An investigation of the γ → α martensitic transformation in uranium alloys

Large Strain Deformation in Uranium 6 Wt Pct Niobium

“…[1] On cooling, uranium experiences a solid-solid phase transformation to the tetragonal b phase followed by a second transformation to an orthorhombic a phase, which is stable at room temperature. To improve mechanical properties of uranium at room temperature while maintaining the high density, attempts were made to alloy with other elemental metals such as Mo, [2,3] Nb, [4] Zr, [5] and Ti, [6,7] each of which is soluble in the high-temperature c phase. Although these elements have minimal solubility in the b or a phases of uranium, metastable alloys can be formed through rapid quenching from the high-temperature c phase.…”

Uniaxial tensile deformation of uranium 6 wt pct niobium: A neutron diffraction study of deformation twinning

“…To stabilize the ␥ phase at SME in both the ␣ Љ and ␥ 0 phases, although larger strain room temperature, attempts have been made to alloy uranium recovery was observed in the ␣ Љ phase. [14] In the case of Uwith other elemental metals such as Mo, [2,3] Nb, [4] Zr, [5] and Nb alloys in the ␣ Љ phase, strain recovery of up to ϳ 0.07 Ti, [6,7] each of which is soluble in the high-temperature ␥ is realized by unloading ( ϭ 0.025) and heating to ϳ1100 phase. Although these elements have minimal solubility in K ( ϭ 0.045).…”

Effects of Ni Addition on the Microstructures and Magnetic Properties of Fe70-xPd30NixHigh-Temperature Ferromagnetic Shape Memory Alloys

“…4(c), in which the bright contrast also represents martensitic L1 0 twin structures. The abovementioned L1 0 martensitic twins provide a lattice invariant shear for maintaining an invariant habit plane [6][7][8]; therefore, they are expected to contribute to higher magnetostriction in the alloys for use in magnetomechanical applications (such as for microactuators or springs). Figure 4(d) is a bright field (BF) image, with the transverse twin indicated by an arrow.…”