Work

Process Parameter and Dimension‐Dependent Mn Vaporization During Laser Powder Bed Fusion of an Fe–Mi–Si–Cr‐Based Shape Memory Alloy

Year: 2025

Type: article

Abstract: The functional properties of Fe–Mn–Si–Cr‐based shape memory alloys (SMAs) are, among other factors, strongly dependent on their chemical composition. In the present study, Mn vaporization during laser powder bed fusion of a Fe–Mn–Si–Cr‐based SMA is analyzed. Here, the process parameters laser power, hatch, and scan speed are modified, and process conditions like the interlayer time changed. The individual process parameters show noninterchangeable contributions to the Mn vaporization, showcasing the limits of the volume energy density and line energy as encompassing parameters for vaporization description. Differing Mn vaporization along the build direction of the sample and within a sample plane is demonstrated. It is shown that the interlayer time can have a substantial impact on Mn vaporization. With the used changes, fully austenitic (fcc) samples and samples with a mainly ferritic (bcc) microstructure are produced.

Source: Advanced Engineering Materials

DOI: 10.1002/adem.202500327

Authors: Maylin Homfeldt, Anastasiya Toenjes

Institutions: Leibniz-Institut für Werkstofforientierte Technologien - IWT, University of Bremen

Language: English

Topic: Additive Manufacturing Materials and Processes

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,520

Funder: Leibniz-Gemeinschaft