Microstructural characterization of laser micro-welded Nitinol wires

Peng Dong, Hongmei Li, Wenxian Wang, Jun Zhou

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Laser micro-welding has been considered one of the most promising joining methods of manufacturing Nitinol biomedical devices. However, there is still a lack of understanding about how laser micro-welding influences the microstructure. This work attempts to reveal the phase content within various microstructural zones of laser micro-welded crossed Nitinol wires by transmission electron microscopy (TEM) with the assistance of the focused ion beam (FIB) technique. The base metal is composed of a single austenite phase (B2). The fusion zone exhibits the coexistence of austenite matrix and several intermetallics (T2Ni, TiNi3 and Ti3Ni4). The precipitation of R-phase was observed in HAZ with B2 matrix due to thermally induced stresses during welding.

Original languageEnglish (US)
Pages (from-to)40-45
Number of pages6
JournalMaterials Characterization
Volume135
DOIs
StatePublished - Jan 1 2018

Fingerprint

welding
Welding
wire
Wire
austenite
Austenite
Lasers
lasers
heat affected zone
Focused ion beams
matrices
Joining
Intermetallics
intermetallics
Fusion reactions
manufacturing
fusion
Metals
ion beams
Transmission electron microscopy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Dong, Peng ; Li, Hongmei ; Wang, Wenxian ; Zhou, Jun. / Microstructural characterization of laser micro-welded Nitinol wires. In: Materials Characterization. 2018 ; Vol. 135. pp. 40-45.
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Microstructural characterization of laser micro-welded Nitinol wires. / Dong, Peng; Li, Hongmei; Wang, Wenxian; Zhou, Jun.

In: Materials Characterization, Vol. 135, 01.01.2018, p. 40-45.

Research output: Contribution to journalArticle

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