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 language | English (US) |
|---|---|
| Pages (from-to) | 40-45 |
| Number of pages | 6 |
| Journal | Materials Characterization |
| Volume | 135 |
| DOIs | |
| State | Published - Jan 1 2018 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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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 journal › Article
TY - JOUR
T1 - Microstructural characterization of laser micro-welded Nitinol wires
AU - Dong, Peng
AU - Li, Hongmei
AU - Wang, Wenxian
AU - Zhou, Jun
PY - 2018/1/1
Y1 - 2018/1/1
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=85034033156&partnerID=8YFLogxK
U2 - 10.1016/j.matchar.2017.11.022
DO - 10.1016/j.matchar.2017.11.022
M3 - Article
AN - SCOPUS:85034033156
VL - 135
SP - 40
EP - 45
JO - Materials Characterization
JF - Materials Characterization
SN - 1044-5803
ER -