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Impact of Phase Stability on the Corrosion Behavior of the Austenitic Candidate Materials For NNSWI.

Published online by Cambridge University Press:  28 February 2011

Daniel B. Bullen ,
Gregory E. Gdowski  and
R. Daniel McCright
Daniel B. Bullen
Affiliation:
Science & Engineering Associates, Inc., 5820 Stoneridge Mall Rd., Suite 100, Pleasanton, CA 94566
Gregory E. Gdowski
Affiliation:
Science & Engineering Associates, Inc., 5820 Stoneridge Mall Rd., Suite 100, Pleasanton, CA 94566
R. Daniel McCright
Affiliation:
Nuclear Waste Management Program, Lawrence Livermore National Laboratory, P.O. Box 808 L–369, Livermore, CA 94550.
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Abstract

The Nuclear Waste Management Program at Lawrence Livermore National Laboratory is responsible for the development of the waste package design to meet the Nuclear Regulatory Commission licensing requirements for the Nevada Nuclear Waste Storage Investigations (NNWSI) Project. The metallic container component of the waste package is required to assist in providing substantially complete containment of the waste for a period of up to 1000 years. Long term phase stability of the austenitic candidate materials (304L and 316L stainless steels and alloy 825) over this time period at moderate temperatures (100–250°C) can impact the mechanical and corrosion behavior of the metal barrier.

A review of the technical literature with respect to phase stability of 304L, 316L and 825 is presented. The impact of martensitic transformations, carbide precipitation and intermediate (σ. χ, and η) phase formation on the mechanical properties and corrosion behavior of these alloys at repository relevant conditions is discussed. The effect of sensitization on intergranular stress corrosion cracking (IGSCC) of each alloy is also addressed. A summary of the impact of phase stability on the degradation of each alloy in the proposed repository environment is included.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 112: Symposium P – Scientific Basis for Nuclear Waste Management XI , 1987 , 793
Copyright
Copyright © Materials Research Society 1988

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