Extensive work has been reported on the microstructure of laser-welded NiTi alloys either superelastic or with shape memory effect, motivated by the fact that the microstructure affects the functional properties. However, some effects of laser beam/material interaction with these alloys have not yet been discussed. This paper aims to discuss the mechanisms for the occurrence of martensite in the heat-affected zone and in the fusion zone at room temperature, while the base material is fully austenitic. For this purpose, synchrotron radiation was used together with a simple thermal analytic mathematical model. Two distinct mechanisms are proposed for the presence of martensite in different zones of a weld, which affects the mechanical and functional behavior of a welded component.

Original languageEnglish
Pages (from-to)114-120
Number of pages7
JournalShape Memory and Superelasticity
Issue number1
Publication statusPublished - 1 Mar 2016


  • Laser welding
  • Martensite
  • NiTi
  • Precipitation phenomena
  • Synchrotron radiation
  • X-ray diffraction


Dive into the research topics of 'On the Mechanisms for Martensite Formation in YAG Laser Welded Austenitic NiTi'. Together they form a unique fingerprint.

Cite this