Abstract
Laser surface alloying by the powder feed method of the iron based superalloy Incoloy 800H with aluminium has been carried out. The effects of different preparation parameters, like laser scan speed and powder feed rate, on the morphology of the alloyed zone have been investigated. Microstructure and composition have been determined by scanning electron microscopy (SEM), optical microscopy, and x-ray fluorescence spectroscopy. Three different phases with different Al-content have been distinguished. The observed Al-enrichment at the surface, the presence of Ni-Al and Fe-Al intermetallic compounds, and the considerable grain refining of the alloyed zone with respect to the substrate, make this surface modification technique a very good method to improve the corrosion behaviour of the Incoloy 800H super-alloy.
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References
W. J. Molloy, Adv. Mater. Process.10/90, 23 (1990).
T. Khan, Adv. Mater. Process.1/90, 19 (1990).
M. Yoshimura and F. H. Stott, MRS Bull. 20 (October 1994).
G. W. Goward, Mater. Sci. Technol.2, 194 (1986).
R. W. Richards, R. D. Jones, P. D. Clements, and H. Clarke, Int. Mater. Rev.39, 191 (1994).
G. C. Wood and F. H. Stott, Mater. Sci. Technol.3, 519 (1987).
J. Mazumder and J. Singh, inLaser surface treatment of metals, Vol. 115 ofNATO ASI Series E. edited by C. W. Draper and P. Mazzoldi (Kluwer Academic Publishers, Dordrecht, Boston, London, 1986), p. 297.
J. J. de Damborenea and A. J. Vázquez, J. Mater. Sci.27, 1271 (1992).
B. C. Oberländer and E. Lugscheider, Mater. Sci. Technol.8, 657 (1992).
E. McCafferty and P. G. Moore, inLaser Surface Treatment of Metals, Vol. 115 ofNATO ASI Series E, edited by C. W. Draper and P. Mazzoldi (Kluwer Academic Publishers, Dordrecht, Boston, London, 1986), p. 263.
J. J. de Damborenea and A. J. Vázquez, J. Mater. Sci.28, 4775 (1993).
J. de Damborenea, V. López, and A. J. Vázquez, Surf. Coat. Technol.70, 107 (1994).
J. H. Abboud, D. R. F. West, and R. D. Rawlings, Mater. Sci. Technol.10, 848 (1994). 2
W. Maocai and W. Weitao, Surf. Coat. Technol.72, 181 (1992).
J. H. Abboud and D. R. F. West, Mater. Sci. Technol.7, 353 (1991).
W. W. Steen, inLaser surface treatment of metals, Vol. 115 ofNATO ASI Series E, edited by C. W. Draper and P. Mazzoldi (Kluwer Academic Publishers, Dordrecht, Boston, London, 1986), p. 369.
B. Grünenwald, E. Bischoff, J. Shen, and F. Dausinger, Mater. Sci. Eng.8, 637 (1992).
S. Zhu, F. Wang, H. Low, and W. Wu, 1Surf. Coat. Technol.71, 9 (1995).
F. Kostrubiec, J. Mater. Sci.26, 6044 (1991).
H. J. Hegge and J. T. M. de Hosson, J. Mater. Sci.26, 711 (1991).
C. Chan, J. Mazumder, and M. M. Chen, Metall. Trans. A15A, 2175 (1984).
S. Kou and Y. H. Wang, Metall. Trans. A17A, 2265 (1986).
Ternary Alloys, edited by G. Petzow and G. Effenberg (VCH, Weinheim, Germany, 1991), Vol. 3, p. 369;ibid p. 400;ibid Vol. 4, p. 309.
J. L. Gonzdlez-Carrasco, P. Adeva, and M. Aballe, Mater. Sci. Eng. A128, 231 (1990).
W. F. Gale, T. C. Totemeier, and J. E. King, Metall. Mater. Trans. A26, 949 (1995).
C. G. McKamey, J. H. DeVan, P. F. Tortorelly, and V. K. Sikka. J. Mater. Res.6, 1779 (1991).