Scc initiation in the machined austenitic stainless steel 316L in simulated PWR primary water

Litao Chang; Jonathan Duff; M. Grace Burke; Fabio Scenini

doi:10.1007/978-3-030-04639-2_52

Scc initiation in the machined austenitic stainless steel 316L in simulated PWR primary water

Litao Chang^*, Jonathan Duff, M. Grace Burke, Fabio Scenini

^*Corresponding author for this work

Research output: Chapter in Book/Conference proceeding › Conference contribution › peer-review

Abstract

Annealed and cold-worked stainless steel 316L samples with machined and polished surfaces were tested in simulated pressurized water reactor (PWR) primary water under slow strain rate tensile (SSRT) test conditions to investigate stress corrosion cracking (SCC) initiation. Roughness, residual stress and cross-sectional microstructure of the as-machined samples were characterized before SSRT tests. Plan view and cross-sectional examinations were performed after the test. Pre-test characterization indicated that a deformation layer was present on the machined surfaces. This deformation layer consisted of an ultrafine-grained layer on the top and deformation bands underneath. The thickness of the deformation layer on the annealed material was greater than that on the cold-worked material. Post-test characterization revealed that the SCC initiation behaviors of the as-machined and polished surfaces were different for both annealed and cold-worked materials. Machining increased SCC initiation susceptibility of the annealed material as many shallow cracks initiated along the machining marks in the machined surface, and it decreased the SCC initiation susceptibility of the cold-worked material as a reduced number of cracks were identified in the machined surface compared to the polished surface. The factors influencing SCC initiation are also discussed.

Original language	English
Title of host publication	Minerals, Metals and Materials Series
Publisher	Springer Nature
Pages	811-827
Number of pages	17
ISBN (Print)	9783030046385, 9783030046392, 9783319515403, 9783319651354, 9783319728520, 9783319950211
DOIs	https://doi.org/10.1007/978-3-030-04639-2_52
Publication status	Published - 2019
Event	18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019 - Boston, United States Duration: 18 Aug 2019 → 22 Aug 2019

Publication series

Name	Minerals, Metals and Materials Series
ISSN (Print)	2367-1181
ISSN (Electronic)	2367-1696

Conference

Conference	18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019
Country/Territory	United States
City	Boston
Period	18/08/19 → 22/08/19

Keywords

Machining
Oxide layer
Stainless steel
Stress corrosion cracking
Ultrafine grain

Access to Document

10.1007/978-3-030-04639-2_52

Cite this

@inproceedings{0219e8d7590c403696830b189ae28ffe,

title = "Scc initiation in the machined austenitic stainless steel 316L in simulated PWR primary water",

abstract = "Annealed and cold-worked stainless steel 316L samples with machined and polished surfaces were tested in simulated pressurized water reactor (PWR) primary water under slow strain rate tensile (SSRT) test conditions to investigate stress corrosion cracking (SCC) initiation. Roughness, residual stress and cross-sectional microstructure of the as-machined samples were characterized before SSRT tests. Plan view and cross-sectional examinations were performed after the test. Pre-test characterization indicated that a deformation layer was present on the machined surfaces. This deformation layer consisted of an ultrafine-grained layer on the top and deformation bands underneath. The thickness of the deformation layer on the annealed material was greater than that on the cold-worked material. Post-test characterization revealed that the SCC initiation behaviors of the as-machined and polished surfaces were different for both annealed and cold-worked materials. Machining increased SCC initiation susceptibility of the annealed material as many shallow cracks initiated along the machining marks in the machined surface, and it decreased the SCC initiation susceptibility of the cold-worked material as a reduced number of cracks were identified in the machined surface compared to the polished surface. The factors influencing SCC initiation are also discussed.",

keywords = "Machining, Oxide layer, Stainless steel, Stress corrosion cracking, Ultrafine grain",

author = "Litao Chang and Jonathan Duff and Burke, {M. Grace} and Fabio Scenini",

