Grain-size control in Ti-48Al-2Cr-2Nb with yttrium additions

P. B. Trivedi, E. G. Baburaj, A. Genç, L. Ovecoglu, S. N. Patankar, F. H. Froes

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


A gas-atomized (GA) prealloyed powder of the Ti-48Al-2Cr-2Nb intermetallic and 1.6 wt pct Y were mechanically alloyed (MA) and hot isostatically pressed (hipped) to produce a fully dense nanocrystalline material. Mechanical alloying of the as-blended powder for 16 hours resulted in the formation of a disordered fcc phase. Hipping of the alloy powder produced a single-phase nanocrystalline TiAl intermetallic, containing a distribution of 20 to 35-nm-sized Al2Y4O9 particles. The formation of oxide particles occurred by the chemical combination of Al and Y with oxygen, which entered as a contaminant during milling. Oxide particles increased the hardness of the intermetallic compound and minimized grain growth even at 0.8 Tm, where Tm is the melting point of the compound.

Original languageEnglish
Article number395
Pages (from-to)2729-2734
Number of pages6
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Issue number8
Publication statusPublished - 2002
Externally publishedYes


Dive into the research topics of 'Grain-size control in Ti-48Al-2Cr-2Nb with yttrium additions'. Together they form a unique fingerprint.

Cite this