EXPERIMENTAL INVESTIGATION ABOUT THE MICROSTRUCTURE OF JOINT AREA BETWEEN LAYERS ON THIN WALL PART VIA LASER METAL-WIRE DEPOSITION

抄録

Laser metal-wire deposition (LMwD) is suitable for fabricating large-scale components and near-net shape with high deposition rates and low costs. However, uncontrollable mechanical properties of as-built samples are crucial problems that need to be investigated. In the present study, by discussing the microstructure of joint area between layers of Ti6Al4V thin wall as-built samples, the deposition regularity of LMwD is studied. The results show that the upper layer can re-melt the top side of the lower area and change its initial texture. The distribution of heat affected zone (HAZ) between layers is elucidated clearly. The provided data makes a stable and better microstructure and mechanical properties become possible.