Search results for "Inconel"
showing 4 items of 4 documents
Cutting Fluids
2008
This chapter provides comprehensive knowledge regarding cutting fluids (CFs), their classifications and basic categories, including non-water-miscible, water-miscible and water-based CFs. Main properties and application areas of these three CFs are characterized and specified. Such effects as cooling, lubricating and processing (i.e., the influence on the behaviour of the cutting process) resulting from supplying CFs are outlined. The strategies of delivering CFs to the cutting zone, including flooding, external and internal supply of pressured CFs, along with minimum-quantity lubrication techniques as well as cryogenically cooled gases (CO2 snow and liquid nitrogen (LN2)) are described. So…
Inspection of additive-manufactured layered components
2015
Laser powder deposition (LPD) is a rapid additive manufacturing process to produce, layer upon layer, 3D geometries or to repair high-value components. Currently there is no nondestructive technique that can guarantee absence of flaws in LPD products during manufacturing. In this paper a laser ultrasonic technique for in-line inspection of LPD components is proposed. Reference samples were manufactured from Inconel and machined flaws were created to establish the sensitivity of the technique. Numerical models of laser-generated ultrasonic waves have been created to gain a deeper understanding of physics, to optimize the set-up and to verify the experimental measurements. Results obtained on…
Oxidation mechanism of the Inconel 601 alloy at high temperatures
2010
The Inconel 601 alloy oxidation was performed in air, in the temperature range 1000-1150 °C, during 90 h. Kinetic results show that the parabolic behavior is always followed in this temperature range. The Arrhenius plot of the kp values shows two different activation energies. Between 1000 and 1050 °C the activation energy is E a1 = 160 ± 10 kJ/mol. In the 1050-1150 °C temperature range a higher value is calculated E a2 = 252 ± 20 kJ/mol. The E a2 value and the X-ray diffraction (XRD) results and scanning electron microscope (SEM) energy dispersive X-ray spectroscopy (EDS) examinations are in accordance with a scale growth mechanism limited by a growing Cr 2 O 3 scale acting as a diffusion …
Solidification microstructure during selective laser melting of Ni based superalloy: experiment and mesoscopic modelling
2019
International audience; A set of single track laser melting experiments was performed in a selective laser melting (SLM). The tracks were done on an Inconel 718 plate with various laser scan velocities at a constant laser power of 150 W. The geometries of the molten pool (MP), as well as the solidified dendrite structures, i.e., primary and secondary dendrite arm spacing (PDAS and SDAS), in the cross sections of the molten path were characterized to evaluate the effect of the laser scan velocity during SLM. Moreover, the local solidification thermal conditions (cooling rate R*, tip growth velocity V* and temperature gradient G*) at the MP bottom were deduced from the SDAS and the geometries…