Cold Rolling Electrostimulation of Hard-Deform Alloys

Abstract:

On the example of shape memory alloys in coarse-grained and ultrafine-grained states there is demonstrated an influence of pulse current on deformation behavior, microstructure and mechanical properties during cold rolling. The combination of cold rolling with the introduction of a pulsed current stimulates an increase in the deformation ability and strong structural refinement into the region of nanograins in a hard-deformed shape memory TiNi alloy. For both coarse-grained and ultrafine-grained structural states, the maximum achievable one-time and the total degree of deformation are higher in the case of using a pulsed current. Subsequent annealing improves the strength and functional properties. It has been shown that effect of pulsed current on deformability during cold rolling is higher in an alloy with a high content of impurities.

• Periodical: Key Engineering Materials (Volume 910)
• Pages: 308-313
• DOI: https://doi.org/10.4028/p-fcq55e
• Online since: February 2022
• Authors: Vladimir Stolyarov*, Vasiliy Rubanik
• Keywords: Cold Rolling, Deformability, Grain Size, Microstructure, Pulse Current, Reactive Stress, Reversible Strain, Shape Memory Alloy, Strength

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