J. Phys. IV France 05 (1995) C8-527-C8-530
The Effect of Thermomechanical Training on the Microstructures of Fe-Mn-Si Shape Memory AlloyD.F. Wang1, Y.R. Chen2, F.Y. Gong2, D.Z. Liu1 and W.X. Liu1
1 Analysis Centre, Tianjin University, Tianjin 300072, P.R. China
2 Department of Materials Science and Engineering, Tianjin University, Tianjin 300072, P.R. China
The shape memory effect and the microstructures of Fe-30Mn-6Si(wt%) alloy subjected to different training treatments have been studied in present paper. It has been found that the recovery strain increases significantly through the training treatment of 4% tensile pre-strain followed by recovery annealing at 700°C (treatment A) while the recovery strain decreases after the training treatment of 4% tensile pre-strain plus recovery annealing at 300 °C (treatment B). The microstructures of the alloy after the above training treatments were investigated by TEM. It was found that the treatment A favoured the formation of oriented dislocations and stacking faults which results in the improvement of shape memory effect in Fe-Mn-Si alloy.
© EDP Sciences 1995