In laser forming, phase transformations in the heat-affected zone take place under steep thermal cycles, and have a significant effect on the flow behavior of Ti–6Al–4V alloy and the laser-forming process. The flow-stress data of a material are generally provided as only dependent on strain, strain rate, and temperature, while phase transformations are determined by both temperature and tempera...

In this paper, the three-dimensional bowl surface was obtained by reasonably planning radial heating path taking laser as heat source and stainless steel composite plate (06Cr19Ni10/1Cr17Mn6Ni5N/06Cr19Ni10) research object, forming process of studied. It found that target bending inside-outside symmetric scanning strategy (strategy d) had highest accuracy. The deformation increased with increas...

We consider a laser beam incident normally upon a waveguide with a Kerr nonlinearity. Although the laser is uniform in the plane of the waveguide, we show that the waveguide fields can be unstable to growth, forming coherent periodic structures. The initial, exponential time dependence is determined, and we find a steady-state solution. Finally, we note that the mechanism necessary for this ins...