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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 high-temperature materials with potential to replace heavier superalloys like Ni-based alloys. This research investigates the influence of heat treatment on the microstructure and mechanical properties of TiAlSi-3.7Mo and TiAlSi-13.7 V alloys synthesized using in situ laser alloying. Heat treatment was conducted at 1200 °C and 1400 °C for 60 minutes, followed by furnace cooling. The microstructure and composition were analyzed using scanning electron microscopy (SEM) with energy-dispersive spectroscopy (EDS), while phase identification was performed using x-ray diffractometry (XRD) and electron backscattered diffraction (EBSD). Nanomechanical properties were assessed using an Anton Paar nanoindentation tester, and microhardness values were determined with a Vickers hardness tester. Results indicated the presence of dual-phased (DP) and fully lamellar (FL) microstructures at 1200 °C and 1400 °C, revealing varying phases influenced by Mo and V alloying elements. Significant improvements in mechanical properties, particularly in the alloy with V inclusion, were observed post-heat treatment, marked by increased formation of α2 + γ lamellae. This study demonstrates that V and Mo additions enhance the mechanical properties of Ti-Al-Si alloys after appropriate heat treatments.

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Cite This Work

@article{12fb3131-1b1b-44d2-8a09-4b11cce2260c,
  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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