Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7969454 | Materials Characterization | 2018 | 6 Pages |
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Peng Dong, Hongmei Li, Wenxian Wang, Jun Zhou,