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In order to investigate the laws of the laser peening forming process and the effects of laser peening on the surface quality and tensile properties of 5083 aluminum alloy, experiments were conducted utilizing various laser peening paths, energies, and plate thicknesses. Subsequently, laser peening forming experiments were performed on S-shaped and different shapes of aluminum alloy substrates. The impact of different laser peening durations on surface morphology and tensile properties was then analyzed. Results indicated that the largest bending deformation perpendicular to the laser peening path reached 12.5 mm. In cases where the laser peening path was inclined relative to the horizontal direction, torsional deformations were observed in the aluminum alloy plate. For laser energy levels of 5 J, 6 J, and 7 J, deformation amounts were 3.8 mm, 4.9 mm, and 5.4 mm, respectively. Plates with thicknesses of 4 mm exhibited convex deformation, while those with 2 mm thickness showed concave deformation. Furthermore, following one and two laser peening cycles, the residual stresses in the alloy plates were −80 MPa and −107 MPa, the surface hardness increased by 16 HV and 31 HV, the roughness increased by 2.495 μm and 3.615 μm, and the tensile strength increased by 9.5 MPa and 18.5 MPa, respectively. [ABSTRACT FROM AUTHOR]

Interface models of diamond-coated cemented carbide tool WC-Co / SiC/ Diamond with Co mass fraction of 6%, 8%, 10% and 12% were constructed. The influences of different deposition temperatures on the interface bonding strength were simulated with the molecular dynamics method, and the reasons were analyzed from perspectives of adhesion work and bond length distribution. The adhesion work analysis indicates that, compared with the other three Co content interface models, the two interfaces in WC-6% Co / SiC/ Diamond interface model have the highest adhesion work values at seven deposition temperatures. At different deposition temperatures, both interfaces of WC-6% Co / SiC and SiC/ Diamond in WC-6% Co / SiC/ Diamond have the highest adhesion work values of 2. 468 and 5. 394 J / m² at 1 123 and 1 173 K, respectively. The analysis results of bond length distribution indicate that, at any deposition temperature, compared with the other three Co content interface models, the maximum value of the bond length distribution range at each interface of WC-6% Co / SiC/ Diamond is smaller. The interface model obtained by sequentially depositing SiC layer on WC-6%Co substrate at 1 123 K and diamond coating on SiC layer at 1 173 K has the shortest interface bond length, the largest bond energy, and the best interface bonding property. Key words: diamond-coated cemented carbide; WC-Co / SiC/ Diamond; deposition temperature; Co content; interface [ABSTRACT FROM AUTHOR]