Ultrasonic Treatment Effects on Microstructure and Mechanical Properties
Summary
Ultrasonic treatment applies high-frequency mechanical vibrations to metallic and crystalline materials, inducing oscillatory shear stresses that interact with lattice defects and phases. This process promotes the break-up and rearrangement of dislocations, accelerates dynamic recrystallisation and refines grain structures to the ultrafine or nanocrystalline scale. In alloys and cast irons, ultrasonic waves can alter phase distributions, reduce eutectic spacing and refine secondary phases, resulting in enhanced hardness, tensile strength and wear resistance. When combined with severe plastic deformation, ultrasonic superposition suppresses defect accumulation and facilitates uniform grain subdivision, yielding improved ductility and fatigue life. The treatment has been demonstrated in bulk materials, melt stirring, isothermal quenching baths and metal-forming operations, offering reductions in processing time and energy consumption. Globally, ultrasonic interventions have found applications in automotive, aerospace and tooling industries, where control of microstructural features at the sub-micrometre scale translates into components with superior performance and reliability. By bridging fundamental defect-mechanics studies and practical processing routes, ultrasonic treatment is emerging as a versatile tool for tailoring mechanical properties in advanced structural materials.
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Ultrasonic Treatment Effects on Microstructure and Mechanical Properties publication trend
The graph below shows the total number of articles in ultrasonic treatment effects on microstructure and mechanical properties across all publications each year (not limited to Nature Index journals).
Technical terms
Ultrasonic treatment: The application of high-frequency (typically >20 kHz) mechanical vibrations to a material to induce internal stresses and enhance defect mobility.
Dislocation: A line defect in a crystal lattice that governs plastic deformation and can be manipulated by external stresses or ultrasonic oscillations.
Ultrafine-grained (UFG): A microstructural state characterised by grain sizes below one micrometre, achieved through techniques such as ultrasonic-assisted severe plastic deformation.
Severe plastic deformation (SPD): A group of metalworking processes imposing very large strains under controlled conditions to refine grains without significant change in overall dimensions.
References
- Bulk Ultrasonic Treatment of Crystalline Materials. Metals (2023).
- Effect of Ultrasonic Treatment on Microstructure and Properties of Gray Cast Iron. Journal of Physics Conference Series (2023).
- Influence of ultrasonic processing on the mechanical properties of metals subjected to intense plastic deformation. Doklady of the National Academy of Sciences of Belarus (2022).
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