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Physical Properties of a High-Strength Austenitic Stainless Steel for the Precompression Structure of the ITER Central Solenoid

The ITER central solenoid (CS) consists of six independent coils kept together by a precompression support structure that must react vertical tensile loads and provide sufficient preload to maintain coil-to-coil contact when the solenoid is energized. The CS precompression system includes tie plates...

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Autores principales: Sgobba, Stefano, Langeslag, Stefanie Agnes Elisabeth, Arauzo, Ana, Roussel, Pascal, Libeyre, Paul
Lenguaje:eng
Publicado: 2016
Materias:
Acceso en línea:https://dx.doi.org/10.1109/TASC.2016.2535388
http://cds.cern.ch/record/2268398
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author Sgobba, Stefano
Langeslag, Stefanie Agnes Elisabeth
Arauzo, Ana
Roussel, Pascal
Libeyre, Paul
author_facet Sgobba, Stefano
Langeslag, Stefanie Agnes Elisabeth
Arauzo, Ana
Roussel, Pascal
Libeyre, Paul
author_sort Sgobba, Stefano
collection CERN
description The ITER central solenoid (CS) consists of six independent coils kept together by a precompression support structure that must react vertical tensile loads and provide sufficient preload to maintain coil-to-coil contact when the solenoid is energized. The CS precompression system includes tie plates, lower and upper key blocks, load distribution and isolation plates and other attachment, support and insulating hardware. The tie plates operating at 4 K are manufactured starting from forgings in a high-strength austenitic stainless steel (FXM-19) with a stringent specification. Moreover, forged components for the lower and upper key blocks have to be provided in the same FXM-19 grade with comparably strict requirements. FXM-19 is a high-nitrogen austenitic stainless steel, featuring high strength and toughness, ready weldability, and forgeability. It features as well higher integral thermal contraction down to 4 K compared with the very high Mn steel grade selected for the CS coil jackets, hence providing an additional precompression of the CS modules during cooling down. The results of an extensive characterization of the physical properties of FXM-19, extended down to 4 K or lower, are reported here. The provided results allow requirements for the file for new materials described in French code RCC-MRx to be fulfilled, as well as to complete the material properties in the ITER database, where measurements were reported for room temperature and above only.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
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spelling oai-inspirehep.net-16030392019-09-30T06:29:59Zdoi:10.1109/TASC.2016.2535388http://cds.cern.ch/record/2268398engSgobba, StefanoLangeslag, Stefanie Agnes ElisabethArauzo, AnaRoussel, PascalLibeyre, PaulPhysical Properties of a High-Strength Austenitic Stainless Steel for the Precompression Structure of the ITER Central SolenoidDetectors and Experimental TechniquesThe ITER central solenoid (CS) consists of six independent coils kept together by a precompression support structure that must react vertical tensile loads and provide sufficient preload to maintain coil-to-coil contact when the solenoid is energized. The CS precompression system includes tie plates, lower and upper key blocks, load distribution and isolation plates and other attachment, support and insulating hardware. The tie plates operating at 4 K are manufactured starting from forgings in a high-strength austenitic stainless steel (FXM-19) with a stringent specification. Moreover, forged components for the lower and upper key blocks have to be provided in the same FXM-19 grade with comparably strict requirements. FXM-19 is a high-nitrogen austenitic stainless steel, featuring high strength and toughness, ready weldability, and forgeability. It features as well higher integral thermal contraction down to 4 K compared with the very high Mn steel grade selected for the CS coil jackets, hence providing an additional precompression of the CS modules during cooling down. The results of an extensive characterization of the physical properties of FXM-19, extended down to 4 K or lower, are reported here. The provided results allow requirements for the file for new materials described in French code RCC-MRx to be fulfilled, as well as to complete the material properties in the ITER database, where measurements were reported for room temperature and above only.oai:inspirehep.net:16030392016
spellingShingle Detectors and Experimental Techniques
Sgobba, Stefano
Langeslag, Stefanie Agnes Elisabeth
Arauzo, Ana
Roussel, Pascal
Libeyre, Paul
Physical Properties of a High-Strength Austenitic Stainless Steel for the Precompression Structure of the ITER Central Solenoid
title Physical Properties of a High-Strength Austenitic Stainless Steel for the Precompression Structure of the ITER Central Solenoid
title_full Physical Properties of a High-Strength Austenitic Stainless Steel for the Precompression Structure of the ITER Central Solenoid
title_fullStr Physical Properties of a High-Strength Austenitic Stainless Steel for the Precompression Structure of the ITER Central Solenoid
title_full_unstemmed Physical Properties of a High-Strength Austenitic Stainless Steel for the Precompression Structure of the ITER Central Solenoid
title_short Physical Properties of a High-Strength Austenitic Stainless Steel for the Precompression Structure of the ITER Central Solenoid
title_sort physical properties of a high-strength austenitic stainless steel for the precompression structure of the iter central solenoid
topic Detectors and Experimental Techniques
url https://dx.doi.org/10.1109/TASC.2016.2535388
http://cds.cern.ch/record/2268398
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