Table 3.
Strain fixity and strain recovery rates for cycle N = 1
| Sample ID* | εm, % | Thermally induced recovery |
Magnetically induced recovery |
||||
|---|---|---|---|---|---|---|---|
| εu(1), % | Rf(1), % | Rr(1), % | εu(1), % | Rf(1), % | Rr,mg(1), % | ||
| TFX000 | 50 | 50† | 100† | 80† | 50‡ | 100 | 0 |
| TFX050 | 50 | 49† | 98† | 81† | 59‡ | 118 | 38§ |
| TFX075 | 50 | 49† | 98† | 82† | 54‡ | 108 | 88 |
| TFX100 | 50 | 50† | 100† | 78† | 53‡ | 106 | 91 |
| PDC000¶ | 100 | 50 | 50 | 50∥ | 50 | 50 | 0 |
| PDC000¶ | 150 | 75 | 50 | 47∥ | 75 | 50 | 0 |
| PDC100¶ | 100 | 57 | 57 | 59∥ | 57 | 57 | 65 |
| PDC100¶ | 150 | 85 | 57 | 65∥ | 91 | 60 | 68 |
εu is the elongation achieved at stress zero after cooling to Tlow, Rf is the strain fixity rate, Rr is the strain recovery rate calculated according to Eqs. 1 and 2, and Rr,mg is the strain recovery rate obtained by inductive heating in the magnetic field.
*The three-digit number gives the particle content in wt % × 10.
†Cyclic thermomechanical experiments Thigh = 80°C; Tlow = 0°C.
‡Programming including deformation at Thigh = 80°C.
§Tswitch not completely reached.
¶Programming by cold-drawing.
∥Shape recovered at 55°C.