Laser-modified aluminium surfaces with iron
- 48 Downloads
Possible improvements in the mechanical properties of surface-coated aluminium have been investigated. Aluminium plasma sprayed with iron powder was processed using two different laser-beam settings (integrated and defocused) with varying processing parameters. Mechanical and microstructural characterizations of the specimens revealed great differences between the two laser-beam settings. The defocused laser beam showed a clear improvement of hardness which was not observed for the integrated laser beam. The integrated laser beam gave deep melt pools with large Al3Fe particles (10–200 μm) in the top layer, and smaller α-Al (Fe, Mn)Si particles (0.1–0.3 μm) throughout the melt pool. Small, partly coherent Al3Fe precipitates (0.25 μm long) were found between the large Al3Fe particles. Processing with a defocused laser beam produced a shallower melt pool with a homogeneous distribution of the iron in the form of Al3Fe particles.
KeywordsIron Polymer Aluminium Mechanical Property Laser Beam
Unable to display preview. Download preview PDF.
- 5.P. Villars and L. D. Calvett, “Pearson's Handbook of Crystallographic Data for Intermetallic Phases” (American Society for Metals, Ohio, 1985).Google Scholar
- 6.P. Skjerpe, Doctoral Thesis, University of Oslo, Norway (1989).Google Scholar
- 7.B. H. Kear, J. W. Mayer, J. M. Poate and P. R. Strutt, in “Metallurgical Treatises”, edited by J. K. Tien and J. F. Elliott (Metals Society, London, 1981) p. 321.Google Scholar
- 8.E. von Blank, Z. Metallkde 63 (1972) 324.Google Scholar
- 9.C. M. Adam and R. G. Bourdeau, in “Proceedings of the Second International Conference on Rapid Solidification Processing”, edited by R. Mehrabian, B. H. Kear and M. Cohen (Claitor, Baton Range, 1980) p. 246.Google Scholar