Residual stresses in Cu matrix composite surface deposits after laser melt injection

Tungsten carbide particles reinforced metal matrix composite (MMC) coatings can significantly improve surface wear resistance owing to their increased hardness. However, the presence of macro- and micro-residual stresses in MMC have detrimental effects, such as reducing service life. In this study, neutron diffraction was used determine residual spherical fused tungsten (sFTC) Cu deposits after laser melt injection. We also developed a thermo-mechanical coupled finite element model predict stresses. Our findings reveal that sFTC/Cu produced with preheating temperature 400°C low stresses, maximum tensile stress 98 MPa on top surface. contrast, sFTC/bronze (CuAl10Ni5Fe4) deposit exhibits very high reaching 651 MPa. These results provide better understanding magnitudes distributions sFTC-reinforced manufactured via