Characteristics of laser surface melted aluminum alloys
- 15 March 1978
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 17 (6) , 906-910
- https://doi.org/10.1364/ao.17.000906
Abstract
Specimens of Al–Fe 1–4 w/o, 2024 and 6061 Al have been surface melted with a pulsed Nd-glass laser. A TEM and SEM study showed that the dendrite spacings were from 2500 Å to 4000 Å which corresponds to a cooling rate of over 106 °C/sec. Melt depths obtained were in the range of 30–100 μm. No significant surface vaporization was observed at energy densities up to 440 J/cm2. Fracture surfaces of the commerical alloys demonstrated elongated porosity in the melt areas, probably due to internal hydrogen.Keywords
This publication has 3 references indexed in Scilit:
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