Pseudoelasticity in Fe₃Al single crystals

Multimode pseudoelasticity in Fe–23.8 at% Ga single crystals with D03 structure

“…During unloading, these APBs pulled back the superpartials due to their tension resulting in the pseudoelasticity. So, we call this phenomenon ''APB pseudoelasticity'' which was also observed in Fe 3 Al single crystals [8][9][10][11][12][13][14]. In the present study, however, in addition to the APB pseudoelasticity, transformation and twinning pseudoelasticities were observed to appear in D0 3 -ordered Fe-23.8 at% Ga single crystals with an appropriate heat treatment.…”

Effect of heat treatment on pseudoelasticity in Fe–25.0 at.% Al single crystals

“…During unloading, 1/4h111i superpartials moved back due to the surface tension of the NNAPB, which caused the pseudoelasticity. Kubin et al [2] and Langmaack and Nembach [3] performed in situ observations of the deformation microstructure by a transmission electron microscope (TEM) and observed the reversible motion of the superpartials during loading and unloading. The reason why 1/4h111i superpartials moved independently was that only the leading superpartials could pass through a specific type of ordered domain boundaries [5].…”

Temperature Dependence of Pseudoelasticity and Shape Memory Effect in Fe3Ga Single Crystals with D03 Structure

“…[4][5][6][7][8][9][10][11][12][13] During unloading, the APB pulls back the superpartials due to its tension, resulting in the pseudoelasticity. A schematic illustration of stress-strain curve and stress acting on the superpartials are shown in Fig.…”

“…However, the martensitic transformations of ferrous alloys are generally non-thermoelastic, and pseudoelasticity rarely takes place in the alloys. But recently, it was found that Fe 3 Al [2][3][4][5][6][7][8][9][10][11][12] and Fe 3 Ga 13) single crystals with the D0 3 structure ( Fig. 1(a)) exhibited giant pseudoelasticity regardless of martensitic transformation.…”

“…14,15) In contrast, mode I was chosen in Fe-23.0at%Al single crystals. [4][5][6][7][8][9][10][11][12] In this case, the leading superpartials moved back due to the tension of the NNAPB, which led to giant pseudoelasticity accompanied by recoverable strain as much as 5 %. On the other hand, mode II was also selected in Fe 3 Ga; the NNAPB and NNNAPB pulled back the superpartials during unloading, resulting in giant pseudoelasticity.…”