: Ki̇myasal Bi̇leşi̇m Ve Mi̇kroyapininunclassified

Çeliklerin işlenebilirliği: kimyasal bileşim, mikroyapı, mekanik özellikler ve işlenebilirlik ilişkisi

Özçatalbaş

2020

Politeknik Dergisi

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ÖZ "İşlenebilirlik" işlenen malzemenin bir özelliğidir ve ancak malzemenin nitelikleri değiştirilerek işlenebilirliği değiştirilebilir. Bu durum ise, malzemenin kimyasal ve fiziksel özelliklerindeki değişimle sağlanır. Derleme niteliğindeki bu çalışma ile "İşlenebilirlik" kavramını kapsamlı şekilde açıklamak ve çeliklerin işlenebilirliğini geliştirmek amaçlı yapılan çalışmaları tartışmak amaçlanmıştır. İşlenebilirlik değerlendirmelerinde, genel olarak çeliklerin mekanik özellikleri ve esasen sertlikleri dikkate alınır. Sertliği arttıran esas element olan karbon miktarı ve ısıl işlemlerle oluşturulan mikroyapılarına bağlı işlenebilirlik değerlendirilir. Bununla birlikte, mekanik özelliklerde belirgin bir değişiklik oluşturmaksızın işlenebilirliği artıran S, Pb, Bi ve Te gibi elementlerin ilavesi, talaşlı işlenebilirliği önemli oranda geliştirir. İşlenebilirlik değerlendirmesi ise, talaş kaldırma sürecinde oluşan kesme kuvveti, takım ömrü, yüzey kalitesi ve talaş biçimi dikkate alınarak derecelendirilir. Kimyasal bileşim ve mikroyapının çeliklerin işlenebilirlik derecelendirmesine etkisi, malzeme ve metalürji bilimi alanında en çok çalışılan konulardan biridir. Çeliğin üretim sürecindeki değişkenlerinin yanında, ısıl işlemlerle oluşturulan mikroyapıya bağlı işlenebilirlik değerlendirmeleri de önemlidir. Belirtilen işlemlerle sağlanan mikroyapıdaki fazların heterojen dağılımları, işlenebilirlik değerlendirmelerinde göz ardı edilmemelidir.

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“…At the same time, a higher cutting speed showed smaller built-up edges on the inserts. The formation of built-up edges on the uncoated carbide tool insert was identified [29][30][31]. The reason behind this was the active adhesion of workpiece elements on the carbide cutting insert edges.…”

Section: Optimization Of Cryogenic Turning Performance Using Topsismentioning

confidence: 99%

Investigation of AlCrN-Coated Inserts on Cryogenic Turning of Ti-6Al-4V Alloy

Selvam

Murugesan

Dhananchezian³

et al. 2019

Metals

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Over the past decade, the focus of the metal cutting industry has been on the improvement of tool life for achieving higher productivity and better finish. Researchers are attempting to reduce tool failure in several ways such as modified coating characteristics of a cutting tool, conventional coolant, cryogenic coolant, and cryogenic treated insert. In this study, a single layer coating was made on cutting carbide inserts with newly determined thickness. Coating thickness, presence of coating materials, and coated insert hardness were observed. This investigation also dealt with the effect of machining parameters on the cutting force, surface finish, and tool wear when turning Ti-6Al-4V alloy without coating and Physical Vapor Deposition (PVD)-AlCrN coated carbide cutting inserts under cryogenic conditions. The experimental results showed that AlCrN-based coated tools with cryogenic conditions developed reduced tool wear and surface roughness on the machined surface, and cutting force reductions were observed when a comparison was made with the uncoated carbide insert. The best optimal parameters of a cutting speed (V c ) of 215 m/min, feed rate (f) of 0.102 mm/rev, and depth of cut (doc) of 0.5 mm are recommended for turning titanium alloy using the multi-response TOPSIS technique. on the workpiece materials and cutting conditions [2]. Various coated cutting tools (e.g., TiN, TiAlN, AlTiN, CrN) are available on the market, but machining of Ti alloy still sees problems like the formation of built-up edges on the tools, a rise in wear marks on the cutting edges, and poor quality of machined surfaces. Hence, it is vital to assess the machinability characteristics of Ti alloys in the turning operation using appropriate coatings on cutting tools and advanced techniques of cryogenic lubrication.Chauhan and Rawal [3] reported on nitride ion-based coatings, such as TiAlN, TiMoN, and TiVN, with different deposition techniques. They implied ternary nitride-based coatings showing a higher improvement in tribological and mechanical properties compared to the binary nitride coatings. Bouzakis et al. [4] discussed the evolution of cutting tool coating elements, related coating deposition techniques, manufacturing methods, recent characterization methods, film dimensional thickness, and recondition of wear on coated cutting tools. Their paper shows that as productivity increases, so does the need for improvement. Biksa et al. [5] analyzed the self-adaptive functional coating on cutting tools while machining nickel and titanium-based alloys. It showed the attainment of a better life for AlTiN/MoN-coated tools when machining Inconel 781 and AlTiN/VN-coated tools for Ti-Al6-V4 alloy. This coating was seen as having a smaller coefficient of friction at specific elevated temperatures. Nordegren et al. [6] investigated the plastic deformation modeling on layered carbide tool edges when machining AISI 4340 steel. The result indicated a determined finite element model for the edge thermal effect of the machining process.Ghani et al....

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Wear mechanisms of WC/Co tools when machining high-strength titanium alloy TB6 (Ti-10V-2Fe-3Al)

Cited by 22 publications

References 28 publications

High-pressure water-jet-assisted machining of Ti555-3 titanium alloy: investigation of tool wear mechanisms

High-pressure water-jet-assisted machining of Ti555-3 titanium alloy: investigation of tool wear mechanisms

Çeliklerin işlenebilirliği: kimyasal bileşim, mikroyapı, mekanik özellikler ve işlenebilirlik ilişkisi

Investigation of AlCrN-Coated Inserts on Cryogenic Turning of Ti-6Al-4V Alloy

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