Precision additive manufacturing of NiTi parts using micro direct metal deposition

Authors and full affiliations: Saeed Khademzadeh -1 Filippo Zanini -2 Paolo F. Bariani -1 Simone Carmignato -2 1.Department of Industrial Engineering, University of Padova, Padova-Italy 2.Department of Management and Engineering, University of Padova, Vicenza-Italy

Keywords: Direct metal deposition, Micro manufacturing, Micro computed tomography

Methodology: Powder injection coaxial with laser beam such as direct metal deposition (DMD) + scanning electron microscopy and micro X-ray computed tomography (μCT).

Findings: Acting on the scanning speed, the surface quality of parts improves.

Limitations: - increasing the scanning speed inhibits the growth rate in the building direction.

Benefits: - By using micro direct metal deposition process and specific set of process parameters, feature sizes can be reduced without losing the accuracy, as well as surface finish and density can be improved.

Practical implications: μDMD process was used to produce NiTi parts with predetermined cylindrical holes via tuning of process parameters such as hatch distances and laser spot diameter.

Full reference: KHADEMZADEH S., ZANINI, F., BARIANI, P.F. et al. Int J Adv Manuf Technol (2018) 96: 3729.

Publisher Name: Springer London

Links: https://link.springer.com/article/10.1007/s00170-018-1822-3#enumeration; https://doi.org/10.1007/s00170-018-2268-3