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Effect of machining on stress corrosion crack initiation in warm-forged type 304L stainless steel in high temperature water

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posted on 2024-10-01, 11:26 authored by Litao Chang, Liberato Volpe, Yong Liang Wang, M Grace Burke, Agostino Maurotto, David Tice, Sergio Lozano-Perez, Fabio Scenini
Warm-forged Type 304L stainless steel specimens have been tested in high temperature hydrogenated water under slow strain rate tensile test conditions to investigate the effect of machining on stress corrosion crack initiation. Roughness, residual stress and cross-section microstructures of the as-machined surfaces were characterized prior to the tests, and both plan-view and cross-section examinations were performed post-test. The results indicated that machining produced a deformation layer characterized by an ultrafine-grained outer layer and a highly deformed inner layer. The ultrafine-grained layer promoted a more uniform oxidation and enhanced SCC initiation resistance of the material compared to the highly polished deformation-free surfaces, which initiated significantly more intergranular cracks. The mechanisms for SCC initiation in the material have been discussed.

Funding

New Nuclear Manufacturing (NNUMAN grant EP/JO21172/1 )

Understanding the mechanisms controlling low potential stress corrosion cracking in nuclear reactors

Engineering and Physical Sciences Research Council

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History

Citation

L. Chang, et al. Effect of machining on stress corrosion crack initiation in warm-forged type 304L stainless steel in high temperature water Acta Mater, 165 (2019), pp. 203-214

Author affiliation

College of Science & Engineering/Engineering

Version

  • VoR (Version of Record)

Published in

Acta Materialia

Volume

165

Pagination

203 - 214

Publisher

Elsevier BV

issn

1359-6454

eissn

1873-2453

Acceptance date

2022-01-02

Copyright date

2022

Available date

2024-10-01

Language

en

Deposited by

Dr Agostino Maurotto

Deposit date

2024-08-30

Rights Retention Statement

  • No

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