Electrochemical evaluation of radiation-induced segregation in austenitic stainless steels with oversize solute addition

Parag M. Ahmedabadi; V. Kain; M. Gupta; I. Samajdar; S. Sharma; P. Bhagwat; Y. Watanabe

doi:10.1007/s11665-012-0201-8

Electrochemical evaluation of radiation-induced segregation in austenitic stainless steels with oversize solute addition

Parag M. Ahmedabadi, V. Kain, M. Gupta, I. Samajdar, S. Sharma, P. Bhagwat, Y. Watanabe

ENG - Quantum Science and Energy Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Effect of different levels of oversize element, cerium, on radiation-induced segregation (RIS) in type 316 stainless steel was investigated. The effect of prior cold-work on RIS was also investigated. Samples with 0.00, 0.01, and 0.04 wt.% cerium were irradiated to 0.70 dpa using 4.8 MeV protons at 300 °C. Characterization of proton-irradiated specimens was carried out using electrochemical potentiokinetic reactivation (EPR) test followed by atomic force microscopic examination. The specimen with prior cold-work (without cerium addition) showed the lowest EPR values indicating the lowest chromium depletion in this material. The specimen with 0.04 wt.% cerium showed the lower EPR value as compared to the specimen with 0.01 wt.% Ce. The irradiated specimen with prior cold-work showed linear features after the EPR tests and such features were attributed to decoration of dislocations, generated due to prior cold-work, by point defects produced during irradiation. The resistance to RIS offered by cold-work (linear features) has been more effective as compared to that by the addition of oversize solute addition.

Original language	English
Pages (from-to)	2472-2479
Number of pages	8
Journal	Journal of Materials Engineering and Performance
Volume	21
Issue number	11
DOIs	https://doi.org/10.1007/s11665-012-0201-8
Publication status	Published - 2012 Nov

Keywords

Atomic force microscopy
Austenitic stainless steel
Cold-work
Electrochemical potentiokinetic reactivation
Oversize solute
Proton-irradiation

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1007/s11665-012-0201-8

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Electrochemical evaluation of radiation-induced segregation in austenitic stainless steels with oversize solute addition. / Ahmedabadi, Parag M.; Kain, V.; Gupta, M.; Samajdar, I.; Sharma, S.; Bhagwat, P.; Watanabe, Y.

In: Journal of Materials Engineering and Performance, Vol. 21, No. 11, 11.2012, p. 2472-2479.

Research output: Contribution to journal › Article › peer-review

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abstract = "Effect of different levels of oversize element, cerium, on radiation-induced segregation (RIS) in type 316 stainless steel was investigated. The effect of prior cold-work on RIS was also investigated. Samples with 0.00, 0.01, and 0.04 wt.% cerium were irradiated to 0.70 dpa using 4.8 MeV protons at 300 °C. Characterization of proton-irradiated specimens was carried out using electrochemical potentiokinetic reactivation (EPR) test followed by atomic force microscopic examination. The specimen with prior cold-work (without cerium addition) showed the lowest EPR values indicating the lowest chromium depletion in this material. The specimen with 0.04 wt.% cerium showed the lower EPR value as compared to the specimen with 0.01 wt.% Ce. The irradiated specimen with prior cold-work showed linear features after the EPR tests and such features were attributed to decoration of dislocations, generated due to prior cold-work, by point defects produced during irradiation. The resistance to RIS offered by cold-work (linear features) has been more effective as compared to that by the addition of oversize solute addition.",

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AU - Ahmedabadi, Parag M.

AU - Kain, V.

AU - Gupta, M.

AU - Samajdar, I.

AU - Sharma, S.

AU - Bhagwat, P.

AU - Watanabe, Y.

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AB - Effect of different levels of oversize element, cerium, on radiation-induced segregation (RIS) in type 316 stainless steel was investigated. The effect of prior cold-work on RIS was also investigated. Samples with 0.00, 0.01, and 0.04 wt.% cerium were irradiated to 0.70 dpa using 4.8 MeV protons at 300 °C. Characterization of proton-irradiated specimens was carried out using electrochemical potentiokinetic reactivation (EPR) test followed by atomic force microscopic examination. The specimen with prior cold-work (without cerium addition) showed the lowest EPR values indicating the lowest chromium depletion in this material. The specimen with 0.04 wt.% cerium showed the lower EPR value as compared to the specimen with 0.01 wt.% Ce. The irradiated specimen with prior cold-work showed linear features after the EPR tests and such features were attributed to decoration of dislocations, generated due to prior cold-work, by point defects produced during irradiation. The resistance to RIS offered by cold-work (linear features) has been more effective as compared to that by the addition of oversize solute addition.

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KW - Electrochemical potentiokinetic reactivation

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KW - Proton-irradiation

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Electrochemical evaluation of radiation-induced segregation in austenitic stainless steels with oversize solute addition

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