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Radiation-induced segregation in desensitized type 304 austenitic stainless steel

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Title Radiation-induced segregation in desensitized type 304 austenitic stainless steel
 
Creator AHMEDABADI, P
KAIN, V
ARORA, K
SAMAJDAR, I
SHARMA, SC
BHAGWAT, P
 
Subject STRESS-CORROSION CRACKING
PROTON-IRRADIATED 304-STAINLESS-STEEL
MECHANICAL RESPONSE
SENSITIZATION
SUSCEPTIBILITY
WATER
TEMPERATURE
KINETICS
BEHAVIOR
IONS
Austenitic stainless steel
Desensitization
Proton-irradiation
Electrochemical potentiokinetic reactivation
Atomic force microscopy
Radiation-induced segregation
 
Description Radiation-induced segregation (RIS) in desensitized type 304 stainless steel (SS) was investigated using a combination of electrochemical potentiokinetic reactivation (EPR) test and atomic force microscopy (AFM). Desensitized type 304 SS was irradiated to 0.43 dpa (displacement per atom) using 4.8 MeV protons at 300 degrees C. The maximum attack in the EPR test for the irradiated desensitized SS was measured at a depth of 70 mu m from the surface. Grain boundaries and twin boundaries got attacked and pit-like features within the grains were observed after the EPR test at the depth of 70 mu m. The depth of attack, as measured by AFM, was higher at grain boundaries and pit-like features as compared to twin boundaries. It has been shown that the chromium depletion due to RIS takes place at the carbide-matrix as well as at the carbide-carbide interfaces at grain boundaries. The width of attack at grain boundaries after the EPR test of the irradiated desensitized specimen appeared larger due to the dislodgement of carbides at grain boundaries. (C) 2011 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2012-06-26T07:23:05Z
2012-06-26T07:23:05Z
2011
 
Type Article
 
Identifier JOURNAL OF NUCLEAR MATERIALS,416(3)335-344
0022-3115
http://dx.doi.org/10.1016/j.jnucmat.2011.06.024
http://dspace.library.iitb.ac.in/jspui/handle/100/14125
 
Language English