USSP-Treated TiAl Alloy

76% lower oxidation gain

Ultrasonic shot peening introduces an Al-enriched layer and nanocrystalline surface, promoting a continuous dense α-Al₂O₃ scale at 900 °C and greatly enhancing oxidation resistance.

Tao, Fan · Xinyu, Ye · Gui, Wanyuan · Yan, Haojie · Min, Wang · Liang, Yongfeng · Junpin, Lin · Hu, Jing · Sun, Qingqing · Wu, Liankui · Cao, Fahe

Corrosion Science 2026

Specifications

Oxidation mass gain

{'zh': '0.28', 'en': '0.28'} mg cm⁻²

Advantages

Mass gain reduced by 76%

After USSP treatment, the mass gain after 100 h at 900 °C is only 24% of the untreated sample, indicating much better oxidation resistance.

Self-forms dense alumina

The Al-enriched layer promotes the development of a continuous and dense α-Al₂O₃ scale during oxidation, which blocks oxygen inward diffusion.

Interfacial nitride barrier

The fine-grained structure provides abundant short-circuit diffusion paths, accelerating the formation of a continuous Ti₂AlN layer at the oxide scale/alloy interface, which acts as an effective barrier against inward diffused oxygen.

Applications

• High-temperature structural components：For turbine blades and similar high-temperature structures, extending oxidation life.
• Heat-resistant parts：For parts requiring long-term heat resistance, reducing oxidation loss.
• Oxidation-resistant coatings：As an oxidation-resistant surface treatment, replacing conventional coating processes.