Field-Assisted Sintering on Microstructural Evolution and Properties of TiAl Intermetallic Alloys

E. Nsiah-Baafi, A. Andrews, M. M. Ramakokovhu, P. A. Olubambi

Research output: Contribution to journalArticlepeer-review


The addition of minor fractions of grain refiners commonly improves the mechanical properties of TiAl intermetallic alloys. In this study, Ti-36 wt.% Al powders were consolidated using a field-assisted sintering technique without adding grain refiners. Various temperatures (650–1300 °C) and pressures (14–50 MPa) were used to elucidate the structure–property relationship. An intermetallic of 99.9% relative density with a corresponding microhardness value of 327 ± 6 HV0.5 was achieved for alloys sintered at 1300 °C and 16 MPa. Alloys sintered at 1100 °C displayed a microstructure consisting of citrus Ti-rich grains, while a duplex microstructure consisting of γ-TiAl + α2-Ti3Al lamellae, and γ-TiAl phases were observed at 1300 °C.

Original languageEnglish
Pages (from-to)2625-2633
Number of pages9
JournalTransactions of the Indian Institute of Metals
Issue number10
Publication statusPublished - Oct 2023


  • Field-assisted sintering
  • Grain refiner
  • Mechanical properties
  • Titanium aluminides

ASJC Scopus subject areas

  • Metals and Alloys


Dive into the research topics of 'Field-Assisted Sintering on Microstructural Evolution and Properties of TiAl Intermetallic Alloys'. Together they form a unique fingerprint.

Cite this