Mar 01, 2020 · Stability of laser coloring. As for the laser-induced stainless steel surface coloring process, a large number of studies have shown that the parameters of the laser and the external environmental conditions have an impact on the coloring effect, such as scanning speed, scanning interval, laser wavelength, environmental gas , , , . Many
Effect of the Plasma Deposition Parameters on the ium carbide (TiC) hard coatings have been obtained on steel and silicon substrates by r.f. magnetron sputtering process. Two layer coatings have been deposited in order to improve adhesion on steel. The lower layer was titanium metal and the upper TiC layer was obtained by reactive sputtering of the titanium target in Ar and methane gas mixture.
Mar 16, 2017 · Sobron, P., Wang, A. & Sobron, F. Extraction of compositional and hydration information of sulfates from laser-induced plasma spectra recorded under Mars atmospheric conditions - Implications for
Image Processing on High Speed Photograph of CO2 Laser In this paper the high speed photograph of CO2 laser welding plasma is analyzed in the light of isogrey scale line of photograph. It is found that the image of laser induced plasma can be divided
Laser-Induced-Plasma-Assisted Ablation and Abstract:Laser-induced-plasma-assisted ablation (LIPAA) is a promising micro-machining method that can fabricate microstructure on hard and transparent double-polished single crystal sapphire (SCS).
A Ni17Mo7Cr-based superalloy was laser surface-modified to improve its tribological properties. Si particles were employed as coating materials. Si melted on the surface of the alloy during the process, triggering the formation of Mo6Ni6C carbides and NiSi intermetallics. A defect-free coating obtained was mostly made up of primary Mo6Ni6C and γ-Ni31Si12, as well as a eutectic
OSA Process monitoring based on plasma emission for Defects and process irregularities influence the bonding strength and thus the stability and lifetime of welded glass components. The present paper proposes to monitor the laser-based glass welding process by means of a single photodetector that records the radiation emitted from the laser-induced plasma. It is shown that the plasma emission provides information about irregularities of the
Phase transformation-induced improvement in hardness microscopy, hardness test and tribology test. After spraying, WC particles are evenly distributed in the coating. The remelting process induced the decarburizing reaction of WC, resulting in the formation of dispersed W. 2. C. The dispersed W. 2. C particles play an important role in the dispersion strengthening.
Therefore, the stability and accuracy of the measurement were hard to ensure because of the large spectral fluctuation in the industrial applications. Laser induced plasma is the source of LIBS, and the change of the profile and the intensity of the plasma is the immediate cause of the spectral fluctuation.
Stability evaluation of laser-MAG hybrid welding process Aug 01, 2019 · 1. Introduction. Laser-arc hybrid welding is a process where a hybrid heat source welding mode in which a laser heat source and an arc heat source are combined .Laser-MIG/MAG hybrid welding technology has the advantages of high welding speed, lower heat input, excellent gap bridging ability, and good penetrating ability , , , .. Previous literature reports have helped deepen the
Two-pass laser welding of AZ31B magnesium alloy Feb 01, 2015 · An Ocean Optics spectrometer was used to detect the laser induced plasma plume spectrum. The detected spectra was then used to calculate electron temperatures for the two different processes, TPLW and OPLW. The electron temperature was used to compare the stability of the laser welding process for two experimental conditions.
Congress on Applications of Laser & Electro-Optics (ICALEO 2017) Atlanta GA USA (2017) paper no. M903. [Link zur Konferenz] T. Czotscher, F. Vollertsen:Process stability of laser induced plasma for hardness measurements Lasers in Manufacturing (LIM17) eds.:L. Overmeyer, U. Reisgen, A. Ostendorf, M. Schmidt (2017). [Link to PDF]