PSI - Issue 40

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

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 40 (2022) 372–377

© 2022 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 the15th International Conference on Mechanics, Resources and Diagnostics of Materials and Structures. Abstract Based on the result of instrumental indentation, the micromechanical properties of a monolithic SHS-composite of the Fe-Ni C-B system are determined. The matrix of the composite is austenite, the hardening phases are TiC, TiB 2 , the particles of which are randomly placed in the matrix. Regions of the eutectic structure “γ -Fe + Fe 2 B” were found in the matrix. They are the most plastic and are characterized by the maximum values of h max , φ , C IT . The maximum values of strength indices ( E *, R e , H IT / E *, H IT 3 /E* 2 ) are typical for the regions “γ - Fe + TiC” and “γ -Fe + TiB 2 + TiC”. Composite specimens after bending tests fractured ductilely with a high fracture work. The axes of the Fe 2 B dendrites in the “ γ -Fe + Fe 2 B” eutectic are deformed in the process of testing up to the destruction of the samples. © 2022 The Authors. P ublished 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 the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. Keywords: Self-propagating high-temperature synthesis; Composites; Matrix; Hardening phases; Eutectic; Microindentation; Microhardness: contact modulus of elasticity, strength, fractography 1. Introduction Self-propagating high-temperature synthesis (S Н S) is one of the most modern methods used for the preparation of new powder and monolithic materials and coatings with unique properties – Amosov et al. (2007) and Mergznov (2000). The available SHS composites are characterized by high hardness, high brittleness, and a tendency to cracking and cracking under the action of external loads, in particular, when impact loads are applied. Ever-growing Micromechanical properties and character of fracture after cross bending of the SHS composite by the Fe-Ni-Ti-C-B system N.B. Pugacheva*, T.M. Bykova Institute of Engeneering Science, Ural Branch, Russian Academy of Sciences, 620049 Ekaterinburg, Russia Abstract Based on the result of instrumental indentation, the micromechanical properties of a monolithic SHS-composite of the Fe-Ni C-B system are determined. The matrix of the c mposite is austenite, the hardening phases are TiC, TiB 2 , the particles of which are rando ly placed in the matrix. Regi ns of the eutectic structure “γ -Fe + F 2 B” were found in the matrix. They are the most plastic and are characterized by the maximum values of h max , φ , C IT . Th maximum values of strength indices ( E *, R e , H IT / E *, H IT 3 /E* 2 ) are typical for the regions “γ - Fe + TiC” and “γ -Fe + TiB 2 + TiC”. Co posite specimens after bending tests fractured ductilely with a high fracture work. The axes of the Fe 2 B d ndrites in the “ γ -Fe + Fe 2 B” eutectic are d formed in the process of testing up to the destruction of the samples. © 2022 The Authors. P ublished 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 committe of the15th International C ference on Mechanics, Resource and Diagnostics of Materials and Structur s. Keywords: Self-propagating high-temperature synthesis; Composites; Matrix; Hardening phases; Eutectic; Microindentation; Microhardness: contact modulus of elasticity, strength, fractography 1. Introduction Self-propagating high-temperature synthesis (S Н S) is one of the most modern methods used for the preparation of new powder and monolithic material a d coatings w th unique properties – A osov et al. (2007) and Mergz v (2000). The vailable SHS composites are character zed by high ha dness, high brittleness, and tend ncy to cracking and cr cking under the action of extern l loads, in particular, when impact loads ar applie . Ev r-growing 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures Micromechanical properties and character of fracture after cross bending of the SHS composite by the Fe-Ni-Ti-C-B system N.B. Pugacheva*, T.M. Bykova Institute of Engeneering Science, Ural Branch, Russian Academy of Sciences, 620049 Ekaterinburg, Russia 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Stru tures

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

2452-3216 © 2022 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 the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. 2452-3216 © 2022 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 the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures.

2452-3216 © 2022 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 the15th International Conference on Mechanics, Resources and Diagnostics

of Materials and Structures. 10.1016/j.prostr.2022.04.050