|
|||||
|
|
Effect of atomic order on the martensitic transformation of Ni–Fe–Ga alloys |
|
| Authors: | R Santamarta E Cesari J Font J Muntasell J Pons J Dutkiewicz |
| Affiliation: | aDepartament de Física, Universitat de les Illes Balears, Ctra. de Valldemossa, km 7.5, E07122 Palma de Mallorca, Illes Balears, Spain bDepartament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Avda. Diagonal, 647, E08028 Barcelona, Spain cInstitute of Metallurgy and Materials Science, Ul. Reymonta, 25, 30-059 Kraków, Poland |
| Abstract: | The effect of atomic order on martensitic transformation (MT) temperatures has been studied by differential scanning calorimetry in three polycrystalline alloys with compositions Ni53.5+x–Fe19.5?x–Ga27.0 (x = 0, 0.5 and 1.5). Samples water quenched from different temperatures (470–1070 K) exhibit higher MT temperatures than ones slow cooled from the same temperature. This effect has been ascribed to a decrease of the L21 degree of order of the austenitic phase, which promotes an increase in the MT temperatures in these Ni–Fe–Ga alloys. The differences in ordering with cooling rate have been qualitative confirmed by electron diffraction patterns. |
| Keywords: | Shape memory alloys (SMA) Ni–Fe–Ga alloys Martensitic phase transformation Ordering |
| 本文献已被 ScienceDirect 等数据库收录！ | |
