Superelastic response of a single crystalline FeMnAlNi shape memory alloy under tension and compression

Effects of B2 nanoprecipitates on the phase stability and pseudoelastic behavior of Fe-Mn-Al-Ni shape memory alloys

“…The presence of B2 precipitates is a necessary condition for the development of the pseudoelastic effect in Fe-MnAl-Ni alloys [16,17]. They play, at least, two main roles.…”

The effect of precipitates on the superelastic response of [1 0 0] oriented FeMnAlNi single crystals under compression

“…Unfortunately, most Fe-based SMAs exhibit poor superelastic recovery or small superelastic strains, due to non-thermoelastic martensitic transformation [1][2][3][4][5][6][7], which also results in large temperature and stress hysteresis. Recently, a group of newly discovered Fe-based SMAs: Fe 41.95 Ni 28 Co 17 Al 10.5 X 2.5 B 0.05 (X: Ta, Nb and Ti) polycrystalline alloy [8][9][10], Fe 40.5 Ni 28 Co 17 Al 11.5 X 2.5 (X: Ta, Nb and Ti) single crystals [11][12][13][14][15][16][17][18][19][20][21][22][23], Fe 43.5 Mn 34 Al 15 Ni 7.5 polycrystalline alloy [24] and single crystals [25], have shown large superelastic strain at room temperature. One of the most interesting findings for the Fe 43.5 Mn 34 Al 15 Ni 7.5 SMA was the small tensile stress-temperature slope of about 0.53 MPa/°C in polycrystalline samples and 0.54 MPa/°C in single crystals, with the [1 0 0] orientation, over a large temperature window [24,25].…”

First Principles and Monte Carlo Calculations of Structural and Magnetic Properties of FexNi2-xMn1+yAl1-yHeusler Alloys

“…Recent experiments have shown that the substitution of 7.5% of Fe for Ni in the Fe 51 Mn 34 Al 15 results in an enhancement of the superelastic behavior observed over a wide temperature range from 77 to 513 K [9][10][11]. A good room-temperature strength and a significant ductility was found in the Fe 30 Ni 20 Mn 35 Al 15 alloy with a higher Ni content [7,8].…”

“…(Fig. 4a) showing the promising magnetocaloric and superelastic properties [9][10][11]. Here and further, the positive exchange constants (J ij > 0) are characterized the FM coupling, whereas the negative ones (J ij < 0) point to the antiferromagnetic (AF) coupling.…”