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<p>A novel metal-fused filament fabrication (MFFF) process was employed to create a metal part using SS316L filament, consisting of stainless steel and polylactic acid (weight ratio 85:15). Three-dimensional metallic parts were fabricated using the MFFF printer, followed by debinding and sintering processes. The sintering temperature has a vital role in determining the surface integrity properties. Three different temperatures such as 850&#xa0;°C, 1100&#xa0;°C, and 1350&#xa0;°C were selected to examine the surface integrity properties of MFFF-printed SS316L. Poor inter-layer bonding affects anisotropy, limiting broader application of the MFFF technique. The specimen sintered at 850&#xa0;°C exhibited lower density of 3.7&#xa0;g/cm<sup>3</sup> due to porous formation. In contrast, the formation of equiaxed austenite grains at 1350&#xa0;°C enhanced density. Nanoindentation tests assessed deformation recovery, stiffness and hardness at indentation loads of 500, 750, and 1000 µN. Results of the study detailed the relation of density and indentation behavior of MFFF-printed SS parts.</p>

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Experimental Investigation on Surface Integrity Properties of SS316L Developed using Metal-Fused Filament Fabrication Process

  • 期刊论文

  • 发表日期：

    2025年7月22日

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  • P. Vijaya Kumar,
  • C. Velmurugan

摘要

A novel metal-fused filament fabrication (MFFF) process was employed to create a metal part using SS316L filament, consisting of stainless steel and polylactic acid (weight ratio 85:15). Three-dimensional metallic parts were fabricated using the MFFF printer, followed by debinding and sintering processes. The sintering temperature has a vital role in determining the surface integrity properties. Three different temperatures such as 850 °C, 1100 °C, and 1350 °C were selected to examine the surface integrity properties of MFFF-printed SS316L. Poor inter-layer bonding affects anisotropy, limiting broader application of the MFFF technique. The specimen sintered at 850 °C exhibited lower density of 3.7 g/cm3 due to porous formation. In contrast, the formation of equiaxed austenite grains at 1350 °C enhanced density. Nanoindentation tests assessed deformation recovery, stiffness and hardness at indentation loads of 500, 750, and 1000 µN. Results of the study detailed the relation of density and indentation behavior of MFFF-printed SS parts.