The Computation and Measurement of Residual Stresses in Laser Deposited Layers

Residual stresses in laser direct metal deposited Waspaloy

“…Further, they found little sensitivity of the stresses to the track raster pattern used [20]. Finite element modelling work also predicts tensile stresses near surface and compressive stresses perpendicular to the substrate [21,22]. They also predicted little effect on laser speed when the laser power was adjusted to maintain the same heat input.…”

Residual Stress Measurement and the Slitting Method

“…The use of finite element computation allows compliances to be obtained for parts that are made of different materials and/or are nonuniform in width. Figure 6.28 shows such an example, in which a piecewise function is used to estimate the residual stress that is discontinuous due to the nonuniform width and the change in material properties through the thickness [54]. Additional experimental results have been reported in [2,33,45,48,73,88,91].…”

Finite Element Simulation of Temperature and Stress Field for Laser Cladded Nickel-Based Amorphous Composite Coatings

“…The coating was subjected to a maximum von Mises stress of 354 MPa at the coating/substrate interface. The high stress distribution at the clad/substrate interface was likely caused by the sudden change in width across the interface and the big difference in thermal properties of the laser cladded coating and the substrate [19]. When the distance from the coating was larger than 1 mm, the stress was almost 0.…”