High-Pressure Torsion for Ring Samples in Different Thicknesses

Hideaki Iwaoka; Yosuke Harai; Z. Horita

doi:10.4028/www.scientific.net/MSF.667-669.51

Paper Titles

Severe Plastic Deformation Processes with Friction Induced Shear
p.25

Twist Extrusion: Fundamentals and Applications
p.31

Equal-Channel Angular Pressing of NiAl
p.39

Strain Compatibility and Nanostructuring of Bulk Metallic Materials via Severe Plastic Deformation
p.45

High-Pressure Torsion for Ring Samples in Different Thicknesses
p.51

Comparison of Different Extrusion Methods for Compaction of Powders
p.57

Nanostructured Dual Phase Ti-Al through Consolidation of Particles by Severe Plastic Deformation
p.63

Effect of a Special ECAP Die Configuration on Microhardness Distributions in Pure Aluminum
p.69

Finite Element Simulation of Die Design for Warm Equal Channel Angular Extrusion Process of AZ31 Alloy and its Experimental Investigation
p.75

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High-Pressure Torsion for Ring Samples in Different Thicknesses

Abstract:

High-pressure torsion (HPT) was conducted with ring samples of pure Al (99.99%) having different thicknesses. They were cut from an Al plate with 10 mm thickness to dimensions having inner and outer diameters of 23 and 30 mm with thicknesses of 2 mm or 4 mm. HPT was conducted at room temperature under a pressure of 1 GPa at a rotation speed of 1 rpm. It is shown that the strain was introduced more intensely in the mid part on the cross section. This strained region extended with increasing number of revolution and covered throughout the cross section in the 2 mm thickness ring after 30 revolutions. The intense-strained region extended to ~3 mm in the 4 mm thickness ring after 30 revolutions but remains almost the same even after 100 revolutions. The thickness of ~3 mm may be an upper limit to achieve homogeneous introduction of the strained region throughout the cross section.