Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-18T06:35:29.515Z Has data issue: false hasContentIssue false
  • English
  • Français

Influence of Initial Grain Boundary Composition on the Evolution of Radiation-Induced Segregation Profiles

Published online by Cambridge University Press:  15 February 2011

J.T. Busby ,
G.S. Was ,
S.M. Bruemmer ,
D. J. Edwards  and
E.A. Kenik
J.T. Busby
Affiliation:
Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Ml, 48109-2104, jbusby@engin.umich.edu
G.S. Was
Affiliation:
Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Ml, 48109-2104
S.M. Bruemmer
Affiliation:
Pacific Northwest National Laboratory, Richland, WA, 99352
D. J. Edwards
Affiliation:
Pacific Northwest National Laboratory, Richland, WA, 99352
E.A. Kenik
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831
Get access

Abstract

Radiation-induced segregation (RIS) has been identified as a potential contributor to irradiation-assisted stress corrosion cracking (IASCC) of austenitic stainless steels in reactor core components. The occurrence of grain boundary segregation prior to irradiation influences both the shape and magnitude of RIS profile development during subsequent irradiation. In an effort to better understand the impact of this pre-irradiation enrichment on RIS profile development, the evolution of grain boundary Cr segregation profiles with irradiation dose has been characterized. Commercial purity and high-purity austenitic stainless steels with different initial levels of grain boundary Cr have been irradiated with neutrons (at 275°C) or protons (at 360-400°C) to doses up to ∼5 dpa. Grain boundary composition profiles were measured before and after irradiation using scanning transmission electron microscopy with energy dispersive xray spectroscopy (STEM-EDS). The initial enrichment of Cr is shown to delay radiation-induced Cr depletion and produce a “W-shaped” profile at low irradiation doses. Further irradiation causes the central peak of the W to decrease, eventually resulting in the classical “V-shaped” depletion profile. Possible mechanisms for the pre-irradiation enrichment and its evolution into a “W-shaped” profile will be discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 540: Symposium N / Microstructural Processes in Irradiated Materials , 1998 , 451
Copyright
Copyright © Materials Research Society 1999

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

[1] Was, G.S. and Bruemmer, S.M., J. Nucl. Mater., 216, 326–347, (1994).Google Scholar
[2] Jenssen, A. et al. , Corrosion 96, NACE, paper 101.Google Scholar
[3] Damcott, D.L., Cookson, J.M., Rotberg, V.H., and Was, G.S., Nucl. Inst. and Meth. in Phys. Res. B, 99, 780–783, (1995).Google Scholar
[4] Damcott, D.L., Cookson, J.M., Carter, R.D. Jr., Martin, J.R., Atzmon, M., and Was, G.S., Radiat. Eff. Def. Solids, 118, 383, (1991).Google Scholar
[5] Jenssen, A. et al. , Proceedings of the 7th Env. Deg., NACE Int., Houston, TX, 1995, 1043 Google Scholar
[6] Allen, T. R., Damcott, D. L., Was, G. S., and Kenik, E. A., Proc. of the 7th Env. Deg., NACE International, Houston, TX, 1995, 997.Google Scholar
[7] Was et al., These proceedings.Google Scholar
[8] , Goodwin et al. , Effects of Rad. On Mater. 19th Int. Symp., ASTM STP 1366., 1998.Google Scholar
[9] Allen, T., Ph.D. Dissertation, University of Michigan, 1996.Google Scholar
[10] Simonen, E.P. and Bruemmer, S.M., Proc. of 8th Env. Deg., ANS, 1997, p. 75 Google Scholar
[11] Simonen, E.P. and Bruemmer, S.M., Proc. Corrosion 98, National Association of Corrosion Engineers, 1998, Paper 139.Google Scholar
[12] Cookson, J. et al. , Proceedings of the 5th Env. Deg., NACE Int., Houston, TX, 1993, 841.Google Scholar
[13] Karlsson, L. et al. Acta Met., 36, No. 1, p. 1–48, (1988).Google Scholar
[14] Kenik, E. et al. These proceedings.Google Scholar
[15] Sigh, C. and Sanchez, J. M., Acta Met., 36, No. 2, p. 367–375, (1988).Google Scholar