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Study on the Mechanical and Material Properties of Metal 3D Printing Specimens by FDM

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Abstract:

In this study, 17-4PH precipitation-hardening stainless steel specimens were fabricated via FDM metal 3D printing followed by debinding and sintering. The effects of printing pattern (cubic, linear, and grid) and infill density (90% and 100%) on mechanical performance and porosity were systematically investigated. Experimental results indicate that printing parameters have a significant influence on mechanical performance, with different properties exhibiting varying sensitivities to process conditions. Hardness is strongly affected by printing pattern and infill density; the cubic lattice path combined with 90% infill density achieved the highest hardness of 52.52 HRB, suggesting enhanced densification and internal structural uniformity after sintering. Tensile test results show that the grid printing pattern with 90% infill density provides superior mechanical performance, yielding a maximum tensile load of 1895.33 kgf and an elongation of 6.07 mm, indicating improved ductility. Yield strength and Poisson’s ratio analysis further reveal a maximum yield strength of 228.825 kgf and a Poisson’s ratio of 0.697 under the same conditions. Porosity analysis demonstrates that the linear printing pattern at 100% infill density produces the lowest porosity of 30.80%. Although higher infill density effectively reduces porosity, the overall mechanical behavior of FDM-printed and sintered 17-4PH specimens exhibits characteristics typical of brittle materials. These findings provide valuable insights for optimizing FDM process parameters in metal additive manufacturing.

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Info:

Periodical:

Advances in Science and Technology (Volume 180)

Pages:

75-80

DOI:

https://doi.org/10.4028/p-EEwie2

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Online since:

July 2026

Authors:

Chin Kuei Lin*, Shie Chen Yang, Wen Ko Liang, Wei You Hong, Yi Siang Wang

Keywords:

Fuse Deposition Modeling (FDM), Hardness, Metal 3D Printing, Porosity, Tensile

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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