THE THEORETICAL AND EXPERIMENTAL STUDY OF SOME METALS HEATING AND MELTING UNDER THE ACTION OF LASER RADIATION
Journal Title: Journal of Science And Arts - Year 2008, Vol 9, Issue 2
Abstract
This study presents both theoretical and experimental results on the laser irradiation of some metals (steel, aluminium, titanium), using a Nd:YAG laser. The theoretical study involves the solving of heat equation for half-infinite targets in case that, between the thickness of target (h), the diameter of laser spot (Ds) and the thermic diffusion length (lth), exists the relation h>>Ds>lth. The determination of the temperature at the surface of the irradiated material allows quantitative estimations regarding the induced thermodeformation and the involved phase transition, in our case, the melting. The confrontation with experience is achieved through the comparison of the thermo-deformation sizes and obtained craters and of the others related parameters with the direct microscopically measurements. The calculated values are in proper correlation with the experimental ones, the observed differences having as major cause the insufficiently precise knowledge of the involved physical values of observables at high reached temperature on the irradiated surfaces.
Authors and Affiliations
Sergiu Dinu, Calin Oros, Marinela Voicu, Gabriel Dima, Claudia Stihi, Michel Wautelet
Keywords
Related Articles
- EP ID EP91681
- DOI -
- Views 212
- Downloads 0
DETECTION OF LOCAL NOISE IN THE TEXTURAL IMAGES
The paper presents a classification and identification method for the local noise in the textural images. To identify local noise in the textural images, a reference database with the textural images is used. For the reg...
RESEARCH PERFORMANCE EVALUATION OF CHEMISTRY GROUP FROM VALAHIA UNIVERSITY TARGOVISTE
This article presents an analysis of the scientific performance obtained by the Chemistry Group members of Department of Science from Valahia University using traditional scientometric indicators, including h-index and a...
MINERALOGICAL AND STRUCTURAL FINGERPRINT METHODS OF NANOMINERALS IDENTIFICATION
The combined investigation techniques, electron probe microanalysis (EPMA), Mössbauer spectroscopy (NGR), transmission electron microscopy (TEM), selected area electron diffraction (SAED), X-ray diffraction (XRD) ev...
CONVEX HULL PROBLEM, LATTICE POINTS AND APPLICATIONS
Problem of finding convex hull is one of the central problems of computational geometry. It appears both applications in economic, financial, environmental, architectural and analytical geometry in specific issues. Latti...
OPERATION TRANSFORM FORMULAE FOR GENERALIZED FRACTIONAL HILBERT TRANSFORM
The generalized fractional Hilbert transform has many applications in several areas including signal processing. In this paper we have proved some Operation Transform Formulae for the generalized fractional Hilbert trans...