The Temperature Dependence of Irradiation Induced Void Swelling in 20% Cold Worked Type 316 Stainless Steel Irradiated with 5 MeV Nickel Ions
The temperature dependence of swelling for 20% CW Type 316 SS containing nominally 15 ppm He has been established using 5 MeV nickel ions; swelling was measured using standard transmission electron microscopy techniques. The damage rate of this experiment is roughly 103 times faster than fast reactor irradiation resulting in a shift in the peak swelling temperature of +115±25°C.
Swelling is studied in the temperature range of 475 to 725°C after doses causing up to 105 displacements per atom. The technique is experimentally verified as a valid simulation of fast reactor irradiation for temperatures up to 625°C when the appropriate temperature shift is applied.
Swelling in the cold worked steels is less than that previously reported for an annealed steel at all temperatures and doses studied. However, above 625°C thermal recovery of the cold work results in a swelling behavior that gradually approaches that of annealed steel as the temperature and dose are increased. Swelling occurs in the temperature range of 525 to ~725°C with a maximum swelling at 625°C for both annealed and cold worked steels.
KeywordsIrradiate Surface Stereo Pair Void Size Dislocation Distribution Thermal Recovery
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- 1.C. Cawthorne, et al in Voids Formed by Irradiation of Reactor Materials, Symposium Proceedings, Reading University, 1971, p. 35.Google Scholar
- 2.R. S. Nelson and D. J. Mazey, Symposium on Radiation Damage in Reactor Materials, IAEA, Vienna, 1969, p. 1971.Google Scholar
- 3.W. G. Johnston, J. H. Rosolowski, A. M. Turkalo and T. Lauritzen, to appear in The Effects of Irradiation on Substructure and Mechanical Properties of Metals and Alloys, ASTM STP 529, October 1973.Google Scholar
- 4.The instrument used was a Dektak, manufactured by Sloan Industries, Santa Barbara, CA.Google Scholar
- 5.W. G. Johnston, J. H. Rosolowski, A. M. Turkalo, and T. Lauritzen, “Nickel Ion Bombardment of Type 304 Stainless Steel: A Comparison with Fast Reactor Swelling Data”, to appear in J. Nucl. Mat’l.Google Scholar
- 8.J. E. Spuiell et al., Met. Trans., 4, 1533 (1973).Google Scholar
- 9.K. D. Challenger, PhD Thesis, University of Cincinnati, 1973.Google Scholar
- 10.R. Bullough, and R. C. Perrin in Voids Formed by Irradiation of Reactor Materials, Symposium Proceedings, Reading University, 1971, p. 79.Google Scholar