The Experts below are selected from a list of 897 Experts worldwide ranked by ideXlab platform
T Sornakuma - One of the best experts on this subject based on the ideXlab platform.
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Wear behaviour of alumina based ceramic cutting tools on machining steels
Tribology International, 2006Co-Authors: Senthil A Kuma, Raja A Durai, T SornakumaAbstract:The advanced ceramic cutting tools have very good Wear resistance, high refractoriness, good mechanical strength and hot hardness. Alumina based ceramic cutting tools have very high abrasion resistance and hot hardness. Chemically they are more stable than high-speed steels and carbides, thus having less tendency to adhere to metals during machining and less tendency to form built-up edge. This results in good surface finish and dimensional accuracy in machining steels. In this paper Wear behaviour of alumina based ceramic cutting tools is investigated. The machining tests were conducted using SiC whisker reinforced alumina ceramic cutting tool and Ti[C,N] mixed alumina ceramic cutting tool on martensitic stainless steel-grade 410 and EN 24 steel work pieces. Flank Wear in Ti[C,N] mixed alumina ceramic cutting tool is lower than that of the SiC whisker reinforced alumina cutting tool. SiC whisker reinforced alumina cutting tool exhibits poor crater Wear resistance while machining. Notch Wear in SiC whisker reinforced alumina cutting tool is lower than that of the Ti[C,N] mixed alumina ceramic cutting tool. The flank Wear, crater Wear and Notch Wear are higher on machining martensitic stainless steel than on machining hardened steel. In summary Ti[C,N] mixed alumina cutting tool performs better than SiC whisker reinforced alumina cutting tool on machining martensitic stainless steel.
Raja A Durai - One of the best experts on this subject based on the ideXlab platform.
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the effect of tool Wear on tool life of alumina based ceramic cutting tools while machining hardened martensitic stainless steel
Journal of Materials Processing Technology, 2006Co-Authors: Senthil A Kumar, Raja A Durai, T SornakumarAbstract:Abstract Tool life is an important parameter in evaluating the performance of the cutting tools. Tool Wear affects dimensions and surface quality of the workpiece and it is also one of the important criteria in determining tool life. When the tool reaches the tool Wear criterion, the cutting edge fails and cannot be used further. Machining studies have been conducted on hardened martensitic stainless steel (HRC 60) to analyse the effect of tool Wear on tool life of alumina ceramic cutting tools. The tool Wear such as flank Wear, crater Wear and Notch Wear are noted. These Wear data are used to develop mathematical tool Wear models using multiple regression analysis (MRA). Tool life of the alumina-based ceramic cutting tools is evaluated from these tool Wear models and the effect of various types of Wear on tool life is analysed while machining hardened martensitic stainless steel.
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Wear behaviour of alumina based ceramic cutting tools on machining steels
Tribology International, 2006Co-Authors: Senthil A Kuma, Raja A Durai, T SornakumaAbstract:The advanced ceramic cutting tools have very good Wear resistance, high refractoriness, good mechanical strength and hot hardness. Alumina based ceramic cutting tools have very high abrasion resistance and hot hardness. Chemically they are more stable than high-speed steels and carbides, thus having less tendency to adhere to metals during machining and less tendency to form built-up edge. This results in good surface finish and dimensional accuracy in machining steels. In this paper Wear behaviour of alumina based ceramic cutting tools is investigated. The machining tests were conducted using SiC whisker reinforced alumina ceramic cutting tool and Ti[C,N] mixed alumina ceramic cutting tool on martensitic stainless steel-grade 410 and EN 24 steel work pieces. Flank Wear in Ti[C,N] mixed alumina ceramic cutting tool is lower than that of the SiC whisker reinforced alumina cutting tool. SiC whisker reinforced alumina cutting tool exhibits poor crater Wear resistance while machining. Notch Wear in SiC whisker reinforced alumina cutting tool is lower than that of the Ti[C,N] mixed alumina ceramic cutting tool. The flank Wear, crater Wear and Notch Wear are higher on machining martensitic stainless steel than on machining hardened steel. In summary Ti[C,N] mixed alumina cutting tool performs better than SiC whisker reinforced alumina cutting tool on machining martensitic stainless steel.
Onur Ozbek - One of the best experts on this subject based on the ideXlab platform.
