3D printing of active mechanical metamaterials: A critical review

Materials & Design, Journal Year: 2024, Volume and Issue: unknown, P. 113305 - 113305

Published: Sept. 1, 2024

Language: Английский

Fabrication of Mechanically Robust Hydrophobic Surfaces Using Femtosecond Laser Shock Peening

Materials, Journal Year: 2025, Volume and Issue: 18(9), P. 2154 - 2154

Published: May 7, 2025

The harsh service environment has increased the demand for hydrophobic surfaces with excellent mechanical properties; however, how to manufacture such remains a significant challenge. In this study, method fabricating properties using femtosecond laser shock peening (fs-LSP) is proposed, without need any additional processing steps. Taking CH1900A martensitic steel as an example, systematic analysis of microstructure was conducted after fs-LSP, revealing mechanisms by which fs-LSP affects surface morphology, grain structure, dislocation density, and boundary characteristics. high-density dislocations refinement induced significantly enhanced hardness introduced residual compressive stresses. Additionally, laser-induced periodic micro/nanostructures on ensured properties. effect single pulse energy number impacts also been discussed in detail. As were increased, material progressively optimized, evidenced refinement, increase geometrically necessary (GND) higher proportion high-angle boundaries (HAGBs). Such optimization not monotonous or unlimited; 75 μJ six achieved optimal effect, reaching up 8.2 GPa contact angle 135 degrees. proposed provides new strategy manufacturing properties, detailed discussion provide theoretical guidance process optimization.

Language: Английский

Ultrafast laser-induced topochemistry on metallic glass surfaces

Materials & Design, Journal Year: 2024, Volume and Issue: 244, P. 113164 - 113164

Published: July 15, 2024

Manufacturing multifunctional nanocomposite materials and engineered surface nanopatterns involves a strategic blend of topography, crystal structures, chemistry. Here, we report the controllable formation crystalline nanoparticles intermetallic compounds on thin films metallic glasses (Zr50Cu50, Ti50Cu50, Zr67Ag33) irradiated by ultrafast laser beams. Mapping structural modification photoexcited subsequently heated alloys reveals previously neglected chemical reactions with air, offering direct solution for incorporating into an amorphous oxide matrix broadening range laser-induced self-organization features. Our findings are attributed to occurrence enrichment oxygen contamination that reacts selected elements glasses. Additionally, growth phase from undercooled liquid may originate dissolution oxides. Finally, our results establish combination periodic patterns can be universally obtained in wide binary systems

Language: Английский