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Title: Influence of thermal aging on the intergranular corrosion resistance of types 304LN and 316LN stainless steels

Abstract

Intergranular corrosion (IGC) resistance of types 304LN and 316LN stainless steels (SS) thermally aged at 823, 873, and 923 K for various durations was assessed by ASTM A262 practice A test (electrolytic etch test) and electrochemical potentiodynamic reactivation (EPR) test. The results indicated that the type 316LN SS has significantly improved IGC resistance compared to 304LN SS. Based on the results of these tests, time-temperature-sensitization (TTS) diagrams were developed for both alloys. The secondary precipitates formed during thermal aging treatments were electrochemically extracted and analyzed by X-ray diffraction (XRD) to determine the types of precipitates formed during the aging treatments. The results indicated that the precipitates were mostly of M{sub 23}C{sub 6} carbides.

Authors:
; ; ;  [1]
  1. Indira Gandhi Centre for Atomic Research, Kalpakkam (India)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
417848
Resource Type:
Journal Article
Journal Name:
Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science
Additional Journal Information:
Journal Volume: 27; Journal Issue: 10; Other Information: PBD: Oct 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS; STAINLESS STEELS; AGING; CORROSION RESISTANCE; FBR TYPE REACTORS; REACTOR MATERIALS; CHEMICAL COMPOSITION; HEAT TREATMENTS; QUENCHING; PRECIPITATION; X-RAY DIFFRACTION; CARBIDES; ELECTROCHEMICAL CORROSION; INTERGRANULAR CORROSION

Citation Formats

Mudali, U K, Dayal, R K, Gnanamoorthy, J B, and Rodriguez, P. Influence of thermal aging on the intergranular corrosion resistance of types 304LN and 316LN stainless steels. United States: N. p., 1996. Web. doi:10.1007/BF02663836.
Mudali, U K, Dayal, R K, Gnanamoorthy, J B, & Rodriguez, P. Influence of thermal aging on the intergranular corrosion resistance of types 304LN and 316LN stainless steels. United States. doi:10.1007/BF02663836.
Mudali, U K, Dayal, R K, Gnanamoorthy, J B, and Rodriguez, P. Tue . "Influence of thermal aging on the intergranular corrosion resistance of types 304LN and 316LN stainless steels". United States. doi:10.1007/BF02663836.
@article{osti_417848,
title = {Influence of thermal aging on the intergranular corrosion resistance of types 304LN and 316LN stainless steels},
author = {Mudali, U K and Dayal, R K and Gnanamoorthy, J B and Rodriguez, P},
abstractNote = {Intergranular corrosion (IGC) resistance of types 304LN and 316LN stainless steels (SS) thermally aged at 823, 873, and 923 K for various durations was assessed by ASTM A262 practice A test (electrolytic etch test) and electrochemical potentiodynamic reactivation (EPR) test. The results indicated that the type 316LN SS has significantly improved IGC resistance compared to 304LN SS. Based on the results of these tests, time-temperature-sensitization (TTS) diagrams were developed for both alloys. The secondary precipitates formed during thermal aging treatments were electrochemically extracted and analyzed by X-ray diffraction (XRD) to determine the types of precipitates formed during the aging treatments. The results indicated that the precipitates were mostly of M{sub 23}C{sub 6} carbides.},
doi = {10.1007/BF02663836},
journal = {Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science},
number = 10,
volume = 27,
place = {United States},
year = {1996},
month = {10}
}