Cyclic High Pressure Torsion of Nickel and Armco Iron

Florian Wetscher (1, 2) , Reinhard Pippan (1, 3)

1 ESI - Erich Schmid Institute of Materials Science
2 CD-Laboratory for Local Analysis of Deformation and Fracture
3 CD-Laboratory of Local Analysis of Deformation and Fracture

Cyclic high pressure torsion, a modified version of High Pressure Torsion, is applied to Armco-iron and nickel. The results in terms of microstructure and flow stress are compared to samples deformed by conventional high pressure torsion. For both processes and both materials, a saturation in the decrease of the structure size and the increase in the flow stress is observed. The minimum size of the structural elements which is obtainable is smallest for the conventionally high pressure torsion deformed samples and increases with decreasing strain per cycle in cyclic high pressure torsion.

Mots clés: Physical Sciences

Florian Wetscher, Reinhard Pippan. Cyclic High Pressure Torsion of Nickel and Armco Iron. Philosophical Magazine, 2006, 86 (36), pp.5867-5883. ⟨10.1080/14786430600838288⟩. ⟨hal-00513723⟩