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Some Effects of Microstructure and Chemistry on Corrosion and Hydrogen Embrittlement of Ticode–12*

Published online by Cambridge University Press:  21 February 2011

J. A. Ruppen ,
R. B. Diegle ,
R. S. Glass  and
T. J. Headley
J. A. Ruppen
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185, USA
R. B. Diegle
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185, USA
R. S. Glass
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185, USA
T. J. Headley
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185, USA
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Abstract

Effects of microstructure and chemistry on corrosion and hydrogen embrittlement of TiCode-12 have been investigated. Heat treating mill-annealed TiCode-12 in the temperature range 500–750°C results in a sensitization effect, i.e., an increase in the uniform corrosion rate when tested in either boiling 1N HCl or a MgCl2 brine. This effect is caused by microstructural changes involving the precipitation of Ti2Ni. Electrochemical studies indicate that sensitization results from galvanic coupling between Ti2Ni, acting as cathode, and the α-Ti matrix with resultant shifts in corrosion potential. Increasing the Fe content of the alloy promotes the sensitization effect.

Hydrogen embrittlement of TiCode-12 was studied using the slow strain rate technique. Hydrogen concentrations to 130 wppm did not cause embrittlement. However, above 220 wppm hydrogen, degradation was observed as a decrease in mechanical behavior and the appearance of cleavage-like secondary cracks. The embrittlement was dependent on temperature and alloy chemistry but not environment (air or brine).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 15: Symposium D – Scientific Basis for Nuclear Waste Management VI , 1982 , 685
Copyright
Copyright © Materials Research Society 1983

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Footnotes

*

This work performed at Sandia National Laboratories supported by the U.S. Department of Energy under contract number DE-AC04–76DP00789.

References

REFERENCES

1. Molecke, M. A., Schaefer, D. W., Glass, R. S. and Ruppen, J. A., Sandia Report SAND81-1585, October 1981.Google Scholar
2. Molecke, M.A., Ruppen, J. A. and Diegle, R. B., presented at the American Nuclear Society annual meeting, Los Angeles, June 1982; to be published.Google Scholar
3. Williams, J. C., Titanium Science and Technology, Vol. 3, Plenum Press, New York, N.Y. (1973), p. 1433.Google Scholar
4. Murakami, Y., Titanium 80, Vol. 1, Kimura, H. and Izumi, O., Eds., Metallurgical Society of AIME (1980), p. 153.Google Scholar
5. Rhodes, C. G. and Williams, J. C., Metallurgical Transactions, Vol. 8 (1975), p. 1670.Google Scholar
6. Rhodes, C. G. and Paton, N. E., Metallurgical Transactions, Vol. 10 (1979), p. 209.Google Scholar
7. Glass, R.S., presented at the 162nd Meeting of The Electrochemical Society, Detroit, October 17–21, 1982; to be published.Google Scholar
8. Covington, L. C. and Schutz, R. W., Industrial Applications of Titanium and Zirconium, ASTM STP 728, E. W. Kleefisch, Ed., American Society for Testing and Materials, 1981, pp. 163–180.Google Scholar
9. de Gelas, B., Charquet, D., Armand, M. and Tricot, R., Titanium and Titanium Alloys, Vol. 2,Google Scholar
9a. Williams, J. C. and Belov, A. F., Eds., Procs. Third Int. Conf. on Titanium, Plenum Press, N.Y. (1981), pp. 1029–1037.Google Scholar
10. Hall, I. W. and Hammond, C., Metal Science, Vol. 12 (1978), p. 339.CrossRefGoogle Scholar
11. Banerjee, D. and Arunachalam, V. S., Acta Metallurgica, Vol. 29 (1981), p. 1685.CrossRefGoogle Scholar
12. Caskey, G. R., Materials Science and Engineering, Vol. 14 (1974) p. 109.Google Scholar
13. Paton, N.E., Hickman, B. S. and Leslie, D. H., Metallurgical Transactions, Vol. 2, (1971), p. 2791.Google Scholar
14. Moody, N. and Robinson, S., Sixth International Symposium on the Scientific Basis for Radioactive Waste Management, November 1982, Boston, MA.Google Scholar