Tensile actuation response of additively manufactured nickel-titanium shape memory alloys

abstract

• 2017 Acta Materialia Inc. In the present work, we characterize the tensile shape memory actuation behavior of NiTi shape memory alloys (SMAs) fabricated using laser powder bed fusion (L-PBF) additive manufacturing process. The samples were fabricated using two different sets of processing parameters. While reversible tensile shape memory behavior was observed in both cases, the samples fabricated with a shorter hatch spacing exhibited higher transformation temperatures, lower actuation strain, and lower irrecoverable strain compared to the samples fabricated with wider hatch spacing. The actuation strain and ductility of the L-PBF samples were lower than that of the conventionally manufactured NiTi SMA samples.

authors

• Elwany, Alaa Mohamed
• Karaman, Ibrahim

published proceedings

• SCRIPTA MATERIALIA

altmetric score

• 0.75

author list (cited authors)

• Sam, J., Franco, B., Ma, J., Karaman, I., Elwany, A., & Mabe, J. H.

citation count

• 60

complete list of authors

• Sam, J||Franco, B||Ma, J||Karaman, I||Elwany, A||Mabe, JH

publication date

• January 2018

publisher

• Elsevier  Publisher

published in

• Scripta Materialia  Journal

keywords

• Actuation
• Additive Manufacturing
• NiTi
• Selective Laser Melting
• Shape Memory Alloys

Digital Object Identifier (DOI)

• 10.1016/j.scriptamat.2017.11.013

start page

• 164

end page

• 168

volume

• 146

URL

• http://dx.doi.org/10.1016/j.scriptamat.2017.11.013