Elsevier

Scripta Materialia

Volume 93, 15 December 2014, Pages 32-35
Scripta Materialia

Metastable orthorhombic phases at ambient pressure in mechanically milled pure Ti and Ti–Mg

https://doi.org/10.1016/j.scriptamat.2014.08.024Get rights and content

Nanocrystalline Ti and Ti–20 at.% Mg produced by mechanical milling were characterized using nanobeam diffraction. Metastable ω (hexagonal) and γ (orthorhombic) phases were observed in the pure Ti, while γ, a new orthorhombic ε phase and a face-centred cubic (fcc) phase were identified in the Ti–Mg. γ, found so far only at high pressures, was produced by a combination of high impact pressure and shear stress during milling. The forced dissolution of Mg caused the formation of the ε and fcc phases.

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