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Effects of Heat Treatment on the Microstructure and Mechanical Properties of TiAlSi-3.7Mo and TiAlSi-13.7 V Alloys Synthesized via in Situ Laser Alloying

Sadiq Abiola Raji, Abimbola Patricia Idowu Popoola

2026enheat treatmenttial alloysmicrostructuremechanical propertieslaser alloying

Abstract

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Titanium aluminide (TiAl)-based alloys are promising materials for reducing weight in aerospace engines but suffer from low ductility and fracture toughness. This study investigates how heat treatment affects the microstructure and mechanical properties of TiAlSi-3.7Mo and TiAlSi-13.7 V alloys synthesized through in situ laser alloying. Heat treatments were conducted at 1200 °C and 1400 °C for one hour, followed by furnace cooling. The microstructure was analyzed using scanning electron microscopy (SEM) with energy-dispersive spectroscopy (EDS), phase identification through x-ray diffraction (XRD) and electron backscattered diffraction (EBSD), and mechanical properties were evaluated with nanoindentation and Vickers hardness testing. The results revealed that the alloys exhibited dual-phased (DP) and fully lamellar (FL) microstructures corresponding to the treatment temperatures, showing different precipitating phases, influenced by alloying elements Mo and V. Specifically, the presence of V led to enhanced mechanical properties post-heat treatment due to the increased formation of a2 + c lamellae. Overall, the incorporation of V and Mo in Ti-Al-Si alloys improved their mechanical performance after appropriate heat treatments.

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Cite This Work

@article{dd28d2c8-167c-40ac-a487-e233a0ef698b,
  title={Effects of Heat Treatment on the Microstructure and Mechanical Properties of TiAlSi-3.7Mo and TiAlSi-13.7 V Alloys Synthesized via in Situ Laser Alloying},
  author={Sadiq Abiola Raji and Abimbola Patricia Idowu Popoola},
  year={2026},
  language={en}
}
TY  - JOUR
TI  - Effects of Heat Treatment on the Microstructure and Mechanical Properties of TiAlSi-3.7Mo and TiAlSi-13.7 V Alloys Synthesized via in Situ Laser Alloying
AU  - Sadiq Abiola Raji
AU  - Abimbola Patricia Idowu Popoola
PY  - 2026
LA  - en
ER  -

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