In-situ X-ray study of phase transformations in Ti-Nb-based SMA under variable stress-temperature conditions: Preliminary results

摘要

The technique and preliminary results of in situ X-ray diffraction analysis of the martensitic transformation in the newly developed Ti-Nb-Zr SMA for biomedical application are presented. To perform the in situ analysis, an original tensile stage, powered by a Ti-Ni SMA actuator and fit within the "TTK450" thermal chamber of a "PANalytical X'Pert Pro" diffractometer is designed, manufactured and validated. The tensile stage working principle and analysis methodology are described in detail. Preliminary results obtained during in-situ X-ray analysis of the phase transformations in Ti-Nb-Zr SMA are also presented.