Effect of layer thickness variation on mechanical properties of WC-reinforced 316L stainless steel graded structures fabricated via laser powder bed fusion
Source abstract
Abstract
316L stainless steel (316L SS) faces limitations in its application due to inadequate strength. While incorporating high-strength ceramic particles can significantly enhance tensile strength via second-phase strengthening, the inherent brittleness of ceramics often severely compromises elongation. Fabricating ceramic/316L SS gradient layered structures (GLS) via laser powder bed fusion (LPBF) offers a promising route to synergistically improve both strength and ductility. This study aims to elucidate the influence of alternating layer thickness, a key structural parameter, on microstructural evolution and mechanical properties. To this end, GLS specimens consisting of alternating 2 wt.% WC/316L SS composite layers and pure 316L SS layers were fabricated by LPBF, with material switching intervals of 5, 7, and 10 layers. The results demonstrate that the specimen with a 7-layer interval achieves the optimal comprehensive performance, featuring the smallest average grain size (∼16.1 μm) and a superior strength-ductility balance (ultimate tensile strength: 816.5 MPa, elongation: 49.5%). This work elucidates the systematic regulatory role of alternating layer thickness, providing a theoretical basis and practical guidance for designing high-performance gradient materials via LPBF.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · High Entropy Alloys Studies · Welding Techniques and Residual Stresses
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (71)
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