E. Bayraktar

Experimental Comparison of the Microstructure and Surface Roughness in CO 2 Laser Cutting of the Titanium Alloy Ti–6Al–4V and the Pure Titanium Ti

Titanium and its alloys have over the years proven themselves to be technically superior and cost effective materials for a wide range of applications spanning the industries of aerospace, industrial, marine, and even commercial products. In this paper, the surface integrity of titanium alloys Ti-6Al-4V and pure titanium Ti, cut with high power CO2 laser is determined and the results are presented and discussed. The aim of this experimental investigation is to compare the microstructure and the cut surface quality of both titanium based on the variation of three different cutting parameters namely, laser power (Pu), cutting speed (V) and gas pressure (p).

Process Reliability of Abrasive Water Jet to Cut Shapes of the Titanium Alloy Ti-6Al-4V

Titanium alloys have been widely used in industries, especially aerospace, energy and medical industries, due to their good mechanical and chemical properties. However, titanium alloys are typically difficult-to-cut materials. That is why, in industries we are using many process to cut this alloys. In fact, several studies have made a comparisons between the various machining processes currently used in industries to cut Titanium alloys.

Recycled Ti-17 Based Composite Design; Optimization Process Parameters in Wire Cut Electrical Discharge Machining (WEDM)

This work present a comprehensive study on the effect and optimization of machining parameters on the kerf (cutting width) and material removal rate (MRR) in wire electrical discharge machining (WEDM) process by using the response surface methodology (RSM) and Taguchi method. The experimental studies were conducted under varying parameters. The main input parameters on this model are the cutting parameters such us pulse on time (Ton), servo voltage (U), Speed of advance or feed rate (S) and injection pressure or flushing pressure (P). Recycled Titanium based composite (an alloy Ti17) was used for machining operations and the combined effects of cutting parameters on the material removal MRR rate and kerf were investigated while using the analysis of variance ANOVA. Mathematical models were used for the objective of minimum kerf and maximum MRR, Cut edge surface analysis was carried out using an optic microscope and Scanning Electron Microscope (SEM) to evaluate the kerf.

Optimization of Surface Integrity of Titanium-Aluminum Intermetallic Composite Machined by Wire EDM

This study investigate the influence of the machining parameters on Ti-Al intermetallic composite based using a wire electrical discharge machining. This process is typically used for very hard material, which are hard to machine using a more traditional process. The aim of the work is to optimize the integrity of surface of Ti-Al intermetallic composite machined by WEDM. The first step is defined the machining parameters of the process: Start up voltage U, Pulse on time Ton or T, advanced speed S and flushing pressure P (pressure of injection of dielectric) are chosen to determine their effects on surface roughness Ra. The second step is using integrated method, which mixed Taguchi method and response surface methodology RSM, the RSM model was developed as a tool to predict the integrity of surface of Ti-Al intermetallic composite machined by WEDM. The significance of the machining parameters was obtained using analysis of variance (ANOVA) based on S/N ratio, which show that flushing pressure P, Pulse on Time T and Voltage U were the most significant parameters. Microstructure of surface and subsurface, cracks, craters, and debris and roughness surface of the samples machined at the different condition has been realized by scanning electron microscopy (SEM), and 3D-Surfscan. The integrate method of Taguchi and RSM was validated by conducting validation experiment to ensure that it can work accurately as a prediction tool.

A Study of the Surface Integrity of Titanium Alloy Ti-6Al-4V in the Abrasive Water Jet Machining Process

The abrasive water jet (AWJ) cutting technique is one the most rapidly improving technological methods of cutting materials. In this cutting technique, a thin, high velocity water jet accelerates abrasive particles that are directed through an abrasive water jet nozzle at the material to be cut.

Optimization of Kerf Quality During CO 2 Laser Cutting of Titanium Alloy Sheet Ti-6Al-4V and Pure Titanium Ti

CO2 laser cutting is an advanced processing technology, which can, according to the computer-aided design graphics, cut a variety of shapes in the surfaces of many metallic sheets. Laser cutting of various materials including the Titanium alloy Ti-6Al-4V and pure Titanium Ti is carried out to assess the kerf width size variation along the cut section. This work aims to analyze the effect of laser power, cutting speed, and gas pressure on the kerf quality of Ti-6Al-4V alloy and Ti with CO2 laser cutting process. The kerf width size is formulated and predicted using the lump parameter analysis and it is measured from the experiments. The influence of laser output power Pu and laser cutting speed V and pressure nitrogen assisting gas p on the kerf width size variation is analyzed using the analytical tools including scanning electron and optical microscopes. The quality of laser cut kerf mainly depends on appropriate selection of process parameters. Uniform kerf with minimum kerf width is always demand. It has been found that the kerf width during CO2 laser process is not uniform along the length of cut. A considerable improvement in kerf quality has been achieved.

Studying Effect of CO 2 Laser Cutting Parameters of Titanium Alloy on Heat Affected Zone and Kerf Width Using the Taguchi Method

In laser cutting process, the cut quality is of great importance. The Heat Affected Zone (HAZ), the kerf width (Kw) of laser cut and quality of the cut edges are affected by cutting parameters as well as the work-piece material. In this paper CO2 laser cutting of 3 mm thick of Titanium alloy sheet grade 5 Ti-6Al-4 V is investigated. The main objectives of the present work are firstly focused on evaluating the effect of laser power (Pu), cutting speed (V) and gas pressure (p) on Heat Affected Zone and Kerf width quality. Secondly, the relationship between cutting parameters and laser process output variables are analyzed and optimized using the Taguchi method. Results indicate that the thickness of the Heat affected Zone increases with the evolution of laser power and decreases with the increase of cutting speed, and the optimum cutting condition was found to be 1 kW for the laser power, 2400 mm/min for the cutting speed and 2 bars for gas pressure. Also, it is underlined that the kerf width is mainly influenced by laser power and cutting speed.