Influence of Number of Passes in ECAP on Superplastic Behavior in a Magnesium Alloy

Roberto B. Figueiredo; Terence G. Langdon

doi:10.4028/www.scientific.net/MSF.584-586.170

Paper Titles

The Influence of ECAP Die Channel Geometry on Shear Strain and Deformation Uniformity
p.145

Microstructure and Mechanical Properties of Nanostructured Intermetallic Alloy Based on Ti₂AlNb
p.153

The Features of Deformation Behavior of Ultra-Fine Grained Titanium and Aluminum Alloys under Conditions of High Strain Rate Superplasticity
p.159

High Strain Rate Superplasticity in a Zr and Sc Modified 7075 Aluminum Alloy Produced by ECAP
p.164

Influence of Number of Passes in ECAP on Superplastic Behavior in a Magnesium Alloy
p.170

The New Approach to Produce Al Sheets with UFG Structure Using SPD Processing
p.176

Grain Refinement and Deformation Behavior of Ultrafine Grained Pd and Pd-Ag Alloys Produced by HPT
p.182

Use of Ring Sample for High-Pressure Torsion and Microstructural Evolution with Equivalent Strain
p.191

Comparative Possibilities of Different X-Ray Methods by Study of SPD Metal Materials
p.197

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Influence of Number of Passes in ECAP on Superplastic Behavior in a Magnesium Alloy

Abstract:

Tensile tests were carried out at 473 K with initial strain rate of 10-4 s-1 in samples of a ZK60 alloy (Mg-5.5% Zn-0.5% Zr) processed by different number of passes using Equal-Channel Angular Pressing (ECAP). The measured superplastic elongations ranged from ~930% to a record of ~3050%. The flow behavior was found to vary with the number of passes of ECAP. It is shown that strain-hardening due to grain growth and the evolution of the strain rate sensitivity with the strain determines the flow behavior and final elongations. The results are consistent with theories of plastic flow in tensile testing.