PSI - Issue 50

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

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ScienceDirect

Procedia Structural Integrity 50 (2023) 251–256

© 2023 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 the scientific committee of the MRDMS 2022 organizers Abstract The paper presents the results of studying the microstructure, chemical and phase compositions of a Cu-Ti-C-B composite produced by self-propagating high-temperature synthesis (SHS). It has been found that the matrix of the composite is a titanium doped copper-based solid solution. Titanium carbide TiC and titanium diboride TiB 2 are the strengthening phases. Single particles of boron carbide B 4 C unreacted in SHS have been detected, with the hardness 3332 HV 0.1. The composite density is 6.8 g/cm 3 . The overall hardness of the composite is 60 to 62 HRC. The uneven distribution of the constituents in the volume of the composite causes the uneven distribution of its micromechanical properties. The most ductile constituent of the composite is the Cu+TiC mechanical mixture, which ensures the high ductile fracture energy of the composite in transverse bending testing. On the fracture surface, at the interface separating the B 4 C particles and the copper-based solid solution, there are microvoids indicating the start of microcracks growth. The strength of the composite is R bm 30 = 820 MPa. © 2023 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 the scientific committee of the MRDMS 2022 organizers Keywords: Composite; Microstructure; Matrix; Titanium carbide; Titanium diboride; Hardness; Strength; Fractography 1. Introduction Composite materials and coatings produced by self-propagating high-temperature synthesis (SHS) have shown themselves to advantage in terms of increased hardness and wear resistance – Merzhanov et al. (2008), Kharatyan et al. (2012) and Levashov et al. (2017). It is important to choose the chemical composition of the matrix in a 16th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures (MRDMS 2022) Micromechanical properties and transverse rupture strength of a Cu Ti-C-B composite N.B. Pugacheva*, T.M. Bykova Institute of Engeneering Science, Ural Branch, Russian Academy of Sciences, Ekaterinburg 620049, Russia Abstract The paper presents the results of studying the microstructure, chemical and phase compositions of a Cu-Ti-C-B composite produced by self-propagating high-temperature synthesis (SHS). It has been found that the matrix of the composite is a titanium doped copper-based solid solution. Titanium carbide TiC and titanium diboride TiB 2 are the strengthening phases. Single particles of boron carbide B 4 C unreacted in SHS have been detected, with the hardness 3332 HV 0.1. The composite density is 6.8 g/cm 3 . The overall hardness of the composite is 60 to 62 HRC. The uneven distribution of the constituents in the volume of the composite causes the uneven distribution of its micromechanical properties. The most ductile constituent of the composite is the Cu+TiC mechanical mixture, which ensures the high ductile fracture energy of the composite in transverse bending testing. On the fracture surface, at the interface separating the B 4 C particles and the copper-based solid solution, there are microvoids indicating the start of microcracks growth. The strength of the composite is R bm 30 = 820 MPa. © 2023 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 the scientific committee of the MRDMS 2022 organizers Keywords: Composite; Microstructure; Matrix; Titanium carbide; Titanium diboride; Hardness; Strength; Fractography 1. Introduction Composite materials and coatings produced by self-propagating high-temperature synthesis (SHS) have shown themselves to advantage in terms of increased hardness and wear resistance – Merzhanov et al. (2008), Kharatyan et al. (2012) and Levashov et al. (2017). It is important to choose the chemical composition of the matrix in a 16th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures (MRDMS 2022) Micromechanical properties and transverse rupture strength of a Cu Ti-C-B composite N.B. Pugacheva*, T.M. Bykova Institute of Engeneering Science, Ural Branch, Russian Academy of Sciences, Ekaterinburg 620049, Russia

* Corresponding author. Tel.: +7-950-63-53-004; fax: +7-343-347-53-30. E-mail address: address: nat@imach.uran.ru * Corresponding author. Tel.: +7-950-63-53-004; fax: +7-343-347-53-30. E-mail address: address: nat@imach.uran.ru

2452-3216 © 2023 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 the scientific committee of the MRDMS 2022 organizers 2452-3216 © 2023 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 the scientific committee of the MRDMS 2022 organizers

2452-3216 © 2023 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 the scientific committee of the MRDMS 2022 organizers 10.1016/j.prostr.2023.10.048