Onset of the degradation of CVD α-Al2O3 coating during turning of Ca-treated steels

Bjerke, Axel; Hrechuk, Andrii; Lenrick, Filip; M’Saoubi, Rachid; Larsson, Henrik; Markström, Andreas; Björk, Thomas; Norgren, Susanne; Ståhl, Jan Eric; Bushlya, Volodymyr

doi:10.1016/j.wear.2021.203785

Cited by 14 publications

(2 citation statements)

References 22 publications

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“…Chemical reactions between the coating and the oxide inclusions are also reported in some cases. These reactions are believed to increase the rate of tool wear [37,38]. These factors should be considered when comparing the influence of oxide inclusions on machinability of AM materials with their conventionally manufactured counterparts.…”

Section: Machinabilitydefinition and Assessment Methodsmentioning

confidence: 99%

Post-processing of additively manufactured metallic alloys – A review

Malakizadi

Mallipeddi

Dadbakhsh

et al. 2022

International Journal of Machine Tools and Manufacture

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Section: Machinabilitydefinition and Assessment Methodsmentioning

confidence: 99%

Post-processing of additively manufactured metallic alloys – A review

Malakizadi

Mallipeddi

Dadbakhsh

et al. 2022

International Journal of Machine Tools and Manufacture

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“…Yang et al [102] investigated the effect of different pure-iron grain sizes on the cutting temperature. Bjerke et al [103] employed the IR-camera technique to monitor the tool temperature distribution during an investigation into the influence of oxygen on the degradation of tool coatings. Hao et al [104] investigated the effect of a TiAlN-coated tool on the cutting temperature during the turning of H13 hardened steel.…”

Section: Infrared Camerasmentioning

confidence: 99%

A Comparative Review of Thermocouple and Infrared Radiation Temperature Measurement Methods during the Machining of Metals

Leonidas

Ayvar-Soberanis

Laalej

et al. 2022

Sensors

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During the machining process, substantial thermal loads are generated due to tribological factors and plastic deformation. The increase in temperature during the cutting process can lead to accelerated tool wear, reducing the tool’s lifespan; the degradation of machining accuracy in the form of dimensional inaccuracies; and thermally induced defects affecting the metallurgical properties of the machined component. These effects can lead to a significant increase in operational costs and waste which deviate from the sustainability goals of Industry 4.0. Temperature is an important machining response; however, it is one of the most difficult factors to monitor, especially in high-speed machining applications such as drilling and milling, because of the high rotational speeds of the cutting tool and the aggressive machining environments. In this article, thermocouple and infrared radiation temperature measurement methods used by researchers to monitor temperature during turning, drilling and milling operations are reviewed. The major merits and limitations of each temperature measurement methodology are discussed and evaluated. Thermocouples offer a relatively inexpensive solution; however, they are prone to calibration drifts and their response times are insufficient to capture rapid temperature changes in high-speed operations. Fibre optic infrared thermometers have very fast response times; however, they can be relatively expensive and require a more robust implementation. It was found that no one temperature measurement methodology is ideal for all machining operations. The most suitable temperature measurement method can be selected by individual researchers based upon their experimental requirements using critical criteria, which include the expected temperature range, the sensor sensitivity to noise, responsiveness and cost.

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