PSI - Issue 23

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000

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ScienceDirect

Procedia Structural Integrity 23 (2019) 425–430

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers © 201 9 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. Rectangular spe imens made of austenitic stainl ss st el 08Ch18N10T were cold-pressed to different levels of thickness redu ti in order t induce various wo k har ening i the material. Hardness was measured on each specimen to study its dependence on the l vel of wo k-hardeni g pre- nd post-annealing at 700 °C. The depe dence of hardness on the time spent in furnace was also stud ed to bett r u erstand anomalous b havi r of this material when an aled at 700 °C. The results of this study are in ine with previous studies and show that the d crease of hardness of work-hardened specimens when anneal at 700 °C is smaller than when annealed at different temperatures in range 550-900 °C. The experimental work was accompanied by numerical simulations using the finite element method (FEM). The numerical imulation are used to select an optimal place on the surface of the annealed specimen for hardness measurements to achieve consistent results. © 201 9 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 9th International Conference on Materials Structure and Micromechanics of Fracture Effects of cold-working and annealing at 700 °C on hardness of 08Ch18N10T steel Aleš Materna a, *, Petr Haušild a , Jan Ondráček a , Jan Adámek a , Petra Petelová b a Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Trojanova 13, 120 00 Praha 2, Czech Republic b UJV Řež, a.s., Hlavní 130, Řež, 250 68 Husinec, Czech Republic 9th International Conference on Materials Structure and Micromechanics of Fracture Effects of cold-working and annealing at 700 °C on hardness of 08Ch18N10T steel Aleš Materna a, *, Petr Haušild a , Jan Ondráček a , Jan Adámek a , Petra Petelová b a Czech Technical University in Prague, Faculty of Nucle r Sciences and Physical E gineering, Trojanova 13, 120 00 Praha 2, Czech Republic b UJV Řež, a.s., Hlavní 130, Řež, 250 68 Husinec, Czech Republic Abstract Abstract Rectangular specimens made of austenitic stainless steel 08Ch18N10T were cold-pressed to different levels of thickness reduction in order to induce various work-hardening in the material. Hardness was measured on each specimen to study its dependence on the level of work-hardening pre- and post-annealing at 700 °C. The dependence of hardness on the time spent in furnace was also studied to better understand anomalous behavior of this material when annealed at 700 °C. The results of this study are in line with previous studies and show that the decrease of hardness of work-hardened specimens when annealed at 700 °C is smaller than when annealed at different temperatures in range 550-900 °C. The experimental work was accompanied by numerical simulations using the finite element method (FEM). The numerical simulations are used to select an optimal place on the surface of the annealed specimen for hardness measurements to achieve consistent results.

Keywords: austenitic stainless steel; cold working; annealing; microstructure; hardness; FEM Keywords: austenitic stainless steel; cold working; annealing; microstructure; hardness; FEM

1. Introduction 1. Introduction

Radiation embrittlement of key parts of pressurized water reactors is a limiting factor for safe operation of nuclear power plants. Post-irradiation annealing at proper condition can result in partial to nearly full embrittlement recovery, which can be monitored by the hardness measurement. The presented work is a part of a project with an objective to Radiation embrittlement of key parts of essurize water reactors is a limiting factor or safe operatio of nuclear power plants. P st-irra iation annealing at proper co dition can r sult in partial to nearly full embrittlement r o ry, which can be monitored by the hardness measurement. The presented work is a part of a project with an objective to

* Corresponding author. Tel.: +420-224-358-815; fax: 420-224-358-823. E-mail address: ales.materna@fjfi.cvut.cz * Correspon ing author. T l.: +420-224-358-815; fax: 420-224-358-823. E-mail address: ales.materna@fjfi.cvut.cz

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the scientific committee of the IC MSMF organizers.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers 10.1016/j.prostr.2020.01.124