Nanostructured Shape Memory TiNi Alloy Processed by Severe Electroplastic Deformation

Vladimir V. Stolyarov

doi:10.4028/www.scientific.net/MSF.584-586.507

Paper Titles

Effect of Processing Temperature on Microstructure Development during ECAP of Al-Mg-Sc Alloy
p.481

Effects of Equal-Channel Angular Pressing on the Anisotropy of Ultrafine Copper and Titanium
p.487

Strain Gradient Hardening and Pressure Induced Phase Transformation of Metals by HPT
p.493

Effect of Pre-Aging on the Microstructure and Strength of Supersaturated AlZnMg Alloys Processed by ECAP
p.501

Nanostructured Shape Memory TiNi Alloy Processed by Severe Electroplastic Deformation
p.507

Texture Gradient in a Single Pass ECAPed Pure Mg by Neutron Radiation
p.513

Life Time Predictions through X-Ray Defect Analysis of MEMS Devices
p.518

Effect of the Second Phase on the Microstructure of Magnesium Alloys during Cyclic Extrusion Compression
p.523

Grain Boundary Structure and Deformation Defects in Nanostructured Al–Mg Alloys Processed by High Pressure Torsion
p.528

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Nanostructured Shape Memory TiNi Alloy Processed by Severe Electroplastic Deformation

Abstract:

Electropulse current effect during cold rolling on deformability, nanostructure formation and mechanical behavior in coarse-grained (CG) and ultrafine-grained (UFG) TiNi alloys enriched by nickel is investigated. The UFG sample subjected to cold rolling with current has a fracture strain (е = 1.91) which is higher than that without a current (е = 0.59). As a result of cold rolling with a current and a subsequent annealing at 400-450 °C, nanostructure is formed in both alloys, which leads to a significant enhancement of yield and ultimate stresses. It has been shown that the efficiency of electroplastic rolling depends on the purity of the alloys.