4D manufacturing of intermetallic SMA fabricated by SLM process

Igor Shishkovsky, Vladimir Scherbakov

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Citations (Scopus)

Abstract

In the present report, we demonstrate how Selective laser melting (SLM) process can contribute to a 4D manufacturing of functional and structural properties of shape memory alloys (SMAs) in-situ synthesized into Ni-Ti and Cu-Al-Ni powdered systems. Correlations of specific resistance and phase structure in Ni-Ti and Cu-Al-Ni intermetallic phases after the SLM were experimentally observed. It was shown that electrical resistivity of the phases studied (austenite, rhombohedral and martensite phases) increases with temperature but the slopes are quite different. Intermediate R-phase in nitinol (NiTi-intermetallide) shows generally higher electrical resistivity than the austenite phase, but its value grows with the decrease of temperature for laser melted samples. We explained this fact by an accumulation of dislocation with the continuous increase of the R-phase with the decrease of temperature. Hysteresis loop of the electrical resistivity and phase-structural properties of SL-Melted samples are correlated with conditions of SLM process, additional heating during the layerwise process, 3D part's porosity. It will be important for perspective 4D printed biomedical applications (bio-MEMS-sensors, drug delivery systems, implants, etc.) of fabricated self-self-initiating and self-fixing SMAs.

Original languageEnglish
Title of host publicationLaser 3D Manufacturing V
EditorsHenry Helvajian, Alberto Pique, Bo Gu
PublisherSPIE
ISBN (Electronic)9781510615311
DOIs
Publication statusPublished - 2018
Externally publishedYes
Event5th Meeting of Laser 3D Manufacturing - San Francisco, United States
Duration: 29 Jan 20181 Feb 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10523
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference5th Meeting of Laser 3D Manufacturing
Country/TerritoryUnited States
CitySan Francisco
Period29/01/181/02/18

Keywords

  • 4D printing
  • bio-MEMS-bio-electromechanical systems
  • selective laser melting (SLM)
  • shape memory alloy (SMA)

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