Analysis of the electrical discharge machining (EDM) performance on Ramor 550 armor steel

Abstract

This study investigated the electrical discharge machining (EDM) performance of Ramor 500 Armor steel, a material used in the defense industry for armor production. In addition, the surface quality and amount of material wear of the treated surfaces were determined using different electrical discharge processing parameters for a copper electrode including pulse on-time (99, 150, 225, 300, 351 μs), pulse off-time (10, 15, 23, 30, 35 μs), and discharge current (3, 4, 6, 8, 9 A), at a constant pressure of 1 mm depth of cut. As a result of the experiments, the values related to the material removal rate (MRR) and the surface roughness (Ra) were obtained and the findings analyzed via response surface methodology (RSM). The increase in amperage and pulse on time resulted in an increase in Ra and MRR values. The minimum and maximum Ra and MRR values emerged at currents of 3 and 9 A, respectively. In the experiments performed applying currents of between 3 and 9 A, the white layer widths were measured as 0.0474 mm and 0.0915 mm, respectively. The statistical test results showed that the most effective processing parameters for the MRR were the discharge current amperage (49.01 %) and the pulse off-time (16.51 %), whereas the most effective parameter for the Ra value was the discharge current amperage (79.07 %).

Evaluation of the machinability performance of PH 13-8 Mo maraging steel used in the aerospace industry

“…It was observed that the experimental and estimated results given in Supplemental Figure S6 were compatible with one another and the confirmation results were within the error rate limits. 30 According to the optimization results, Fc, Ra, Pc, and SCE data calculated with the estimated equations developed with experimental data provided high-accuracy results.…”

“…If the P value in Table 4 is less than 0.05, it is accepted that the effect of the cutting parameters on the output parameters is statistically significant. 30 The effects of cutting parameters used in turning experiments on Fc, Ra, Pc, and SCE are presented in percentage in the pie chart in Supplemental Figure S4. The most effective cutting parameter on Fc, Ra, Pc, and SCE was feed rate with 85.57%, 84.93%, 71.10%, and 60%, respectively.…”

“…If the P value in Table 4 is less than 0.05, it is accepted that the effect of the cutting parameters on the output parameters is statistically significant. 30…”

A detailed investigation of the temperature-controlled fluidized bed solar dryer: A numerical, experimental, and modeling study

“…In this way, the RSM model reports the impacts of input parameters on output parameters with mathematical formulations and consequently aims to present easily viable equations, which lead to saving time and minimizing the cost of the experimental studies. Some researchers applied the RSM models in optimizing and predicting their experimental results and proposed the beneficial predictive mathematical models for the relevant outputs to the literature for future works [39,40]. In line with this, it is possible to find papers using the RSM models in the food drying applications [41,42].…”

Sleipner Soğuk İş Takım Çeliğinin Elektro-Erozyon Tezgahında Bakır Krom Zirkonyum Alaşımı Elektrot ile İşlenmesinde İşleme Parametrelerinin Kerf ve Yüzey Pürüzlülüğü Üzerine Etkisinin İncelenmesi

“…Şekil 7. Test sonuçlarının grafiksel gösterimiLiteratürde bulunan benzer çalışmalar incelendiğinde boşalım akımının yüzey pürüzlülüğüne etki eden en baskın parametre olduğu, savunma sanayisinde kullanılan Ramor 500 zırh çeliğinin EEİ yöntemiyle işlenmesinde Ra yüzey pürüzlülük değerine etkisinin % 79,07 olduğu belirtilmiştir(Nas, 2020). Başka bir çalışmada, matris malzemesi olarak AA7075 alaşımı içeren metal matris kompozit malzemelerin işlenmesinde boşalım akımının yüzey pürüzlülüğüne etkisi % 48,77 olarak bildirilmiştir(Uğur ve ark., 2020).…”