Microstructure and properties of TLPB joints of IN718 with 3D waveform structure prepared by SLM

Inconel 718 (IN718) superalloys with multi-size 3D waveform structures were prepared by selective laser melting (SLM) technology, and the transient liquid phase bonding (TLPB) of IN718 was carried out using a rapidly solidified BNi2 filler containing melting point depressant (MPD) elements. In this...

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Veröffentlicht in:Welding in the world 2022, Vol.66 (5), p.1009-1023
Hauptverfasser: Wang, Boyu, Shi, Haichuan, Zhang, Peilei, Yu, Zhishui, Yan, Hua, Cheng, Qiran, Song, Nan
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container_end_page 1023
container_issue 5
container_start_page 1009
container_title Welding in the world
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creator Wang, Boyu
Shi, Haichuan
Zhang, Peilei
Yu, Zhishui
Yan, Hua
Cheng, Qiran
Song, Nan
description Inconel 718 (IN718) superalloys with multi-size 3D waveform structures were prepared by selective laser melting (SLM) technology, and the transient liquid phase bonding (TLPB) of IN718 was carried out using a rapidly solidified BNi2 filler containing melting point depressant (MPD) elements. In this study, the microstructure and mechanical properties of TLPB joints after brazing at 1080 °C for 20 min were investigated, and the effects of different 3D waveform structures on the formation and properties of TLPB joints were analyzed. The experimental results show that there are three zones in the TLPB joint of IN718 superalloy: (i) the isothermally solidified zone (ISZ) consisting of γ-Ni solid solution, (ii) the athermally solidified zone (ASZ) consisting of Ni 3 B, CrB, Ni 6 Si 2 B phases, and fine Ni 3 Si particles, and (iii) the diffusion affected zone (DAZ) consisting of Cr rich borides and Cr-Nb-Mo rich borides. And a region with high Cr content was found in the ASZ. In addition, the shear strength of the joint increased gradually with the increase of the groove depth of the 3D waveform structure. The shear strength of the TLPB joints reached a maximum of 515.17 MPa when the groove depth of the IN718 3D waveform was 0.8 mm, and the fracture mode of the joints gradually changed from brittle fracture to mixed tough-brittle fracture.
doi_str_mv 10.1007/s40194-022-01251-2
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In this study, the microstructure and mechanical properties of TLPB joints after brazing at 1080 °C for 20 min were investigated, and the effects of different 3D waveform structures on the formation and properties of TLPB joints were analyzed. The experimental results show that there are three zones in the TLPB joint of IN718 superalloy: (i) the isothermally solidified zone (ISZ) consisting of γ-Ni solid solution, (ii) the athermally solidified zone (ASZ) consisting of Ni 3 B, CrB, Ni 6 Si 2 B phases, and fine Ni 3 Si particles, and (iii) the diffusion affected zone (DAZ) consisting of Cr rich borides and Cr-Nb-Mo rich borides. And a region with high Cr content was found in the ASZ. In addition, the shear strength of the joint increased gradually with the increase of the groove depth of the 3D waveform structure. The shear strength of the TLPB joints reached a maximum of 515.17 MPa when the groove depth of the IN718 3D waveform was 0.8 mm, and the fracture mode of the joints gradually changed from brittle fracture to mixed tough-brittle fracture.</description><identifier>ISSN: 0043-2288</identifier><identifier>EISSN: 1878-6669</identifier><identifier>DOI: 10.1007/s40194-022-01251-2</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Borides ; Brittle fracture ; Chemistry and Materials Science ; Chromium ; Grooves ; Laser beam melting ; Liquid phases ; Materials Science ; Mechanical properties ; Melting points ; Metallic Materials ; Microstructure ; Molybdenum ; Nickel base alloys ; Niobium ; Rapid solidification ; Research Paper ; Shear strength ; Solid Mechanics ; Solid solutions ; Superalloys ; Theoretical and Applied Mechanics ; Transient liquid phase bonding ; Waveforms</subject><ispartof>Welding in the world, 2022, Vol.66 (5), p.1009-1023</ispartof><rights>International Institute of Welding 2022</rights><rights>International Institute of Welding 2022.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c319t-e91a4f0f5156707273bf3a5778fafc7ad7d63809264872ae41fcba2a4926b31d3</citedby><cites>FETCH-LOGICAL-c319t-e91a4f0f5156707273bf3a5778fafc7ad7d63809264872ae41fcba2a4926b31d3</cites><orcidid>0000-0003-1683-7502</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s40194-022-01251-2$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s40194-022-01251-2$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids></links><search><creatorcontrib>Wang, Boyu</creatorcontrib><creatorcontrib>Shi, Haichuan</creatorcontrib><creatorcontrib>Zhang, Peilei</creatorcontrib><creatorcontrib>Yu, Zhishui</creatorcontrib><creatorcontrib>Yan, Hua</creatorcontrib><creatorcontrib>Cheng, Qiran</creatorcontrib><creatorcontrib>Song, Nan</creatorcontrib><title>Microstructure and properties of TLPB joints of IN718 with 3D waveform structure prepared by SLM</title><title>Welding in the world</title><addtitle>Weld World</addtitle><description>Inconel 718 (IN718) superalloys with multi-size 3D waveform structures were prepared by selective laser melting (SLM) technology, and the transient liquid phase bonding (TLPB) of IN718 was carried out using a rapidly solidified BNi2 filler containing melting point depressant (MPD) elements. 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In this study, the microstructure and mechanical properties of TLPB joints after brazing at 1080 °C for 20 min were investigated, and the effects of different 3D waveform structures on the formation and properties of TLPB joints were analyzed. The experimental results show that there are three zones in the TLPB joint of IN718 superalloy: (i) the isothermally solidified zone (ISZ) consisting of γ-Ni solid solution, (ii) the athermally solidified zone (ASZ) consisting of Ni 3 B, CrB, Ni 6 Si 2 B phases, and fine Ni 3 Si particles, and (iii) the diffusion affected zone (DAZ) consisting of Cr rich borides and Cr-Nb-Mo rich borides. And a region with high Cr content was found in the ASZ. In addition, the shear strength of the joint increased gradually with the increase of the groove depth of the 3D waveform structure. The shear strength of the TLPB joints reached a maximum of 515.17 MPa when the groove depth of the IN718 3D waveform was 0.8 mm, and the fracture mode of the joints gradually changed from brittle fracture to mixed tough-brittle fracture.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s40194-022-01251-2</doi><tpages>15</tpages><orcidid>https://orcid.org/0000-0003-1683-7502</orcidid></addata></record>
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subjects Borides
Brittle fracture
Chemistry and Materials Science
Chromium
Grooves
Laser beam melting
Liquid phases
Materials Science
Mechanical properties
Melting points
Metallic Materials
Microstructure
Molybdenum
Nickel base alloys
Niobium
Rapid solidification
Research Paper
Shear strength
Solid Mechanics
Solid solutions
Superalloys
Theoretical and Applied Mechanics
Transient liquid phase bonding
Waveforms
title Microstructure and properties of TLPB joints of IN718 with 3D waveform structure prepared by SLM
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