Features of Microstructural Evolution and Corrosion Behavior of Ti6Al4V Titanium Alloy Fabricated from Elemental Powder Blends

Abstract:

Sintered Ti6Al4V titanium alloys prepared from TiH₂/60Al40V powder blends under various technological conditions were studied. The microstructural evolution was investigated by X-ray diffraction, scanning electron microscopy, optical microscopy, and energy dispersive X-ray analysis. The corrosion resistance of sintered titanium alloy was evaluated by the static immersion test in 40 wt.% H₂SO₄ acid, according to ASTM standard G31-72(2004). Depending on powder metallurgy processing parameters (compaction pressure or sintering temperature), the Ti6Al4V alloy was obtained with various structural features (porosity and structural heterogeneity). It was shown that those structural features of sintered Ti6Al4V titanium alloy are a key microstructural factor that determines their corrosion resistance. For instance, an increase in porosity leads to enhanced corrosion resistance. Based on the current research, the optimal manufacturing regimes of powder metallurgy of Ti6Al4V titanium alloy ensure the achievement of characteristics sufficient for practical use in aggressive conditions of the chemical industry were obtained.

• Periodical: Key Engineering Materials (Volume 973)
• Pages: 29-35
• DOI: https://doi.org/10.4028/p-GvGzk5
• Online since: February 2024
• Authors: Serhii Lavrys*, Iryna Pohrelyuk, Dmytro G. Savvakin, Khrystyna Shliakhetka, Mariia Olena Danyliak
• Keywords: Corrosion Resistance, Elemental Powder Blends, Microstructure, Porosity, Powder Metallurgy, Titanium Alloy

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