Characterization of the Mechanical Properties of Maraging 300 Alloy Produced by Selective Laser Melting Additive Manufacturing Method Used Digital Image Correlation Technique

Document Type : Original Article

Authors
1 Space Transportation Systems Engineering Research Group,, Space Transportation Research Institute, Iranian Space Research Center
2 Department of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
Abstract
Studying the parameters that influence additive manufacturing and determining the optimal conditions for part production is a complex challenge. Research is actively focused on understanding how process conditions affect the evolution of microstructure and the resulting mechanical properties of fabricated components. A study was conducted to investigate the effect of selective laser melting additive manufacturing process parameters on the mechanical properties of Maraging 300 steel samples. The mechanical properties were determined using 2D digital image correlation on flat tensile samples (in accordance with the ASTM E8 standard). Laser scanning speed (70, 100 mm/s), hatch distance (100, 150, 200 μm), and layer thickness (20, 40 μm) were evaluated for their effects on mechanical properties. The desired mechanical properties were extracted using the digital image correlation test, a non-contact optical method for measuring mechanical properties. According to the results of the study, the laser scanning speed significantly influences the mechanical properties of samples more than other additive manufacturing parameters according to the relationship between the selected parameters and the laser energy density and their effect on the molten pool. Based on the results, the optimal sample is made with a scanning speed of 70 mm/s, a hatch distance of 200 μm, and a layer thickness of 20 μm. This sample has a yield strength of 1785 MPa, an ultimate strength of 1816 MPa, an elongation of 17.4%, and a Poisson ratio of 0.34.
Keywords
Subjects

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Volume 4, Issue 2
March 2025
Pages 37-48

  • Receive Date 02 April 2024
  • Revise Date 24 June 2024
  • Accept Date 20 November 2024