Abstract
Synchronous-hammer-forging has been proved to be an effective method to control the microstructure and properties of metal components in additive manufacturing, but the influence of the intervention temperature is still unclear. 316L stainless steel samples with different hammer-forging intervention temperature were prepared by laser directed energy deposition (LDED) technology. The results show that due to dynamic recrystallization and dislocation accumulation effect, the grain size of the component decreases first and then increases with the increase of hammer-forging temperature, while the dislocation density and tensile strength increase first and then decrease.
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