On the eutectoid transformation behavior of the Ti-Zn system and its metastable phases

Publication date: 25 September 2017
Source:Journal of Alloys and Compounds, Volume 718
Author(s): D.A. Brice, P. Samimi, I. Ghamarian, Y. Liu, M.Y. Mendoza, M.J. Kenney, R.F. Reidy, M. Garcia-Avila, P.C. Collins
To date, Zn has not been used as an alloying addition in structural Ti alloys. The main obstacle has been the disparity between their melting and vaporization temperatures. A novel processing technique was developed to create a Ti-Zn compound. The equilibrium phases and microstructures were studied by electron microscopy and x-ray diffraction techniques. Results show the presence of pearlitic domains of α-Ti (hexagonal closed packed crystal structure) and Ti2Zn (body center tetragonal structure) in regions that have a near eutectoid composition. Solutionizing and water quenching results in the formation of martensite along with intermetallic laths, suggesting that the eutectoid transformation is active.

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