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Interaction of Void-Induced Phase Instability and Subsequent Void Growth in AISI 304 Stainless Steel

Porter, DL
Senior Metallurgical Engineer,Argonne National Laboratory-West,ID,

Garner, FA
Senior Staff Scientist,Pacific Northwest National Laboratory,WA,

Bond, GM
Associate Professor,New Mexico Institute of Mining and Technology,NM,


Pages: 10    Published: Jan 2000


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Source: STP1366-EB


Abstract

There are two types of radiation-induced phase instabilities that AISI 304 is prone to develop at temperatures in the 400–550°C range at dpa rates typical of fast reactors, and there is some concern that these instabilities may shift to lower temperatures (≥400°C) at lower dpa rates typical of pressurized water reactors.

One of these instabilities, the void-induced γ→α transformation, is investigated in this study at dpa rates typical of both types of reactors. The mode of nickel segregation shifts somewhat at PWR-relevant conditions, but the γ→α transformation has not yet been observed in the range 380–400°C for swelling levels less than 2%.


Keywords:
AISI 304, AISI 304L, void swelling, embrittlement, ferrite, displacement rate

Paper ID: STP12439S
Committee/Subcommittee: E10.07
DOI: 10.1520/STP12439S
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