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effect of cutting conditions on Wear performance of cryogenically treated tungsten carbide inserts in dry turning of stainless steel
Tribology International, 2016Co-Authors: Nursel Altan Ozbek, Adem Cicek, Mahmut Gulesin, Onur OzbekAbstract:Abstract In this study, the effects of cryogenic treatment on tool Wear of uncoated tungsten carbide inserts were investigated in the turning of AISI 316 stainless steel. It was found that Notch Wear appeared at low and medium cutting speeds, while flank Wear and crater Wear formed at all combinations of the process parameters selected for turning. In addition, treated inserts exhibited superior Wear performance to untreated ones. This can be attributed to high Wear resistance and low thermal conductivity of treated inserts. The results were verified by analyses of microstructure and hardness, image processing and X-ray diffraction.
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investigation of the effects of cryogenic treatment applied at different holding times to cemented carbide inserts on tool Wear
International Journal of Machine Tools & Manufacture, 2014Co-Authors: Nursel Altan Ozbek, Adem Cicek, Mahmut Gulesin, Onur OzbekAbstract:Abstract Cutting tool costs is one of the most important components of machining costs. For this reason, tool life should be improved using some methods such as cutting fluid, optimal cutting parameters, hard coatings and heat treatment. Recently, another one of the methods commonly used to improve tool life is cryogenic treatment. This study was designed to evaluate the effects of different holding times of deep cryogenic treatment on tool Wear in turning of AISI 316 austenitic stainless steel. The cemented carbide inserts were cryogenically treated at −145 °C for 12, 24, 36, 48 and 60 h. Wear tests were conducted at four cutting speeds (100, 120, 140 and 160 m/min), a feed rate of 0.3 mm/rev and a 2.4 mm depth of cut under dry cutting conditions. The Wear test results showed that flank Wear and crater Wear were present in all combinations of the cutting parameters. However, Notch Wear appeared only at lower cutting speeds (100 and 120 m/min). In general, the best Wear resistance was obtained with cutting inserts cryogenically treated for 24 h. This case was attributed to the increased hardness and improved micro-structure of cemented carbide inserts. These improvements were confirmed through hardness, image processing, and XRD analyses.
D K Aspinwall - One of the best experts on this subject based on the ideXlab platform.
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tool life when high speed ball nose end milling inconel 718
Journal of Materials Processing Technology, 2001Co-Authors: Adrian Sharman, R C Dewes, D K AspinwallAbstract:Abstract Following a brief introduction of high speed machining (HSM) and the machinability of Inconel 718, the paper details experimental work using TiAlN and CrN coated tungsten carbide ball end mills, operating at cutting speeds up to 150 m/min. Inconel 718 is one of a family of nickel based superalloys that are used extensively for gas turbine applications requiring high temperature strength. It is an extremely difficult material to machine, not the least, because it maintains much of its strength at elevated temperatures (∼600°C), has low thermal conductivity and is prone to work harden during cutting. A 3 factor, full factorial cutting experiment at two levels is outlined with the workpiece inclined at 45° and 60° from the horizontal. The longest tool life was obtained when operating at 90 m/min cutting speed with TiAlN coated products. The choice of tool coating was the main factor influencing tool life. The primary tool Wear mechanism was adhesive Wear, which affected the CrN coating to a greater extent. This was accompanied by peeling off the coating to expose the K10 carbide substrate. Irrespective of the tool coating, Notches developed close to the depth of cut position. With the workpiece orientated at 60°C, greater tool deflection occurred which exacerbated Notch Wear and edge chipping.
T Sornakumar - One of the best experts on this subject based on the ideXlab platform.
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the effect of tool Wear on tool life of alumina based ceramic cutting tools while machining hardened martensitic stainless steel
Journal of Materials Processing Technology, 2006Co-Authors: Senthil A Kumar, Raja A Durai, T SornakumarAbstract:Abstract Tool life is an important parameter in evaluating the performance of the cutting tools. Tool Wear affects dimensions and surface quality of the workpiece and it is also one of the important criteria in determining tool life. When the tool reaches the tool Wear criterion, the cutting edge fails and cannot be used further. Machining studies have been conducted on hardened martensitic stainless steel (HRC 60) to analyse the effect of tool Wear on tool life of alumina ceramic cutting tools. The tool Wear such as flank Wear, crater Wear and Notch Wear are noted. These Wear data are used to develop mathematical tool Wear models using multiple regression analysis (MRA). Tool life of the alumina-based ceramic cutting tools is evaluated from these tool Wear models and the effect of various types of Wear on tool life is analysed while machining hardened martensitic stainless steel.
