Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-29T07:29:11.905Z Has data issue: false hasContentIssue false
  • English
  • Français

Nanoindentation Hardness of 17–4PH Stainless Steel Irradiated With 2.5 MEV PER Nucleon 20NE2+ Ions

Published online by Cambridge University Press:  28 February 2011

D. S. Grummon ,
R. Schalek ,
T. Rachel ,
H. Schock ,
R. M. Ronningen  and
Wm. C. Mcharris
D. S. Grummon
Affiliation:
Dept of Metallurgy, Mechanics and Materials Science, Michigan State University, East Lansing, MI 48824.
R. Schalek
Affiliation:
Dept of Metallurgy, Mechanics and Materials Science, Michigan State University, East Lansing, MI 48824.
T. Rachel
Affiliation:
Dept. of Mechanical Engineering, Michigan State University, East Lansing, MI 48824.
H. Schock
Affiliation:
Dept. of Mechanical Engineering, Michigan State University, East Lansing, MI 48824.
R. M. Ronningen
Affiliation:
Ntional Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824.
Wm. C. Mcharris
Affiliation:
Ntional Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824.
Get access

Abstract

Direct ion implantation of radioactive isotopes, such as 7Be or 22Na, has recently been of interest as a means of surface layer activation for purposes of wear-rate measurement in material systems for which activation by conventional proton irradiation is ineffective. Though direct implantation doses anticipated for adequate wear measurement sensitivity are expected to be quite low (∼1012 cm−2), the potential for alteration of wear properties by ion damage cannot be ignored. The present work was designed to simulate 22Na implantation with non-radioactive 20Ne irradiations into specimens of 17–4PH stainless steel which had been deliberately heat treated to contain 98 vol% metastable martensite. Specimens were subjected to doses of 2×1012, 2×1013 and 2×1014 cm−2 of 20Ne2+, applied at a total energy of 50 MeV, giving a projected ion range (determined by TRIM-91 computations) of approximately 10 μm. Nanoindentation surface hardness traverses were conducted to detect any material softening which may have resulted from ion-solid interactions within the projected range. Though doses of > 1014 cm−2 produced a detectable softening (apparent as a dip in the hardness level corresponding to locations near the end of the ion range) the maximum dose for a negligible effect on nanoindentation hardness was found to be approximately 1013 cm−2, well above the doses anticipated for use in wear studies employing direct ion implantation of radioisotopes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 235: Symposium A – Phase Formation and Modification by Beam-Solid Interactions , 1991 , 577
Copyright
Copyright © Materials Research Society 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Genre, A. and Schatz, G., Proc. 7th Int. Conf. on Cyclotrons and their Applications, p. 496 (1975).CrossRefGoogle Scholar
2. Herkert, B., Proc. 7th Int. Conf. on Cyclotrons and their Applications [1], p. 514 (1975).CrossRefGoogle Scholar
3. Ettinger, K. V., Fremlin, J. H. and Askouri, N. A., Proc. 7th Int. Conf. on Cyclotrons and their Applications [1], p. 518 (1975).CrossRefGoogle Scholar
4. Mallory, M. L., Ronningen, R. M., McHarns, R. M., Shenil, B.. Dardenne, Y. Y. and Schock, H. J.. 10th Conf. on the Application of Accelerators in Research and Industry, Denton Texas, Nov 7–9 (1988).Google Scholar
5. Laumer, H., Austin, S. M., Panggabean, L. M. and Davids, C. N., Phys. Rev. C 8, p. 483 (1973).CrossRefGoogle Scholar
6. Jacobs, W. W., Bodanski, D., Chamberlain, D. and Oberg, D. L., Phys. Rev. C 9, p. 2134 (1974).CrossRefGoogle Scholar
7. Blosser, H. G.. IEEE Trans. Nucl. Sci. NS-26 No. 2, p2040 (1979).CrossRefGoogle Scholar
8. Mallory, M. L.. IEEE Trans. Nucl Sci. NS-30 No. 4, p2061 (1983).CrossRefGoogle Scholar
9. Rack, H. J. and Kalish, D., Met. Trans 5, pp. 1595–1604 (1974].CrossRefGoogle Scholar
10. Anthony, K. C., J. Met., Dec. 1963 pp. 922–927(1963).Google Scholar
11. Rice, S. L., Nowotny, H. and Wayne, S. P.. Wear 103, pp. 175–185 (1985).CrossRefGoogle Scholar
12. Biersack, J.P. and Hagg-mark, L.G., Nucl. Instr. and Meth. 174 p257 (1980).CrossRefGoogle Scholar
13. Ercer, G. M, Wood, S., Boes, D. and Schreurs, J., Wear 89, pp 201–214 (1983).CrossRefGoogle Scholar