The effect of inert particles on grain structure development from alloy melt during laser rapid solidification has been investigated. It is found that the presence of Al2O3 particles may disrupt the usual epitaxial grain structure evolution of an aluminium 7075 alloy when processed by laser surface remelting. This result, in addition to observations of crystal termination at the particles and grain refinement in particle dense regions, indicates that a mechanism of particle restricted grain growth operates.
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References
1.
KouS. and LEY.: Metall. Trans. A, 1985, A16, 1345-1352.
2.
RIEKERC. and MORRISD. G.: Mater. Scl Eng. A, 1991, A133,854–858.
3.
GREMAUDM., ALLEND. R., RAPPAZM., and PEREPEZKOJ. H.: Acw Mater., 1996, 44, 2669–2681.
4.
VRIESH. W. DE and OUDENG. DEN: Mater. Scl Technol, 1999, 15, 202–206.
5.
MRIDHAS. and BAKERT. N.: J. Mater. Process. Technol, 1997, 63, 432–437.
6.
COOPERK. P., SLEBODNICKP. L., LUCASK. E., and HOGANE. A.: J. Mater. Scl, 1998, 33, 3805–3816.
7.
LIUY. B., HUJ. D., CAOZ. Y., and ROHATGIP. K.: Wear, 1997,206, 83–86.
8.
MORTENSENA. and nNI.Int. Mater. Rev., 1992, 37, (3), 101–128.
9.
ROHATGIP. K., PASCIAKK., NARENDRANATHC. S., RAYS., and SACHDEVA.: J. Mater. Scl, 1994, 29, 5357–5366.
10.
LIUY. H., HEZ. M., LIUS. F., and YANGz. C.: J. Mater. Scl Lett., 1993, 12, 254–256.
11.
HUNTJ. D.: Mater. Scl Eng., 1984, 65, 75–83.
12.
ASTHANAR. J.: J. Mater. Scl, 1998, 33, 1679–1698.
13.
BUSSACA. DE and GANDINCH. A.: Mater. Scl Eng. A, 1997, A237,35–42.
14.
LAPINJ. and IVANJ.: Scr. Metall., 1995, 33, (5), 391–397.
15.
RAPPAZM.GANDINCH.-A., DESBIOLLESJ.-L., and ITIEVOZPH.: Metal. Trans. A, 1996, A27, 695–670.
16.
FABIETTIL. M., SEETHARAMANV., and TRIVEDIR.: Metall. Trans. A, 1990, A21, 1299-1310.
