ANALYSIS OF LASER METAL DEPOSITION PROCESS AGAINST DIFFERENCE INTENSITY MODELS

Abstract

Laser Direct Metal deposition (LDMD) is an additive manufacturing process, it is used to manufacture complex 3D objects directly from CAD files. Laser creates melt region on surface of substrate and powder material blown on to the laser-induced melt pool to form a layer. After a layer deposition, nozzle and laser assembly raised vertically upward by calculated small increment. Next layer is built on previous one, thus a 3D part is built layer by layer. Commercial available finite element tool ansys 14.0 is used to develop a numerically simulate heat transfer and coupled thermal phenomena to analyse the influence of various parameters (laser power, feed rate, laser velocity, etc.) on thermal history. Thermal cycles and its history experienced at different locations are studied and its influence is analysed. Influence of thermal loading on the model’s distortion is analysed. As laser passed by the material the overall temp of the model is keep on increasing. Intensity distribution like Gaussian shoot the peak temperature of the subject higher than the distribution like frustum.