TypeArticle
TitleEnhancing wear resistance using selective laser melting (SLM): Influence of scanning strategy
SourceJurnal Tribologi 23 (2019) 113-124
AuthorYang Yang, Yi Zhu, Huayong Yang

Abstract

In selective laser melting (SLM), process parameters, such as laser power, hatch space, and scanning speed, greatly affect part properties. Wear resistance is crucial for many functional parts, which is usually enhanced by post processing for SLMed parts. Those post processing are efficient but are not always accessible due to very complex structures or limited manufacturing time. Therefore, it is important to enhance the wear resistance during SLM process by actively control the microstructures. The paper studied the influence of scanning strategy on the microstructures and wear resistance. Three scanning strategies, “zigzag”, parallel remelting, and perpendicular remelting, were used to fabricate 316L stainless steel samples using SLM. The microstructures of samples were characterized and the hardness was measured. The scratch depths under 1, 3, and 5 N were measured and the scratch track morphologies were examined. Results indicate that the hardness and wear resistance can be enhanced by using remelting due to the refined microstructures resulted from remelting. The part produced using perpendicular remelting strategy has the highest hardness and the lowest scratch depth due to a fiber texture.


Content

Jurnal Tribologi 23 (2019) 113-124