Effects of boron addition on the microstructure and creep properties of a Ni-Fe-based superalloy weld metal alloy
The role of boron in the creep properties and grain boundary characteristics in a new Ni-Fe-based weld metal suitable for advanced ultra-supercritical (A-USC) coal-fired power plant applications has been investigated. Ni-Fe-based filler wires without boron and boron-doped (50 ppm wt% boron) were pre...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2022-01-01
|
| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ac5078 |
| _version_ | 1797746620131966976 |
|---|---|
| author | Wencai Xie Dong Wu Shanping Lu |
| author_facet | Wencai Xie Dong Wu Shanping Lu |
| author_sort | Wencai Xie |
| collection | DOAJ |
| description | The role of boron in the creep properties and grain boundary characteristics in a new Ni-Fe-based weld metal suitable for advanced ultra-supercritical (A-USC) coal-fired power plant applications has been investigated. Ni-Fe-based filler wires without boron and boron-doped (50 ppm wt% boron) were prepared for this study. Boron-doped weld metals exhibited longer rupture lives and lower steady creep rates during the creep rupture tests at 750 °C / 380 MPa and 750 °C / 210 MPa. This study explains the improvement mechanism of boron on creep resistance from the perspective of the effect of boron on M _23 C _6 . Boron increased the nucleation rate of M _23 C _6 and participated in the formation of M _23 (C, B) _6 type boron-carbides. After creep deformation, boron still existed stably in the M _23 (C, B) _6 . The higher density of discrete M _23 C _6 particles due to boron addition could restrain grain boundary crack propagation and grain boundary sliding, and thereby improve the creep fracture resistance of the GH984G weld metal at 750 °C / (380/ 210 MPa). |
| first_indexed | 2024-03-12T15:40:26Z |
| format | Article |
| id | doaj.art-adce00aa70244d61a501c2a7756f9adf |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:40:26Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-adce00aa70244d61a501c2a7756f9adf2023-08-09T16:01:43ZengIOP PublishingMaterials Research Express2053-15912022-01-019202652210.1088/2053-1591/ac5078Effects of boron addition on the microstructure and creep properties of a Ni-Fe-based superalloy weld metal alloyWencai Xie0Dong Wu1Shanping Lu2https://orcid.org/0000-0002-8346-9175Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, People’s Republic of China; School of Materials Science and Engineering, University of Science and Technology of China , Shenyang, 110016, People’s Republic of ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, People’s Republic of ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, People’s Republic of ChinaThe role of boron in the creep properties and grain boundary characteristics in a new Ni-Fe-based weld metal suitable for advanced ultra-supercritical (A-USC) coal-fired power plant applications has been investigated. Ni-Fe-based filler wires without boron and boron-doped (50 ppm wt% boron) were prepared for this study. Boron-doped weld metals exhibited longer rupture lives and lower steady creep rates during the creep rupture tests at 750 °C / 380 MPa and 750 °C / 210 MPa. This study explains the improvement mechanism of boron on creep resistance from the perspective of the effect of boron on M _23 C _6 . Boron increased the nucleation rate of M _23 C _6 and participated in the formation of M _23 (C, B) _6 type boron-carbides. After creep deformation, boron still existed stably in the M _23 (C, B) _6 . The higher density of discrete M _23 C _6 particles due to boron addition could restrain grain boundary crack propagation and grain boundary sliding, and thereby improve the creep fracture resistance of the GH984G weld metal at 750 °C / (380/ 210 MPa).https://doi.org/10.1088/2053-1591/ac5078superalloyweld metalcreepboronM23(CB)6 |
| spellingShingle | Wencai Xie Dong Wu Shanping Lu Effects of boron addition on the microstructure and creep properties of a Ni-Fe-based superalloy weld metal alloy Materials Research Express superalloy weld metal creep boron M23(C B)6 |
| title | Effects of boron addition on the microstructure and creep properties of a Ni-Fe-based superalloy weld metal alloy |
| title_full | Effects of boron addition on the microstructure and creep properties of a Ni-Fe-based superalloy weld metal alloy |
| title_fullStr | Effects of boron addition on the microstructure and creep properties of a Ni-Fe-based superalloy weld metal alloy |
| title_full_unstemmed | Effects of boron addition on the microstructure and creep properties of a Ni-Fe-based superalloy weld metal alloy |
| title_short | Effects of boron addition on the microstructure and creep properties of a Ni-Fe-based superalloy weld metal alloy |
| title_sort | effects of boron addition on the microstructure and creep properties of a ni fe based superalloy weld metal alloy |
| topic | superalloy weld metal creep boron M23(C B)6 |
| url | https://doi.org/10.1088/2053-1591/ac5078 |
| work_keys_str_mv | AT wencaixie effectsofboronadditiononthemicrostructureandcreeppropertiesofanifebasedsuperalloyweldmetalalloy AT dongwu effectsofboronadditiononthemicrostructureandcreeppropertiesofanifebasedsuperalloyweldmetalalloy AT shanpinglu effectsofboronadditiononthemicrostructureandcreeppropertiesofanifebasedsuperalloyweldmetalalloy |