Details

Autor(en) / Beteiligte

• Zhang, Z.G.
• Peng, Y.P.
• Mao, Y.L.
• Pang, C.J.
• Lu, L.Y.

Titel

Effect of hot-dip aluminizing on the oxidation resistance of Ti–6Al–4V alloy at high temperatures

Ist Teil von

• Corrosion science, 2012-02, Vol.55, p.187-193

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2012

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• ► A TiAl3 coating has been developed on Ti–6Al–4V by hot-dip aluminizing. ► The coating provides a high degree of protection for Ti–6Al–4V at 700°C. ► A layered structure of Al2O3/TiAl3/TiAl2/TiAl/alloy forms at 700°C. ► A layered structure of Al2O3/(TiAl3+TiAl2)/TiAl/Ti3Al/alloy forms at 800°C. Hot-dip aluminizing and interdiffusion treatment were used to develop a TiAl3-rich coating on Ti–6Al–4V alloy. Interrupted oxidation at temperatures from 600 to 900°C and isothermal oxidation at 700 and 800°C of the coating were conducted. The coating markedly decreases the oxidation rate in comparison with the alloy at temperatures below 800°C during the interrupted oxidation. The oxidation kinetics follows parabolic relations at 700 and 800°C during the isothermal oxidation. A layered structure of Al2O3/TiAl3/TiAl2/TiAl/alloy from the outside to the inside forms after oxidation at 700°C without changing the main body of the coating.