note = "Publisher Copyright: {\textcopyright} 2019, The Minerals, Metals & Materials Society.; 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019 ; Conference date: 18-08-2019 Through 22-08-2019",

year = "2019",

doi = "10.1007/978-3-030-04639-2_52",

language = "English",

isbn = "9783030046385",

series = "Minerals, Metals and Materials Series",

publisher = "Springer Nature",

pages = "811--827",

booktitle = "Minerals, Metals and Materials Series",

address = "United States",

}

Chang, L, Duff, J , Burke, MG & Scenini, F 2019, Scc initiation in the machined austenitic stainless steel 316L in simulated PWR primary water. in Minerals, Metals and Materials Series. Minerals, Metals and Materials Series, Springer Nature, pp. 811-827, 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019, Boston, United States, 18/08/19. https://doi.org/10.1007/978-3-030-04639-2_52

TY - GEN

T1 - Scc initiation in the machined austenitic stainless steel 316L in simulated PWR primary water

AU - Chang, Litao

AU - Duff, Jonathan

AU - Burke, M. Grace

AU - Scenini, Fabio

PY - 2019

Y1 - 2019

N2 - Annealed and cold-worked stainless steel 316L samples with machined and polished surfaces were tested in simulated pressurized water reactor (PWR) primary water under slow strain rate tensile (SSRT) test conditions to investigate stress corrosion cracking (SCC) initiation. Roughness, residual stress and cross-sectional microstructure of the as-machined samples were characterized before SSRT tests. Plan view and cross-sectional examinations were performed after the test. Pre-test characterization indicated that a deformation layer was present on the machined surfaces. This deformation layer consisted of an ultrafine-grained layer on the top and deformation bands underneath. The thickness of the deformation layer on the annealed material was greater than that on the cold-worked material. Post-test characterization revealed that the SCC initiation behaviors of the as-machined and polished surfaces were different for both annealed and cold-worked materials. Machining increased SCC initiation susceptibility of the annealed material as many shallow cracks initiated along the machining marks in the machined surface, and it decreased the SCC initiation susceptibility of the cold-worked material as a reduced number of cracks were identified in the machined surface compared to the polished surface. The factors influencing SCC initiation are also discussed.

AB - Annealed and cold-worked stainless steel 316L samples with machined and polished surfaces were tested in simulated pressurized water reactor (PWR) primary water under slow strain rate tensile (SSRT) test conditions to investigate stress corrosion cracking (SCC) initiation. Roughness, residual stress and cross-sectional microstructure of the as-machined samples were characterized before SSRT tests. Plan view and cross-sectional examinations were performed after the test. Pre-test characterization indicated that a deformation layer was present on the machined surfaces. This deformation layer consisted of an ultrafine-grained layer on the top and deformation bands underneath. The thickness of the deformation layer on the annealed material was greater than that on the cold-worked material. Post-test characterization revealed that the SCC initiation behaviors of the as-machined and polished surfaces were different for both annealed and cold-worked materials. Machining increased SCC initiation susceptibility of the annealed material as many shallow cracks initiated along the machining marks in the machined surface, and it decreased the SCC initiation susceptibility of the cold-worked material as a reduced number of cracks were identified in the machined surface compared to the polished surface. The factors influencing SCC initiation are also discussed.

KW - Machining

KW - Oxide layer

KW - Stainless steel

KW - Stress corrosion cracking

KW - Ultrafine grain

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U2 - 10.1007/978-3-030-04639-2_52

DO - 10.1007/978-3-030-04639-2_52

M3 - Conference contribution

AN - SCOPUS:85064065521

SN - 9783030046385

SN - 9783030046392

SN - 9783319515403

SN - 9783319651354

SN - 9783319728520

SN - 9783319950211

T3 - Minerals, Metals and Materials Series

SP - 811

EP - 827

BT - Minerals, Metals and Materials Series

PB - Springer Nature

T2 - 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019

Y2 - 18 August 2019 through 22 August 2019

ER -

Scc initiation in the machined austenitic stainless steel 316L in simulated PWR primary water

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Keywords

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