Laser treatment of aluminum surface: Analysis of thermal stress field in the irradiated region

Laser surface modification of aluminium and magnesium alloys

“…Thus, for example, Yilbas et al (2009) carried out CO 2 laser pulsed remelting of an aluminium surface and modelled the stress field in the irradiated region z · to determine temperature distribution and thermal stresses with laser pulse duration, the results of modelling being verified using X-Ray Diffraction (XRD). The model indicated an initial rapid increase in surface temperature followed by an almost steady increase to maximum temperature; the corresponding rate of cooling is initially high, but progressively diminishes.…”

“…Research is currently moving away from fundamental, generic investigations towards dedicated application, as described for laser shock processing of aluminium alloys (Zhang et al, 2008), although the empirical verification © Woodhead Publishing Limited, 2010 of models (Abderrazak et al, 2008;Almeida and Vilar, 2008;Yilbas et al, 2009) is still on the agenda. It is clear that interest is generated by processes that can maximise performance.…”

Simulation and optimization of Al–Fe aerospace alloy processed by laser surface remelting using geometric Multigrid solver and experimental validation

“…On the other hand, in the region situated behind the LMZ presents the lowest scattering of isotherms, this is due to the rapidly cooling which occurs in this region occurs. Yilbas et al [10] in their research, confirmed that the heat ahead of the LMZ is transferred by conduction, led by a higher thermal gradient. Therefore, the beam is applied on a highly localized area, while the remainder of the material adjacent to the weld fillet is at ambient temperature.…”

Thermomechanical modelling of laser surface glazing for H13 tool steel

“…For last few years, through modelling and simulation, scientists have been trying to predict the residual stresses in laser surface modification techniques of different materials (metals and alloys) and correlating with process parameters [13][14][15]. For instance, a 3D modelling of SLS of H13 tool steel predicting residual stress was carried out by Ibraheem et al using ANSYS code.…”

“…The development of compression stress field below the surface was reported here. A direct coupling method of thermal and structural analysis was applied by ANSYS in this work [13]. In direct coupling technique, single finite element analysis is conducted for accomplishing both thermal and structural process simultaneously using direct coupling element.…”