The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Ulas Caydas - One of the best experts on this subject based on the ideXlab platform.
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modeling and analysis of Electrode Wear and white layer thickness in die sinking edm process through response surface methodology
The International Journal of Advanced Manufacturing Technology, 2008Co-Authors: Ulas Caydas, Ahmet HascalikAbstract:In this study, an attempt has been made to model Electrode Wear (EW) and recast layer thickness (WLT) through response surface methodology (RSM) in a die-sinking EDM process. A central composite rotatable design (CCRD) involving three variables with five levels has been employed to establish a mathematical model between input parameters and responses. Pulse on-time, pulse off-time and pulse current were changed during the tests based on the CCRD. The results of analysis of variance (ANOVA) indicated that the proposed mathematical models obtained can adequately describe the performances within the limits of factors being studied. The experimental and predicted values were in a good agreement.
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electrical discharge machining of titanium alloy ti 6al 4v
Applied Surface Science, 2007Co-Authors: Ahmet Hascalik, Ulas CaydasAbstract:Abstract In this study, the electrical discharge machining (EDM) of titanium alloy (Ti–6Al–4V) with different Electrode materials namely, graphite, electrolytic copper and aluminium and process parameters such as, pulse current and pulse duration were performed to explore the influence of EDM parameters on various aspects of the surface integrity of Ti6Al4V. Scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectrograph (EDS) and hardness analysis were performed. The experimental results reveal that the value of material removal rate, surface roughness, Electrode Wear and average white layer thickness are tendency of increase with increasing current density and pulse duration. However, extremely long-pulse durations such as 200 μs led to decrease MRR and surface roughness. Furthermore, the surface hardness is increasing due to the Ti 24 C 15 carbides formed on the surface and obvious cracks are always evident in re-solidified layer when machining copper Electrode. The surface crack densities and critical crack lines were determined for the tested material. The graphite Electrode is beneficial on material removal rate, Electrode Wear and surface crack density but relatively poorer surface finish.
Yong Song Chang - One of the best experts on this subject based on the ideXlab platform.
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machining characteristics of titanium alloy ti 6al 4v using a combination process of edm with usm
Journal of Materials Processing Technology, 2000Co-Authors: Yancherng Lin, Biinghwa Yan, Yong Song ChangAbstract:Abstract This paper presents an experimental investigation of the machining characteristics of titanium alloy (Ti–6Al–4V) using a combination process of electro-discharge machining (EDM) with ultrasonic machining (USM). The EDM and USM machining mechanisms were integrated to improve the machining efficiency and accuracy. During the experiments, parameters such as dielectric type, abrasive size, concentration of abrasive in the dielectric fluid, discharge peak current and pulse duration were changed to explore their effect on the material removal rate (MRR), Electrode Wear rate (EWR), relative Electrode Wear ratio (REWR), surface roughness and thickness of the recast layer. From the experimental results, we conclude that this combination EDM/USM process can increase the MRR and decrease the thickness of the recast layer. In addition, the discharge waveform analysis shows that the combination EDM/USM process can dramatically reduce abnormal discharge, thus improving the discharge efficiency.
Ahmet Hascalik - One of the best experts on this subject based on the ideXlab platform.
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modeling and analysis of Electrode Wear and white layer thickness in die sinking edm process through response surface methodology
The International Journal of Advanced Manufacturing Technology, 2008Co-Authors: Ulas Caydas, Ahmet HascalikAbstract:In this study, an attempt has been made to model Electrode Wear (EW) and recast layer thickness (WLT) through response surface methodology (RSM) in a die-sinking EDM process. A central composite rotatable design (CCRD) involving three variables with five levels has been employed to establish a mathematical model between input parameters and responses. Pulse on-time, pulse off-time and pulse current were changed during the tests based on the CCRD. The results of analysis of variance (ANOVA) indicated that the proposed mathematical models obtained can adequately describe the performances within the limits of factors being studied. The experimental and predicted values were in a good agreement.
