THE EFFECT OF ULTRA-FINE ALLOYING ELEMENTS ON THE PHASE COMPOSITION, MICROSTRUCTURE, HIGH-TEMPERATURE STRENGTH AND FRACTURE TOUGHNESS OF Ti–Si–X AND Ti–Cr–X COMPOSITES

Authors

  • Volodymyr Kulyk Lviv Polytechnic National University https://orcid.org/0000-0001-5999-3551
  • Bogdan Vasyliv Department of Hydrogen Technologies and Alternative Energy Materials, Karpenko Physico-Mechanical Institute of the NAS of Ukraine, 5 Naukova str., Lviv 79060, Ukraine https://orcid.org/0000-0002-8827-0747
  • Zoia Duriagina Department of Materials Science and Engineering, Lviv Polytechnic National University, 12 S.Bandera str., Lviv 79013, Ukraine https://orcid.org/0000-0002-2585-3849
  • Pavlo Lyutyy Department of Materials Science and Engineering, Lviv Polytechnic National University, 12 S.Bandera str., Lviv 79013, Ukraine https://orcid.org/0000-0001-7266-1113
  • Valentyna Vavrukh Department of Materials Science and Engineering, Lviv Polytechnic National University, 12 S.Bandera str., Lviv 79013, Ukraine https://orcid.org/0000-0002-3143-2522
  • Taras Kovbasiuk Department of Materials Science and Engineering, Lviv Polytechnic National University, 12 S.Bandera str., Lviv 79013 https://orcid.org/0000-0003-2792-0555
  • Volodymyr Vira Department of Strength of Materials and Structural Mechanics, Lviv Polytechnic National University, 12 S.Bandera str., Lviv 79013, Ukraine https://orcid.org/0000-0002-5121-7336
  • Myroslav Holovchuk Department of Corrosion and Corrosion Protection, Karpenko Physico-Mechanical Institute of the NAS of Ukraine, 5 Naukova str., Lviv 79060, Ukraine https://orcid.org/0000-0002-1861-9499
  • Tetiana Loskutova Department of Materials Science and Heat Treatment, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37 Peremohy ave., Kyiv 03056, Ukraine https://orcid.org/0000-0002-1894-8321

DOI:

https://doi.org/10.36547/ams.28.1.1350

Keywords:

MAX phase, high-temperature strength, fracture toughness, phase composition, microstructure, fracture micromechanism, Ti–Si–X, Ti–Cr–X, composite

Abstract

Advanced Ti-based composites are promising for applications in components of modern aircraft and rocket engines as well as other power equipment owing to their high strength-to-weight ratio and fracture toughness in a temperature range of 20 °C to 650 °C. However, there is a need to increase their operating temperature range up to 700−800 °C. In this work, mechanical behavior of Ti–Si–X composites (X=Al and/or Zr, Sn, C) has been studied. For comparison, mechanical behavior of Ti–Cr–X composite (X=Al and/or C) has been studied. As-cast and thermo-mechanically deformed series of beam specimens were examined. Strength tests of specimens were performed under three-point bending in a temperature range of 20 °C to 1000 °C. Single-edge notch beam (SENB) tests under three-point bending of specimen series were carried out in a temperature range of 20 °C to 900 °C for estimating fracture toughness of materials. Based on the constructed dependences of fracture toughness and strength on testing temperature for the specimen series as well as the microstructure and failure micromechanism analyses, the role of ultra-fine alloying elements in achieving good high-temperature strength and fracture toughness of the studied composites was substantiated.

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Published

2022-03-15

How to Cite

Kulyk, V., Vasyliv , B., Duriagina, Z., Lyutyy, P., Vavrukh, V., Kovbasiuk, T., Vira, V., Holovchuk, M., & Loskutova, T. (2022). THE EFFECT OF ULTRA-FINE ALLOYING ELEMENTS ON THE PHASE COMPOSITION, MICROSTRUCTURE, HIGH-TEMPERATURE STRENGTH AND FRACTURE TOUGHNESS OF Ti–Si–X AND Ti–Cr–X COMPOSITES. Acta Metallurgica Slovaca, 28(1), 33–42. https://doi.org/10.36547/ams.28.1.1350

Issue

Vol. 28 No. 1 (2022): Acta Metallurgica Slovaca

Section

Research papers