Measurement problems in technological shaping processes

Grigoriev, S. N.; Teleshevskii, V. I.

doi:10.1007/s11018-011-9798-5

Cited by 92 publications

(18 citation statements)

References 1 publication

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“…Due to this reason it is necessary to install the means of optical monitoring system of SLM-processing. The system Article published by EDP Sciences allows collecting of enough data for diagnosis of negative effects and also an explanation of some processes [11]. Now there is no melting process control system at industrial machines [12].…”

Section: Introductionmentioning

confidence: 99%

Laser beam profiling: experimental study of its influence on single-track formation by selective laser melting

Zhirnov

Podrabinnik

Okunkova

et al. 2015

Mechanics & Industry

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-In the article the experimental study of influences of laser beam profiling on the microstructure of the material obtained by selective laser melting is presented. Microstructure was researched by the example of single-track formation. For these needs the optical and video-monitoring stand was constructed. The defects of single-track formation were obtained by microscopy and video monitoring. The technological gaps for each laser beam profile give the possibility to use higher power for laser systems in the future with the purpose to improve productivity of SLM processing.

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Section: Introductionmentioning

confidence: 99%

Laser beam profiling: experimental study of its influence on single-track formation by selective laser melting

Zhirnov

Podrabinnik

Okunkova

et al. 2015

Mechanics & Industry

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“…The electrode tool has a negative bias, and a workpiece is positive. Electrical discharge machining was accomplished with flushing to provide better performance and machining stability [24]. The path offset was not taken into account during machining [1,21].…”

Section: Equipment and Machining Factorsmentioning

confidence: 99%

Sub-Microstructure of Surface and Subsurface Layers after Electrical Discharge Machining Structural Materials in Water

Grigoriev

Волосова

Okunkova

et al. 2021

Metals

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The material removal mechanism, submicrostructure of surface and subsurface layers, nanotransformations occurred in surface and subsurface layers during electrical discharge machining two structural materials such as anti-corrosion X10CrNiTi18-10 (12kH18N10T) steel of austenite class and 2024 (D16) duralumin in a deionized water medium were researched. The machining was conducted using a brass tool of 0.25 mm in diameter. The measured discharge gap is 45–60 µm for X10CrNiTi18-10 (12kH18N10T) steel and 105–120 µm for 2024 (D16) duralumin. Surface roughness parameters are arithmetic mean deviation (Ra) of 4.61 µm, 10-point height (Rz) of 28.73 µm, maximum peak-to-valley height (Rtm) of 29.50 µm, mean spacing between peaks (Sm) of 18.0 µm for steel; Ra of 5.41 µm, Rz of 35.29 µm, Rtm of 43.17 µm, Sm of 30.0 µm for duralumin. The recast layer with adsorbed components of the wire tool electrode and carbides was observed up to the depth of 4–6 µm for steel and 2.5–4 µm for duralumin. The Levenberg–Marquardt algorithm was used to mathematically interpolate the dependence of the interelectrode gap on the electrical resistance of the material. The observed microstructures provide grounding on the nature of electrical wear and nanomodification of the obtained surfaces.

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“…The tool electrode had a negative bias, and a workpiece was positive. Flushing was used during experiments to provide better performance and machining stability [39]. The path offset was not taken into account during machining [1,37].…”

Section: Equipment and Machining Factorsmentioning

confidence: 99%

Elemental and Thermochemical Analyses of Materials after Electrical Discharge Machining in Water: Focus on Ni and Zn

et al. 2021

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The mechanism of the material destruction under discharge pulses and material removal mechanism based on the thermochemical nature of the electrical erosion during electrical discharge machining of conductive materials were researched. The experiments were conducted for two structural materials used in the aerospace industry, namely austenite anticorrosion X10CrNiTi18-10 (12kH18N10T) steel and 2024 (D16) duralumin, machined by a brass tool of 0.25 mm in diameter in a deionized water medium. The optimized wire electrical discharge machining factors, measured discharge gaps (recommended offset is 170–175 µm and 195–199 µm, respectively), X-ray photoelectron spectroscopy for both types of materials are reported. Elemental analysis showed the presence of metallic Zn, CuO, iron oxides, chromium oxides, and 58.07% carbides (precipitation and normal atmospheric contamination) for steel and the presence of metallic Zn, CuO, ZnO, aluminum oxide, and 40.37% carbides (contamination) for duralumin. For the first time, calculating the thermochemistry parameters for reactions of Zn(OH)2, ZnO, and NiO formation was produced. The ability of Ni of chrome–nickel steel to interact with Zn of brass electrode was thermochemically proved. The standard enthalpy of the Ni5Zn21 intermetallic compound formation (erosion dust) ΔH0298 is −225.96 kJ/mol; the entropy of the crystalline phase Scint is 424.64 J/(mol·K).

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Measurement problems in technological shaping processes

Cited by 92 publications

References 1 publication

Laser beam profiling: experimental study of its influence on single-track formation by selective laser melting

Laser beam profiling: experimental study of its influence on single-track formation by selective laser melting

Sub-Microstructure of Surface and Subsurface Layers after Electrical Discharge Machining Structural Materials in Water

Elemental and Thermochemical Analyses of Materials after Electrical Discharge Machining in Water: Focus on Ni and Zn

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