Deformation‐Induced Supersaturation in Immiscible Material Systems during High‐Pressure Torsion

Abstract

The review focuses on the supersaturation process of immiscible elements induced by high-pressure torsion deformation. A variety of investigated material systems offers the systematic analysis of the controlling factors for mechanical intermixing, which are mainly determined by the level of the positive heat of mixing and the deformation behavior. The homogeneity of the deformation process strongly influences the degree of supersaturation. Our results show that the fundamental mixing mechanism during deformation is not necessarily the same in all systems, but depends also on the strength differences of the phases and accordingly the deformation behavior.

Impact of interfaces on the radiation response and underlying defect recovery mechanisms in nanostructured Cu-Fe-Ag

“…1b)) [40]. The SPD applied to the material results in a supersaturated single-phase of the normally immiscible components [61,62], as was also observed for ball-milled material samples in the Cu-Fe-Ag Fig. 1.…”

New Mg–V–Cr BCC Alloys Synthesized by High-Pressure Torsion and Ball Milling

“…Recently, application of SPD through the high-pressure torsion (HPT) process 15,16) showed a high potential to synthesize new composites, 17,18) intermetallics, 19,20) alloys 21,22) and hydrogen storage materials 23) even in the immiscible Mg-based systems such as MgTi, 24) MgZr, 25) MgV 10) and MgNiPd. 26) The HPT method is not only a powerful route to synthesize bulk samples from powders 27,28) but also an effective method to enhance the kinetics, 27) activation 4) and long-term performance 30) of hydrogen storage materials.…”

Strain Induced Segregations in Severely Deformed Materials

“…There are situations where SPD leads to mechanical mixing and the formation of super saturated solid solutions in multi-phase metallic alloys, 57,58) but there are also situations where super saturated solid solutions decompose during SPD. 41,42,59,60) In the latter case, the initial material is single phase and the super saturated solid solution is usually obtained by quenching from high temperature where it is stable.…”