Effects of Al and refractory alloying elements (W, Ta and Hf) on oxidation kinetics, oxygen dissolution and diffusion in titanium alloys

被引：2

作者：

Gautier, Kevin ^{[1
]}

Epifano, Enrica ^{[1
]}

Gheno, Thomas ^{[2
]}

Connetable, Damien ^{[1
]}

Monceau, Daniel ^{[1
]}

机构：

[1] Univ Toulouse, CIRIMAT, CNRS, INPT,UPS, 4 Allee Emile Monso,BP 44362,44362, F-31030 Toulouse 4, France

[2] Univ Paris Saclay, ONERA, DMAS, F-92322 Chatillon, France

来源：

CORROSION SCIENCE | 2024年 / 237卷

关键词：

Titanium-based alloys; High temperature oxidation; Refractory element; Tungsten; Oxygen dissolution; ALPHA-TI; BEHAVIOR; NITROGEN; ALUMINUM; 550-DEGREES-C; MECHANISMS; AEROSPACE; TUNGSTEN; SILICON;

D O I：

10.1016/j.corsci.2024.112330

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of aluminium, tungsten, tantalum and hafnium on the oxidation behaviour of titanium was investigated. Model alloys were oxidized in air for 5000 h at 650 degrees C. All alloying elements decreased oxide growth and oxygen dissolution in the metal; tungsten was the most efficient. The oxygen diffusivity decreased with aluminium. Tungsten enhanced the formation of Ti2N at the oxide/metal interface which decreased oxygen dissolution in the alloys. Experiments in Ar-20%O2, where Ti2N could not form, confirmed the major role of nitrogen on the oxidation resistance of tungsten-containing alloys. The ternary model alloy Ti-10Al-2W outperformed the high-temperature alloy Ti6242S.

引用

页数：12

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