TY - GEN
T1 - Characterization of type 304L stainless steel
T2 - 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011
AU - Miller, B. D.
AU - Burke, M. G.
PY - 2011
Y1 - 2011
N2 - The ASTM A262 Practice A procedure is frequently used to assess whether Type 304/304L austenitic stainless steels are "sensitized". In this study, Type 304L steel containing 18 ppm boron examined in the as-received (mill solution-annealed) condition exhibited a "dual" structure after the Practice A test despite its low C content. Detailed characterization of this alloy was performed to assess the precipitation behavior in this steel. Intergranular, Cr-rich M2B- borides, identified by electron diffraction, were observed in the as-received condition. Samples aged at 700°C (nominally "sensitized") produced fully "ditched" grain boundaries having Cr levels in excess of 14 wt.% and concomitant Cr-depleted zones less than 50 nm in extent. Despite exhibiting fully "ditched" grain boundaries, Cr levels of ∼18-20 wt.% with no Cr-depleted zones were detected in specimens aged at 900°C (nominally "stabilized"). These results show the Practice A test can be mis-used/mis-interpreted for assessing sensitization.
AB - The ASTM A262 Practice A procedure is frequently used to assess whether Type 304/304L austenitic stainless steels are "sensitized". In this study, Type 304L steel containing 18 ppm boron examined in the as-received (mill solution-annealed) condition exhibited a "dual" structure after the Practice A test despite its low C content. Detailed characterization of this alloy was performed to assess the precipitation behavior in this steel. Intergranular, Cr-rich M2B- borides, identified by electron diffraction, were observed in the as-received condition. Samples aged at 700°C (nominally "sensitized") produced fully "ditched" grain boundaries having Cr levels in excess of 14 wt.% and concomitant Cr-depleted zones less than 50 nm in extent. Despite exhibiting fully "ditched" grain boundaries, Cr levels of ∼18-20 wt.% with no Cr-depleted zones were detected in specimens aged at 900°C (nominally "stabilized"). These results show the Practice A test can be mis-used/mis-interpreted for assessing sensitization.
UR - https://www.scopus.com/pages/publications/84867590302
M3 - Conference contribution
AN - SCOPUS:84867590302
SN - 9781622761944
T3 - 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011
SP - 469
EP - 478
BT - 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011
PB - John Wiley and Sons Inc.
Y2 - 7 August 2011 through 11 August 2011
ER -