1 During 1918 there were many problems in the United States. 2  One of these major problems was the influenza. 3  Its symptoms were headaches, and queasy feelings in the stomach. 4  This disease had infected the people of Denver, and other cities across the nation.
Direct metal laser sintering (DMLS) is an additive manufacturing technique that uses a carbon dioxide laser fired into a magnesium substrate to sinter powdered material (typically metal), aiming the laser automatically at points in space defined by a 3D model, binding the material together to create a solid structure.
When metal is heated, its color is altered due to an annealing effect. This effect is created because of structural changes in the outer metal layer.The laser allows the creation of areas and structures / textures on the workpiece surface in different colors without the use of additives.The table on the right shows examples of different annealing colors of unalloyed tool steel.his effect is created because of structural changes in the outer metal layer. The laser allows the creation of areas and structures / textures on the workpiece surface in different colors without the use of additives. The table on the right shows examples of different annealing colors of unalloyed tool steel.