Abstract

Preserving the shape memory effect (SME) and superelasticity (SE) in shape memory alloys (SMAs) after a joining process is of great importance. In this work Ni-rich NiTi SMAs were laser welded using a Nd:YAG laser in continuous mode. A detailed structural characterization was carried by means of X-ray diffraction (XRD). It was possible to observe the existence of a microstructural gradient from the base material (BM), which contained only austenite, through the heat affected zone (HAZ) and the fusion zone (FZ), where both zones contained austenite and martensite. The mechanical behavior under cyclic load/unload of the welded samples may be explained taking in consideration the structural information retrieved from the XRD analysis.

Original languageEnglish
Title of host publicationEuropean Symposium on Martensitic Transformations, ESOMAT 2012
EditorsSergey Prokoshkin, Natalia Resnina
PublisherTrans Tech Publications Ltd
Pages338-343
Number of pages6
ISBN (Print)9783037856109
DOIs
Publication statusPublished - 25 Feb 2013
Event9th European Symposium on Martensitic Transformations, ESOMAT 2012 - Saint-Petersburg, Russian Federation
Duration: 9 Sep 201216 Sep 2012

Publication series

NameMaterials Science Forum
PublisherTrans Tech Publications Ltd
Volume738-739
ISSN (Print)0255-5476

Conference

Conference9th European Symposium on Martensitic Transformations, ESOMAT 2012
CountryRussian Federation
CitySaint-Petersburg
Period9/09/1216/09/12

Keywords

  • Laser welding
  • Shape memory alloys
  • X-ray diffraction

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  • Cite this

    Fernandes, F. M. B., Mahesh, K. K., Craciunescu, C. M., Oliveira, J. P., Schell, N., Miranda, R. M., ... Ocaña, J. L. (2013). In situ structural characterization of laser welded NiTi shape memory alloys. In S. Prokoshkin, & N. Resnina (Eds.), European Symposium on Martensitic Transformations, ESOMAT 2012 (pp. 338-343). (Materials Science Forum; Vol. 738-739). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.738-739.338