Plastic-deformation-driven SiC nanoparticle implantation in an Al surface by laser shock wave: Mechanical properties, microstructure characteristics, and synergistic strengthening mechanisms

摘要: Abstract Laser shock-wave-driven nanoparticle implantation (LSWNI) in alloys is a novel surface strengthening technique based on plastic deformation induced by laser shock processing and the excellent properties of hard-phase nanoparticles. In present work, 50–100 nm silicon carbide (SiC) nanoparticles were successfully implanted into commercially pure aluminum (Al) substrates under effect wave. After implantation, stable nanoparticle-reinforced layers fabricated, their microstructural response grain refinement characterized X-ray diffraction (XRD), focused ion beam (FIB), transmission electron microscopy (TEM). addition, mechanical properties, including residual stress, nanohardness, elastic modulus, wear resistance, investigated. Experimental results showed that Al samples subjected to LSWNI exhibited superior because good combination between gradient microstructure distribution SiC along depth direction. Therefore, overall generated process can be described as two different modes: (i) contributed mainly enhancement stress (ii) was dedicated primarily improvement resistance. As indicated during process, three competing mechanisms, namely, strengthening, refined dislocation existed gradient-reinforced layers. The detailed contribution each mechanism reinforced layer determined using modified Clyne computational model herein. Finally, fabricated revealed.