The Effect of Electrolytic Hydrogenation on Mechanical Properties of T92 Steel Weldments under Different PWHT Conditions
In the present work, the effects of electrolytic hydrogen charging of T92 steel weldments on their room-temperature tensile properties were investigated. Two circumferential weldments between the T92 grade tubes were produced by gas tungsten arc welding using the matching Thermanit MTS 616 filler ma...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-08-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/13/16/3653 |
| _version_ | 1797557282918105088 |
|---|---|
| author | Lucia Čiripová Ladislav Falat Viera Homolová Miroslav Džupon Róbert Džunda Ivo Dlouhý |
| author_facet | Lucia Čiripová Ladislav Falat Viera Homolová Miroslav Džupon Róbert Džunda Ivo Dlouhý |
| author_sort | Lucia Čiripová |
| collection | DOAJ |
| description | In the present work, the effects of electrolytic hydrogen charging of T92 steel weldments on their room-temperature tensile properties were investigated. Two circumferential weldments between the T92 grade tubes were produced by gas tungsten arc welding using the matching Thermanit MTS 616 filler material. The produced weldments were individually subjected to considerably differing post-welding heat treatment (PWHT) procedures. The first-produced weldment was conventionally tempered (i.e., short-term annealed below the Ac<sub>1</sub> critical transformation temperature of the T92 steel), whereas the second one was subjected to its full renormalization (i.e., appropriate reaustenitization well above the T92 steel Ac<sub>3</sub> critical transformation temperature and subsequent air cooling), followed by its conventional subcritical tempering. From both weldments, cylindrical tensile specimens of cross-weld configuration were machined. The room-temperature tensile tests were performed for the individual welds’ PWHT states in both hydrogen-free and electrolytically hydrogen-charged conditions. The results indicated higher hydrogen embrittlement susceptibility for the renormalized-and-tempered weldments, compared to the conventionally tempered ones. The obtained findings were correlated with performed microstructural and fractographic observations. |
| first_indexed | 2024-03-10T17:14:56Z |
| format | Article |
| id | doaj.art-26d02afabee643b9b054592b0cbcbdec |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T17:14:56Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-26d02afabee643b9b054592b0cbcbdec2023-11-20T10:31:58ZengMDPI AGMaterials1996-19442020-08-011316365310.3390/ma13163653The Effect of Electrolytic Hydrogenation on Mechanical Properties of T92 Steel Weldments under Different PWHT ConditionsLucia Čiripová0Ladislav Falat1Viera Homolová2Miroslav Džupon3Róbert Džunda4Ivo Dlouhý5Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04001 Košice, SlovakiaInstitute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04001 Košice, SlovakiaInstitute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04001 Košice, SlovakiaInstitute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04001 Košice, SlovakiaInstitute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04001 Košice, SlovakiaInstitute of Physics of Materials, CEITEC-IPM, Czech Academy of Sciences, Zizkova 22, 61662 Brno, Czech RepublicIn the present work, the effects of electrolytic hydrogen charging of T92 steel weldments on their room-temperature tensile properties were investigated. Two circumferential weldments between the T92 grade tubes were produced by gas tungsten arc welding using the matching Thermanit MTS 616 filler material. The produced weldments were individually subjected to considerably differing post-welding heat treatment (PWHT) procedures. The first-produced weldment was conventionally tempered (i.e., short-term annealed below the Ac<sub>1</sub> critical transformation temperature of the T92 steel), whereas the second one was subjected to its full renormalization (i.e., appropriate reaustenitization well above the T92 steel Ac<sub>3</sub> critical transformation temperature and subsequent air cooling), followed by its conventional subcritical tempering. From both weldments, cylindrical tensile specimens of cross-weld configuration were machined. The room-temperature tensile tests were performed for the individual welds’ PWHT states in both hydrogen-free and electrolytically hydrogen-charged conditions. The results indicated higher hydrogen embrittlement susceptibility for the renormalized-and-tempered weldments, compared to the conventionally tempered ones. The obtained findings were correlated with performed microstructural and fractographic observations.https://www.mdpi.com/1996-1944/13/16/3653grade 92 steel weldmentpost-welding heat treatmenttensile straininghydrogen embrittlementmetallography and fractography |
| spellingShingle | Lucia Čiripová Ladislav Falat Viera Homolová Miroslav Džupon Róbert Džunda Ivo Dlouhý The Effect of Electrolytic Hydrogenation on Mechanical Properties of T92 Steel Weldments under Different PWHT Conditions Materials grade 92 steel weldment post-welding heat treatment tensile straining hydrogen embrittlement metallography and fractography |
| title | The Effect of Electrolytic Hydrogenation on Mechanical Properties of T92 Steel Weldments under Different PWHT Conditions |
| title_full | The Effect of Electrolytic Hydrogenation on Mechanical Properties of T92 Steel Weldments under Different PWHT Conditions |
| title_fullStr | The Effect of Electrolytic Hydrogenation on Mechanical Properties of T92 Steel Weldments under Different PWHT Conditions |
| title_full_unstemmed | The Effect of Electrolytic Hydrogenation on Mechanical Properties of T92 Steel Weldments under Different PWHT Conditions |
| title_short | The Effect of Electrolytic Hydrogenation on Mechanical Properties of T92 Steel Weldments under Different PWHT Conditions |
| title_sort | effect of electrolytic hydrogenation on mechanical properties of t92 steel weldments under different pwht conditions |
| topic | grade 92 steel weldment post-welding heat treatment tensile straining hydrogen embrittlement metallography and fractography |
| url | https://www.mdpi.com/1996-1944/13/16/3653 |
| work_keys_str_mv | AT luciaciripova theeffectofelectrolytichydrogenationonmechanicalpropertiesoft92steelweldmentsunderdifferentpwhtconditions AT ladislavfalat theeffectofelectrolytichydrogenationonmechanicalpropertiesoft92steelweldmentsunderdifferentpwhtconditions AT vierahomolova theeffectofelectrolytichydrogenationonmechanicalpropertiesoft92steelweldmentsunderdifferentpwhtconditions AT miroslavdzupon theeffectofelectrolytichydrogenationonmechanicalpropertiesoft92steelweldmentsunderdifferentpwhtconditions AT robertdzunda theeffectofelectrolytichydrogenationonmechanicalpropertiesoft92steelweldmentsunderdifferentpwhtconditions AT ivodlouhy theeffectofelectrolytichydrogenationonmechanicalpropertiesoft92steelweldmentsunderdifferentpwhtconditions AT luciaciripova effectofelectrolytichydrogenationonmechanicalpropertiesoft92steelweldmentsunderdifferentpwhtconditions AT ladislavfalat effectofelectrolytichydrogenationonmechanicalpropertiesoft92steelweldmentsunderdifferentpwhtconditions AT vierahomolova effectofelectrolytichydrogenationonmechanicalpropertiesoft92steelweldmentsunderdifferentpwhtconditions AT miroslavdzupon effectofelectrolytichydrogenationonmechanicalpropertiesoft92steelweldmentsunderdifferentpwhtconditions AT robertdzunda effectofelectrolytichydrogenationonmechanicalpropertiesoft92steelweldmentsunderdifferentpwhtconditions AT ivodlouhy effectofelectrolytichydrogenationonmechanicalpropertiesoft92steelweldmentsunderdifferentpwhtconditions |