Influence of Process Parameters on Porosity and Hot Cracking of AISI H13 Fabricated by Laser Powder Bed Fusion

Laser powder bed fusion is an attractive manufacturing technology promising novel components for the aircraft, automobile, and medical industries. However, depending on material, some defects in parts, especially pores or microcracks, cannot be avoided LPBF process. To achieve a part with low defect density, optimal parameter sets must determined. Many investigations have focused how laser speed power influence melting process relative density of as-built parts. In this study, we considered heated beds as two energy input sources, represented by volume preheating temperature, respectively. The interaction these inputs fabrication AISI H13 was investigated. It found that high temperatures shifted from area to area. addition, also led hot cracking, which confirmed Scheil solidification simulations.