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Structure-Process-Property Relations in Excimer Laser Surface Processed Ti-6Al-4V Alloy

Published online by Cambridge University Press:  26 February 2011

T. R. Jervis ,
T. G. Zocco  and
J. H. Steele Jr
T. R. Jervis
Affiliation:
Center for Materials Science
T. G. Zocco
Affiliation:
Materials Science and Technology Division
J. H. Steele Jr
Affiliation:
Nuclear Materials Technology Division Los Alamos National Laboratory, Los Alamos, NM 87545
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Abstract

Excimer laser processing results in very rapid solidification of metal surfaces. In addition to mixing or segregation processes, rapid heat treatment can result in phase transformations which yield beneficial surface properties. We have investigated the effect of pulsed excimer laser radiation on the microstructure and surface hardness of Ti-6A1-4V. This material undergoes a well defined martensite transformation during rapid quenching from temperatures in the β phase field. The depth of the transformed layer is thus a marker for the temperature profile during processing. We find that the depth of the transformed layer agrees well with a simple 1-D calculation of heat flow following the laser pulse. As measured by the nanoindenter, we find that the surface martensite is softer than the mechanically polished alloy. Multiple pulse processing at high fluences results in an increase in surface hardness, but at a depth much less than that of the martensite, suggesting an independent mechanism.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 201: Symposium A – Surface Chemistry and Beam-Solid Interactions , 1990 , 535
Copyright
Copyright © Materials Research Society 1991

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References

1. Katayama, S., Matsunawa, A., Morimoto, A., Ishimoto, S., & Arata, Y., in Laser Processing of Materials, Mukherjee, K. & Mazumder, J., Eds, (TMS, Warrendale, PA, 1984), p159.Google Scholar
2. Konitzer, D. G., Muddle, B. C., & Fraser, H. L., Metall. Trans. 14A 1979 (1983).Google Scholar
3. Bayles, R. A., Meyn, D. A., & Moore, P. G., in Lasers in Metallurgy, Mukherjee, K. & Mazumder, J., Eds. ((TMS, Warrendale, PA, 1981) p 127.Google Scholar
4. Jervis, T. R., Nastasi, M., Hirvonen, J-P., & Zocco, T. G., In press. Proceedings of the 10th International Conference on Boron, Borides, and Related Compounds, Albuquerque, NMGoogle Scholar
5. Gregson, V. G., in Laser Materials Processing, Bass, M., Ed. (North Holland, Amsterdam, 1983), p 201.Google Scholar
6. Jervis, T. R., Nastasi, M., Zocco, T. G., & Martin, J. A., Appl. Phys. Lett. 53 75 (1988).Google Scholar
7. Jervis, T. R., Hirvonen, J-P., Nastasi, M., and Cohen, M. R., Mat. Res. Soc. Symp. Proc. 157 395 (1990).Google Scholar
8. Oliver, W. C., Hutchings, R., & Pethica, J. B, ASTM Spec. Tech. Pub. 889 90 (1986).Google Scholar
9. Doerner, M. F. & Nix, W. D., J. Mater. Res. 1 601 (1986).Google Scholar
10. Collings, E. W., The Physical Metallurgy of Titanium Alloys, (ASM, Metals Park, OH 1984), p. 141.Google Scholar
11. Liu, Z. & Wels, G., Metall. Trans. 19A 527 (1988).Google Scholar