PSI - Issue 59

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000

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ScienceDirect

Procedia Structural Integrity 59 (2024) 731–738

© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers Abstract The investigation results of the thermal shock resistance of the TiC-VC/NbC/WC-Ni-Cr alloys, produced by the powder metallurgy method using original nano and fine grained powders of tungsten carbide and nickel at different heating temperatures under thermocycle loading are presented. The number of heating-cooling cycles ranging from 600, 700, and 800°C till the room temperature before the microcracks initiation on the surface of the sample was determined. It was found that alloys obtained using nano powders possess higher thermal shock resistance and higher fracture threshold than those compared with fine grained alloys. The alloys fracture macro- and microstructures with nano additives contain a greater of ductile fracture elements than those compared with fine grained ones. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) Effect of the original powder sizes and chemical composition of the titanium carbide based hard alloys on their thermal shock resistance and fracture mechanism Lyudmyla Bodrova a , Halyna Kramar a , Ihor Koval a, *, Sergii Marynenko a , Yaroslav Kovalchuk a , Mykola Prokopiv b , Yurii Ushchapovskyi b , Oleg Kharchenko b a Ternopil Ivan Puluj National Technical University, 56 Ruska St., Ternopil 46001, Ukraine b V. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Avtozavodska Str., 2, Kyiv 04074, Ukraine Abstract The investigation results of the thermal shock resistance of the TiC-VC/NbC/WC-Ni-Cr alloys, produced by the powder metallurgy method using original nano and fine grained powders of tungsten carbide and nickel at different heating temperatures under thermocycle loading are presented. The number of heating-cooling cycles ranging from 600, 700, and 800°C till the room temperature before the microcracks initiation on the surface of the sample was determined. It was found that alloys obtained using nano powders possess higher thermal shock resistance and higher fracture threshold than those compared with fine grained alloys. The alloys fracture macro- and microstructures with nano additives contain a greater of ductile fracture elements than those compared with fine grained ones. VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) Effect of the original powder sizes and chemical composition of the titanium carbide based hard alloys on their thermal shock resistance and fracture mechanism Lyudmyla Bodrova a , Halyna Kramar a , Ihor Koval a, *, Sergii Marynenko a , Yaroslav Kovalchuk a , Mykola Prokopiv b , Yurii Ushchapovskyi b , Oleg Kharchenko b a Ternopil Ivan Puluj National Technical University, 56 Ruska St., Ternopil 46001, Ukraine b V. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Avtozavodska Str., 2, Kyiv 04074, Ukraine Keywords: thermal shock resistance; hard alloys; nano and fine grained powders; fracture; macrostructure; microstructure; fractography. Keywords: thermal shock resistance; hard alloys; nano and fine grained powders; fracture; macrostructure; microstructure; fractography.

* Corresponding author. Tel.: +380616634453; fax: +380 352 254983. E-mail address: igorkoval1984@gmail.com * Corresponding author. Tel.: +380616634453; fax: +380 352 254983. E-mail address: igorkoval1984@gmail.com

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers 10.1016/j.prostr.2024.04.104