scholarly journals Properties and influence of microstructure and crystal defects in Fe2VAl modified by laser surface remelting

2021 ◽  
Vol 193 ◽  
pp. 153-157
Author(s):  
Leonie Gomell ◽  
Moritz Roscher ◽  
Hanna Bishara ◽  
Eric A. Jägle ◽  
Christina Scheu ◽  
...  
Keyword(s):  
Crystal Defects ◽  
Laser Surface ◽  
Laser Surface Remelting

Improvement in wear resistance of hyper-eutectic AlSi cast alloy by laser surface remelting

2003 ◽  
Vol 169-170 ◽  
pp. 468-471 ◽  
Author(s):  
S. Tomida ◽  
K. Nakata ◽  
S. Shibata ◽  
I. Zenkouji ◽  
S. Saji
Keyword(s):  
Wear Resistance ◽  
Cast Alloy ◽  
Laser Surface ◽  
Laser Surface Remelting

Numerical and Experimental Analysis of Laser Surface Remelting of Al 9wt% Si Alloy Samples

2008 ◽  
Vol 587-588 ◽  
pp. 721-725
Author(s):  
Noé Cheung ◽  
Kleber A.S. Cruz ◽  
Noman H. Khan ◽  
Amauri Garcia
Keyword(s):  
Heat Transfer ◽  
Numerical Simulations ◽  
Rapid Heating ◽  
Thermal Action ◽  
High Energy ◽  
Laser Surface ◽  
High Energy Density ◽  
Temperature Fields ◽  
Laser Materials ◽  
Laser Surface Remelting

Laser materials processing has been widely applied in industrial processes due to unique precision and very localized thermal action furnished by the laser’s high energy density and power controllability. With the inherent rapid heating and cooling rates to which this surface layer is subjected, this process provides an opportunity to produce different microstructures from that of the bulk metal leading to useful properties. The aim of this work is to develop a heat transfer mathematical model based on the finite difference method in order to simulate temperature fields in the laser surface remelting process. Convective heat transfer in the remelted pool is taken into account by using the effective thermal conductivity approach. Theoretical predictions furnished by previous models from the literature were used for validation of numerical simulations performed with the proposed model. Experiments of laser surface remelting of Al-9 wt pct Si samples was carried out in the present investigation, and numerical simulations was applied for the laser machine operating parameters. The work also encompasses the analysis of microstructural and microhardness variations throughout the resulting treated and unmolten zones.

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