Tribological Properties of Advanced Materials

Tribology examines the interplay of friction, wear and lubrication in contacting surfaces, with advanced materials tailored to reduce energy dissipation and extend service life. Contemporary approaches harness microstructural design—ranging from high-entropy alloys and gradient nano-grains to engineered heterostructures—to modulate deformation mechanisms at the subsurface. By controlling dislocation activity, phase transformations and surface chemistry, researchers can suppress strain localisation, promote protective oxide films and delay the onset of catastrophic wear. These developments have profound implications for transportation, renewable energy and biomedical implants, where enhanced reliability and lower maintenance costs are increasingly critical on a global scale.

Research from Nature Portfolio

Recent studies have shown that deformation twins within a single-crystalline high-entropy alloy serve as in situ probes of complex stress fields during sliding contact. By analysing twin formation under varying orientations, researchers have validated stress-field models that predict frictional responses across diverse tribological systems. In a foundational investigation of copper sliding interfaces, distinct dislocation trace lines beneath a twin boundary were identified, revealing three concurrent deformation processes: simple shear, localised shear at trace lines and crystal rotation. Quantitative separation of these processes has paved the way for predictive modelling of metal friction and microstructural evolution under tribological load.

Tribological Properties of Advanced Materials publication trend

The graph below shows the total number of articles in tribological properties of advanced materials across all publications each year (not limited to Nature Index journals).

Technical terms

Dislocation: A line defect in a crystal lattice that enables plastic deformation.

Deformation twin: A region of crystal with mirrored lattice orientation, formed under stress.

High-entropy alloy (HEA): A multi-principal-element alloy offering high strength and complex microstructural responses.

Fretting fatigue: Wear and crack initiation caused by small-amplitude oscillatory motion under load.

Nanocrystallisation: Formation of grains in the nanometre regime, often resulting from severe plastic deformation.

Heterostructure: A material architecture combining regions of differing composition or microstructure to influence mechanical behaviour.

References

1. Deformation twins as a probe for tribologically induced stress states. Communications Materials (2024).
2. Early deformation mechanisms in the shear affected region underneath a copper sliding contact. Nature Communications (2020).
3. Microstructural evolution and oxidation in α/β titanium alloy under fretting fatigue loading. Friction (2023).
4. Mitigating friction and wear by pre-designed or tribo-induced heterostructures: an overview. Materials Research Letters (2024).
5. The evolution of subsurface deformation and tribological degradation of a multiphase Fe-based hardfacing induced by sliding contact. Materials Science and Engineering A (2024).