Journal of Alloys and Compounds2022，Vol.91613.DOI:10.1016/j.jallcom.2022.165480

Ti-Al3Ti metal-intermetallic laminate (MIL) composite with a cubic titanium trialuminide stabilized with silver: Selection of fabrication regimes, structure, and properties

Lazurenko, D. V. Petrov, I. Yu. Mali, V. I. Esikov, M. A. Kuzmin, R. I. Lozanov, V. V. Pyczak, F. Stark, A. Dovzhenko, G. D. Bataev, I. A. Terentiev, D. S. Ruktuev, A. A.
Journal of Alloys and Compounds2022，Vol.91613.DOI:10.1016/j.jallcom.2022.165480
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  • NSTL
  • Elsevier

Ti-Al3Ti metal-intermetallic laminate (MIL) composite with a cubic titanium trialuminide stabilized with silver: Selection of fabrication regimes, structure, and properties

Lazurenko, D. V. 1Petrov, I. Yu. 2Mali, V. I. 3Esikov, M. A. 1Kuzmin, R. I. 1Lozanov, V. V. 4Pyczak, F. 5Stark, A. 5Dovzhenko, G. D. 5Bataev, I. A. 1Terentiev, D. S. 1Ruktuev, A. A.1
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作者信息

  • 1. Novosibirsk State Tech Univ
  • 2. Novosibirsk State Univ
  • 3. Lavrentiev Inst Hydrodinam SB RAS
  • 4. Inst Solid State Chem & Mechanochem SB RAS
  • 5. Helmholtz Zent Hereon
  • 折叠

Abstract

Ti-Al3Ti metal-intermetallic laminate (MIL) composites are known as promising structural materials due to the unique combination of their specific properties. However, their application is still limited due to the extremely high brittleness of the Al3Ti phase. In this study, we attempt to address this issue by changing the D022 crystal structure of Al3Ti to the more ductile L12 structure by alloying it with silver. To select the best fabrication regimes of Ti-Ti(Al1-xAgx)3 composites, in situ synchrotron X-ray diffraction analysis was performed to reveal the chemical reactions occurring upon heating the Ti-Al-Ag sample. The analysis showed that the highest amount of Ti(Al1-xAgx)3 phase with the L12 structure appears at 930 degrees C. This temperature was chosen for subsequent spark plasma sintering experiments. Scanning electron microscopy, energy dispersive X-ray analysis, and X-ray diffraction analysis revealed that the sintered sample consisted mainly of Ti, Ti(Al1-xAgx)3, and a minor fraction of the Ag-Al compound distributed in the central parts of the intermetallic layers and at the grain boundaries. Modification of the titanium trialuminide crystal structure positively affected the properties of the composite, providing a 60% increase in fracture toughness. The Ag-Al phase also contributed to toughening, causing an additional crack deflection effect. (c) 2022 Published by Elsevier B.V.

Key words

Composite materials/Intermetallics/Phase transitions/Synchrotron radiation/Mechanical properties/X-ray diffraction/MICROSTRUCTURE EVOLUTION/FRACTURE-BEHAVIOR/AL3TI

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出版年

2022
Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN：0925-8388
被引量7
参考文献量39
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