Surface crack density and recast layer thickness analysis in WEDM process through response surface methodology

2016 ◽  
Vol 20 (2) ◽  
pp. 201-230 ◽  
Author(s):  
Anish Kumar ◽  
Vinod Kumar ◽  
Jatinder Kumar
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Layer Thickness ◽  
Surface Crack ◽  
Crack Density ◽  
Recast Layer ◽  
Surface Crack Density ◽  
Recast Layer Thickness ◽  
Wedm Process

A Study on White Layer Thickness and Surface Crack Density in Rotary EDM of RENE80 Nickel Superalloy

2014 ◽  
Vol 592-594 ◽  
pp. 23-27
Author(s):  
U. Shrinivas Balraj ◽  
P. Anitha ◽  
A. Gopalakrishna
Keyword(s):  
Layer Thickness ◽  
Process Parameters ◽  
Surface Crack ◽  
White Layer ◽  
Crack Density ◽  
Peak Current ◽  
White Layer Thickness ◽  
Surface Crack Density ◽  
Pulse On Time ◽  
Pulse Off Time

In this paper, rotary electrical discharge machining of RENE 80 nickel super alloy is carried out to study the effect of process parameters like peak current, pulse on time, pulse off time and rotational speed of electrode on surface integrity characteristics like white layer thickness and surface crack density. The number of experiments, optimum levels of the parameters and their effects are studied using Taguchi method. The significant process parameters are identified using analysis of variance. It is found that the responses are affected mainly by peak current and pulse on time. The experimental results reveal that white layer thickness increases with increase of peak current and pulse on time whereas the surface crack density decreases with increase of peak current and pulse on time.

The Effects of Pulse on Time and Arc on Time on Surface Quality in Wire-EDM of ASSAB XW-42 and ASSAB 8407 2M Tool Steels

2016 ◽  
Vol 836 ◽  
pp. 173-178 ◽  
Author(s):  
Hasriadi ◽  
Bobby Oedy Pramoedyo Soepangkat ◽  
H. Subiyanto
Keyword(s):  
Surface Quality ◽  
Electrical Discharge Machining ◽  
Crack Density ◽  
Recast Layer ◽  
Work Piece ◽  
Tool Steels ◽  
Recast Layer Thickness ◽  
Pulse On Time ◽  
Wedm Process

In this study, the effects of cutting parameter on surface quality was investigated experimentally in wire electrical discharge machining (WEDM) process of ASSAB XW-42 and ASSAB 8407 2M tool steels. The surface quality of WEDMachined (WEDMed) was usually characterized by its roughness, recast layer and cracks. The experiments were conducted under different setting of pulse on time and arc on time on. It can be concluded that surface roughness, recast layer thickness and density of microcracks increased proportionally with pulse on time and arc on time. Thin recast layer and low crack density in the surface of ASSAB XW-42 tool steel was due to the low thermal conductivity of work piece material.

scholarly journals Process Parameter Optimization in Fused Deposition Modeling (FDM) Using Response Surface Methodology (RSM)

2020 ◽  
Author(s):  
Muhammad Salman Mustafa ◽  
Muhammad Qasim Zafar ◽  
Muhammad Arslan Muneer ◽  
Muhammad Arif ◽  
Farrukh Arsalan Siddiqui ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Response Surface Methodology ◽  
Impact Strength ◽  
Response Surface ◽  
Layer Thickness ◽  
Fused Deposition Modeling ◽  
Experimental Results ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Printing Parameters

Abstract Fused Deposition Modeling (FDM) is a widely adopted additive manufacturing process to produce complex 3D structures and it is typically used in the fabrication of biodegradable materials e.g. PLA/PHA for biomedical applications. However, FDM as a fabrication process for such material needs to be optimized to enhance mechanical properties. In this study, dogbone and notched samples are printed with the FDM process to determine optimum values of printing parameters for superior mechanical properties. The effect of layer thickness, infill density, and print bed temperature on mechanical properties is investigated by applying response surface methodology (RSM). Optimum printing parameters are identified for tensile and impact strength and an empirical relation has been formulated with response surface methodology (RSM). Furthermore, the analysis of variance (ANOVA) was performed on the experimental results to determine the influence of the process parameters and their interactions. ANOVA results demonstrate that 44.7% infill density, 0.44 mm layer thickness, and 20C° printing temperatures are the optimum values of printing parameters owing to improved tensile and impact strength respectively. The experimental results were found in strong agreement with the predicted theoretical results.

Effect of recast layer thickness on the mechanical characteristics of INCONEL 718 machined by spark EDM process

2018 ◽  
Vol 5 (2) ◽  
pp. 8249-8255
Author(s):  
M. Anthony Xavior ◽  
P. Ashwath ◽  
Harun Ali ◽  
Atef Moideen ◽  
Pansura Banu ◽  
...  
Keyword(s):  
Layer Thickness ◽  
Inconel 718 ◽  
Mechanical Characteristics ◽  
Recast Layer ◽  
Recast Layer Thickness ◽  
Edm Process

scholarly journals Optimization of Soybean Meal Fermentation for Aqua-Feed with Bacillus subtilis natto Using the Response Surface Methodology

Fermentation ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 306
Author(s):  
Yukun Zhang ◽  
Manabu Ishikawa ◽  
Shunsuke Koshio ◽  
Saichiro Yokoyama ◽  
Serge Dossou ◽  
...  
Keyword(s):  
Amino Acids ◽  
Response Surface Methodology ◽  
Bacillus Subtilis ◽  
Response Surface ◽  
Layer Thickness ◽  
Soybean Meal ◽  
Essential Amino Acids ◽  
Total Phenolic ◽  
Bacillus Subtilis Natto ◽  
Substrate Ratio

This study aimed to improve the nutritional value of soybean meal (SBM) by solid-state fermentation (SSF) using Bacillus subtilis natto (B. s. natto) to overcome the limitations of SBM usage in aquafeed. The response surface methodology (RSM) was employed to explore the relationships of fermentation conditions, such as temperature, time, water-substrate ratio, and layer thickness, on the degree of protein hydrolysis (DH) and the crude protein (CP) content. The optimum conditions for achieving the higher DH (15.96%) and CP (55.76%) were 43.82 °C, 62.32 h, 1.08 of water-substrate ratio, and a layer thickness of 2.02 cm. CP and DH in the fermented soybean meal (FSM) increased by 9.8% and 177.1%, respectively, and crude fiber decreased by 14.1% compared to SBM. The protein dispersibility index (PDI) decreased by 29.8%, while KOH protein solubility (KPS) was significantly increased by 17.4%. Flavonoids and total phenolic acid content in FSM were increased by 231.0% and 309.4%, respectively. Neutral protease activity (NPA) also reached a high level (1723.6 U g−1). Total essential amino acids (EAA) in FSM increased by 12.2%, higher than the 10.8% increase of total non-essential amino acids (NEAA), while the total free amino acids content was 12.76 times higher than that of SBM. Major anti-nutritional factors in SBM were significantly reduced during the process, and almost all SBM protein macromolecules were decomposed. Together with the cost-effectiveness of SSF, B. s. natto-fermented SBM products have great potential to improve the plant composition and replace high-cost ingredients in aquafeed, contributing to food security and environmental sustainability.

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