Intrusion features of a high-speed striker of a porous tungsten-based alloy with a strengthening filler in a steel barrier

Ищенко, А. Н.; Afanas’eva, S. A.; Белов, Н. Н.; Буркин, В. В.; Rogaev, K. S.; Sammel, A. Yu.; Skosyrskii, A. B.; Табаченко, А. Н.; Yugov, N. T.

doi:10.1134/s1063785017090024

Cited by 11 publications

(2 citation statements)

References 4 publications

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“…The developed in-situ monitoring system was verified on hard and wear-resistant alloys capable of maintaining their properties at temperatures of 900–1150 °C. The 12 mm long workpieces of hard alloys of VK6O (analogue of M05 by ISO, Table 1) [95, 96, 97] and T15K6 (analogue of P10 by ISO, Table 2) grades [98, 99, 100, 101, 102] were processed on an industrial 4-axis EDM machine AgieCharmilles CUT 1000 (GF Machining Solutions, Bern, Switzerland) using a 0.25 mm diameter brass wire with deionised water as medium. To induce wire tool breakage, the pulse frequencies were changed manually and gradually during processing up to the moment of wire breakage.…”

Section: Methodsmentioning

confidence: 99%

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Grigoriev

Kozochkin

Porvatov

et al. 2019

Heliyon

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The productivity of electrical discharge machining (EDM) is relatively low owing to the natural laws of electrical erosion. Precise EDM demands uninterrupted control of the discharge gap and adjustment of process parameters. It is particularly critical for processing large workpieces with complex linear surfaces and for materials with threshold conductivities such as the new advanced ceramic nanocomposites Al2O3+TiC and Al2O3+SiCw+TiC(30–40%). In these cases, adequate flushing of erosion products is hampered by the geometry of the working space or by the small value of the required discharge gap, which does not exceed 2.2–2.5 μm. The methods of adaptive control in modern computer numerical control systems of EDM equipment based on measuring the electrical parameters in the working zone have been shown to be ineffective in the cases described above. This study aims to investigate the natural phenomena of material sublimation under discharge pulses for conductive ceramics and nanocomposites. The measured conductivities of the samples are higher than the percolation threshold. However, the question of machinability remains open owing to detected processing interruptions and poor quality of machined surfaces. New knowledge on EDM of conductive ceramics and nanocomposites can improve the final quality of the machined surfaces and productivity of the method by the introduction of advanced monitoring and control methods based on acoustic emissions. The manuscript presents an up-to-date overview and current state of the research on the subject area. The obtained morphology of the samples and discussion of the findings complete the experimental part of the study. The scientific basis for a new type of adaptive control system is provided. This can improve the effectiveness of parameter control for machining conductive ceramics and nanocomposites and contribute to an increase in the EDM performance for the most critical cases.

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Section: Methodsmentioning

confidence: 99%

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Grigoriev

Kozochkin

Porvatov

et al. 2019

Heliyon

View full text Add to dashboard Cite

show abstract

“…Composite materials for explosively formed projectiles and shaped charge jets were developed in the 1980s. Recently they have been replaced by porous analogues [1,2]. In the past few decades, along with intelligent devices and technologies, functional or smart materials have occupied a prominent place in modern scientific and technological progress.…”

Section: Introductionmentioning

confidence: 99%