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This study explores the effect of processProcess parameters on the shape and microstructural characteristics of single tracks of bimetalBimetal printing using Laser Powder Bed FusionLaser Powder Bed Fusion (LPBF) (L-PBF) technology. For this purpose, two different configurations of single tracks of maraging steel (M300)Maraging steel (M300) and copper alloy (C18150)Copper alloy (C18150) bimetalBimetal were printed using laser scan velocities of 500–1100 mm/s and powers ranging from 300 to 550 W. The effect of these processProcess parameters on single tracks was analysed quantitatively by measuring width, depth, and height of the track deposits. In addition, the interfacial characteristics of single tracks were investigated using SEMScanning Electron Microscopy (SEM). It was found that both track deposit width and depth decrease with increasing laser scan velocity. On the other hand, an opposite trend for the track deposit width and depth was noticed with the increase of laser power. In addition, microstructural analysis reveals turbulence within the melt poolMelt pool, especially at the interfaceInterface where traces of Marangoni flowMarangoni flow were also observed. The optimum processProcess parameters for both configurations were identified. In general, the printing of C18150 on M300Maraging steel (M300) is challenging as the tracks form in droplets for higher velocities. The results from these findings could contribute to building volume samples with minimum defect formation, resulting in improving mechanical propertiesMechanical properties of L-PBF printed parts.

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Bimetal Printing M300-C18150: Single Track Topology and Interfacial Characterization

  • 会议论文

  • 发表日期：

    2026年

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  • Tahir Abbas,
  • Shahrooz Nafisi,
  • Ling Chen,
  • Geoff de Looze,
  • David Ritchie,
  • Daniel East,
  • Reza Ghomashchi

摘要

This study explores the effect of processProcess parameters on the shape and microstructural characteristics of single tracks of bimetalBimetal printing using Laser Powder Bed FusionLaser Powder Bed Fusion (LPBF) (L-PBF) technology. For this purpose, two different configurations of single tracks of maraging steel (M300)Maraging steel (M300) and copper alloy (C18150)Copper alloy (C18150) bimetalBimetal were printed using laser scan velocities of 500–1100 mm/s and powers ranging from 300 to 550 W. The effect of these processProcess parameters on single tracks was analysed quantitatively by measuring width, depth, and height of the track deposits. In addition, the interfacial characteristics of single tracks were investigated using SEMScanning Electron Microscopy (SEM). It was found that both track deposit width and depth decrease with increasing laser scan velocity. On the other hand, an opposite trend for the track deposit width and depth was noticed with the increase of laser power. In addition, microstructural analysis reveals turbulence within the melt poolMelt pool, especially at the interfaceInterface where traces of Marangoni flowMarangoni flow were also observed. The optimum processProcess parameters for both configurations were identified. In general, the printing of C18150 on M300Maraging steel (M300) is challenging as the tracks form in droplets for higher velocities. The results from these findings could contribute to building volume samples with minimum defect formation, resulting in improving mechanical propertiesMechanical properties of L-PBF printed parts.