Two-Stage Martensitic Transformation in NiTi Alloys Caused by Stress Fields H. Morawiec, J. Ilczuk, D. Stróz, T. Goryczka and D. Chrobak J. Phys. IV France, 07 C5 (1997) C5-155-C5-159 DOI: 10.1051/jp4:1997524