Residual stress induced by cold spray coating of magnesium AZ31B extrusion

摘要: Abstract Aluminum particles were successfully sprayed on wrought magnesium AZ31B extrusion using the cold spray technology. Cold high impact velocity of colliding with substrate induced beneficial compressive residual stresses. Magnitude stress at surface and its distribution through thickness measured X-ray diffraction. With particle spraying 400 m/s, was to be −25 MPa surface. The process collision development then modeled LS-DYNA software study effect parameters profile. Various models employed simulate single multiple particles. An asymmetric material model that considers strain rate different behavior in tension compression. Results simulations for compared results XRD measurements depth substrate. After validation models, a parametric performed find optimum velocity, size, shape, incident angle, friction parameters. Parameters leading profile are introduced herein.