Analysis of the Legal Risk in the Scientific Experiment of the Machining of Magnesium Alloys

Habrat, Dorota; Stadnicka, Dorota; Habrat, Witold

doi:10.1007/978-3-319-99353-9_45

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…It is generally claimed that machining temperature may be inductive to chip ignition and thus may cause machine tool damage and machine tool operator health hazard, and, as a consequence, pose a legal risk to the researcher in a scientific experiment [1]. The maximum temperature in milling magnesium alloys is achieved in a small chip formation area in the cutting zone and is directly related to chip formation time.…”

Section: Introductionmentioning

confidence: 99%

Safety in Rough Milling of Magnesium Alloys Using Tools with Variable Cutting Edge Geometry

Zagórski¹

2023

Adv. Sci. Technol. Res. J.

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This paper presents the results of a study investigating the problem of safety in dry milling magnesium alloy AZ91D. Selected indicators of safe machining were analyzed, including time to ignition, ignition temperature, chip mass and morphology. Experiments were performed using carbide end mills with a variable edge helix angle. It was observed that magnesium alloys could be dry milled without the risk of chip ignition. The milling process conducted with the axial depth of cut a p set to 6 mm was found to be optimum (a great amount of leading fraction A was produced). Unfortunately, however, some machining conditions proved to be inductive to the formation of chip powder known as magnesium dust. For most cases, chips obtained using the tool with λ s 50° had higher unit mass than those obtained with λ s 20°. Metallographic images of chips confirmed the safe range of the machining parameters employed (no partial melting or burn marks were observed). Determined on a specially designed test stand outside of the machine tool, time to ignition can be an effective parameter for performing simplified chip ignition simulations.

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Section: Introductionmentioning

confidence: 99%

Safety in Rough Milling of Magnesium Alloys Using Tools with Variable Cutting Edge Geometry

Zagórski¹

2023

Adv. Sci. Technol. Res. J.

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“…The authors concluded that the range 800-1200 W was the recommended laser power range for LAM of the specific alloy. However, it is important to note that machining of titanium alloys is also risky due to the possibility of ignition [13], especially in conditions of dry machining with an additional source of heat, as in the case of LAM. Therefore, it is important to specify process models for optimizing cutting parameters.…”

Section: Introductionmentioning

confidence: 99%

Thermo-mechanical aspects of cutting forces and tool wear in the laser-assisted turning of Ti-6Al-4V titanium alloy using AlTiN coated cutting tools

Habrat

Krupa

Markopoulos

et al. 2020

Int J Adv Manuf Technol

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Machining of hard-to-cut materials with conventional processes is still considered as a challenge, as the special properties of these materials often lead to rapid tool wear and reduced surface integrity. For that reason, it is preferable to combine conventional machining processes with other technologies in order to overcome the problems of machining these materials. In the present work, laser-assisted turning experiments on a Ti-6Al-4V workpiece were conducted using AlTiN coated cutting tools in order to investigate the effect of laser heating on cutting forces, cutting temperature, tool wear and microstructure alterations. Two series of experiments were performed under varying cutting speed, laser spot diameter and workpiece diameter values; the first series involved only laser heating of the workpiece and the second both laser heating and cutting. The findings revealed the effect of process parameters on cutting forces and temperature determining the importance of workpiece diameter size, indicated the formation of martensite phase at the top of the heat-affected zone of the workpiece and also showed that high temperatures can lead to intensive tool wear, instead of having a beneficial effect for the cutting tool. Finally, finite element (FE) simulations were carried out in order to study the time evolution of the temperature field and calculate the heating and cooling rates during the process. From the FE results, relatively high heating and cooling rates were observed for smaller workpiece diameters and lower cutting speed, whereas the high magnitude of these rates justified the creation of the martensite phase through a diffusionless transformation.

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Analysis of the Legal Risk in the Scientific Experiment of the Machining of Magnesium Alloys

Cited by 2 publications

References 12 publications

Safety in Rough Milling of Magnesium Alloys Using Tools with Variable Cutting Edge Geometry

Safety in Rough Milling of Magnesium Alloys Using Tools with Variable Cutting Edge Geometry

Thermo-mechanical aspects of cutting forces and tool wear in the laser-assisted turning of Ti-6Al-4V titanium alloy using AlTiN coated cutting tools

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