Low-temperature (400-500°C) annealing (LTA) treatments were carried out on Type 304SS, which had been irradiated to fast neutron fluences from 1.74 to 2.95 x 1021 n/cm2 (E > 1 MeV). The purpose of these treatments was to restore the stress-corrosion cracking (SCC) resistance of the unirradiated material. Certain treatments which were conducted at high enough temperatures and long enough times were successful in restoring part or all of the pre-irradiation SCC and hardness properties. Complete restoration of the SCC properties was observed before that of the pre-irradiation hardness. Stress-corrosion resistance was measured in constant extension rate tensile (CERT) and constant deflection tests. The effectiveness of a given LTA treatment was found to depend on the type of SCC test.

Subject
Materials, Intergranular stress corrosion cracking, Irradiation, Irradiation assisted stress corrosion cracking, Constants, Deflection, Sensitization, Stainless steel, Hardness, Annealing, Heat treatment, Stress corrosion cracking, Test specimen
Keywords:
bent beams, boiling water reactor, constant deflection, constant extension rate tensile tests, fast neutron fluence, hardness, irradiation-assisted stress corrosion cracking, low-temperature annealing, sensitization, threshold fluence
© 1995 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1995
Association for Materials Protection and Performance (AMPP)
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