Cavitation Erosion Behavior in Stainless Steel Alloys

Cavitation erosion in stainless steel alloys arises when vapour or gas bubbles form and collapse repeatedly on a metal surface under oscillating pressure fields, generating high-velocity microjets and shock waves that induce plastic deformation, surface fatigue and progressive material removal. The response of stainless steels to such damage depends on alloy composition, phase balance and microstructural features such as grain size, phase morphology and residual stress. Martensitic grades often exhibit high hardness but limited ductility, whereas austenitic and duplex grades benefit from strain-induced work hardening and enhanced toughness. A stable passive oxide film on the surface can delay the onset of pitting and reduce synergistic erosion-corrosion effects, but its resistance to mechanical rupture and ability to repassivate are critical under aggressive cavitation conditions. Surface engineering methods—including tailored heat treatments, thermo-chemical modifications, mechanical surface processing and advanced coatings—seek to refine microstructure, introduce beneficial residual stresses or alter surface chemistry to improve resistance. Recent trends emphasise the importance of dynamic phase transformations, mechanical property optimisation and electrochemical behaviour in designing stainless steels for hydraulic machinery, marine structures and power-generation components.

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Cavitation Erosion Behavior in Stainless Steel Alloys publication trend

The graph below shows the total number of articles in cavitation erosion behavior in stainless steel alloys across all publications each year (not limited to Nature Index journals).

Technical terms

Cavitation erosion: Material loss caused by repeated collapse of vapour or gas bubbles near a solid surface, producing microjets and shock waves.

Passive film: A thin, protective oxide layer that forms spontaneously on stainless steel surfaces, providing corrosion resistance and delaying pitting under mechanical stress.

Quenching and partitioning (Q&P): A heat-treatment sequence that stabilises retained austenite by controlled cooling and carbon partitioning, enhancing both hardness and toughness.

Retained austenite: A metastable face-centred cubic phase in steel that can transform to martensite under mechanical or thermal stimuli, absorbing deformation energy.

Repassivation: The rapid restoration of a passive film on a metal surface after mechanical damage, crucial for maintaining corrosion and erosion resistance.

References

1. Enhancing the cavitation erosion resistance of AISI 420-type stainless steel with quenching and partitioning. Wear (2023).
2. Effect of Cavitation Intensity on the Cavitation Erosion Behavior of 316L Stainless Steel in 3.5 wt.% NaCl Solution. Metals (2022).
3. Effect of Toughness and Ductility on the Cavitation Erosion of Martensitic Stainless Steel. Metals (2023).
4. Degradation and Protection of Materials from Cavitation Erosion: A Review. Materials (2023).