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electrical discharge machining of titanium alloy ti 6al 4v
Applied Surface Science, 2007Co-Authors: Ahmet Hascalik, Ulas CaydasAbstract:Abstract In this study, the electrical discharge machining (EDM) of titanium alloy (Ti–6Al–4V) with different Electrode materials namely, graphite, electrolytic copper and aluminium and process parameters such as, pulse current and pulse duration were performed to explore the influence of EDM parameters on various aspects of the surface integrity of Ti6Al4V. Scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectrograph (EDS) and hardness analysis were performed. The experimental results reveal that the value of material removal rate, surface roughness, Electrode Wear and average white layer thickness are tendency of increase with increasing current density and pulse duration. However, extremely long-pulse durations such as 200 μs led to decrease MRR and surface roughness. Furthermore, the surface hardness is increasing due to the Ti 24 C 15 carbides formed on the surface and obvious cracks are always evident in re-solidified layer when machining copper Electrode. The surface crack densities and critical crack lines were determined for the tested material. The graphite Electrode is beneficial on material removal rate, Electrode Wear and surface crack density but relatively poorer surface finish.
Biinghwa Yan - One of the best experts on this subject based on the ideXlab platform.
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machining characteristics of titanium alloy ti 6al 4v using a combination process of edm with usm
Journal of Materials Processing Technology, 2000Co-Authors: Yancherng Lin, Biinghwa Yan, Yong Song ChangAbstract:Abstract This paper presents an experimental investigation of the machining characteristics of titanium alloy (Ti–6Al–4V) using a combination process of electro-discharge machining (EDM) with ultrasonic machining (USM). The EDM and USM machining mechanisms were integrated to improve the machining efficiency and accuracy. During the experiments, parameters such as dielectric type, abrasive size, concentration of abrasive in the dielectric fluid, discharge peak current and pulse duration were changed to explore their effect on the material removal rate (MRR), Electrode Wear rate (EWR), relative Electrode Wear ratio (REWR), surface roughness and thickness of the recast layer. From the experimental results, we conclude that this combination EDM/USM process can increase the MRR and decrease the thickness of the recast layer. In addition, the discharge waveform analysis shows that the combination EDM/USM process can dramatically reduce abnormal discharge, thus improving the discharge efficiency.
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optimization of the electrical discharge machining process based on the taguchi method with fuzzy logics
Journal of Materials Processing Technology, 2000Co-Authors: J L Lin, Kuanwen Wang, Biinghwa Yan, Y. S. TarngAbstract:Abstract In this paper, the application of the Taguchi method with fuzzy logic for optimizing the electrical discharge machining process with multiple performance characteristics has been reported. A multi-response performance index is used to solve the electrical discharge machining process with multiple performance characteristics. The machining parameters (the workpiece polarity, pulse-on time, duty factor, open discharge voltage, discharge current and dielectric fluid) are optimized with considerations of the multiple performance characteristics (Electrode Wear ratio and material removal rate). Experimental results are presented to demonstrate the effectiveness of this approach.
Yancherng Lin - One of the best experts on this subject based on the ideXlab platform.
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machining characteristics and optimization of machining parameters of skh 57 high speed steel using electrical discharge machining based on taguchi method
Materials and Manufacturing Processes, 2006Co-Authors: Yancherng Lin, Chaohsu Cheng, Bolin Su, Lihren HwangAbstract:The effects of the machining parameters in electrical-discharge machining (EDM) on the machining characteristics of SKH 57 high-speed steel were investigated. A well-designed experimental scheme was used to reduce the total number of experiments. Parts of the experiment were conducted with the L18 orthogonal array based on the Taguchi method. Moreover, the signal-to-noise ratios associated with the observed values in the experiments were determined by ANOVA and F-test. The significant parameters that critically influenced the machining characteristics were examined, and the optimal combination levels of machining parameters for material removal rate, Electrode Wear rate, and surface roughness were determined.
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machining characteristics of titanium alloy ti 6al 4v using a combination process of edm with usm
Journal of Materials Processing Technology, 2000Co-Authors: Yancherng Lin, Biinghwa Yan, Yong Song ChangAbstract:Abstract This paper presents an experimental investigation of the machining characteristics of titanium alloy (Ti–6Al–4V) using a combination process of electro-discharge machining (EDM) with ultrasonic machining (USM). The EDM and USM machining mechanisms were integrated to improve the machining efficiency and accuracy. During the experiments, parameters such as dielectric type, abrasive size, concentration of abrasive in the dielectric fluid, discharge peak current and pulse duration were changed to explore their effect on the material removal rate (MRR), Electrode Wear rate (EWR), relative Electrode Wear ratio (REWR), surface roughness and thickness of the recast layer. From the experimental results, we conclude that this combination EDM/USM process can increase the MRR and decrease the thickness of the recast layer. In addition, the discharge waveform analysis shows that the combination EDM/USM process can dramatically reduce abnormal discharge, thus improving the discharge efficiency.