Mechanisms of Microstructure Refinement in Titanium during “abc” Deformation at 400°C

Sergey V. Zherebtsov; Egor A. Kudryavtsev; Gennady A. Salishchev

doi:10.4028/www.scientific.net/MSF.667-669.439

Paper Titles

Microstructural Evolution of Ultrafine-Grained Steel during Tandem Rolling Process
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Microstructures and Tensile Properties of Maraging Steel Processed by Equal-Channel Angular Pressing
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Stabilization of Lattice Defects in HPT-Deformed Palladium Hydride
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Microstructure and Properties of Nanostructured Zirconium Processed by High Pressure Torsion
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Mechanisms of Microstructure Refinement in Titanium during “abc” Deformation at 400°C
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Texture Manipulation in Commercial Purity Aluminum by Deformation Path Change from ECAP to Plane Strain Compression
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TEM and DSC Investigation of the Recovery of a Recycled Aluminum Processed by Equal Channel Angular Extrusion
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Microstructure and Mechanical Performance of AZ31-1.7 Wt.% Si Alloy Processed by Cyclic Channel Die Compression
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Enhancing the Efficiency of ECAP Processing in Particle Redistribution by Combination of Different Processing Routes
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Mechanisms of Microstructure Refinement in Titanium during “abc” Deformation at 400°C

Abstract:

Mechanical behavior and microstructure evolution of commercial pure titanium during successive compressions of samples along three orthogonal directions (or so-called “abc” deformation) at 400°C and strain rate 10-3s-1 were studied. The cumulative S- curve demonstrates a steady state flow stage following the intensive strengthening. The microstructure evolution of titanium during first increments of “abc” deformation is associated with twinning and shear deformation. Further deformation results in microstructure refinement due to transformation of coincidence site lattice twin boundaries to high-angle arbitrary ones and formation of high-angle deformation induced boundaries. Another mechanism of new grains formation is continuous dynamic recrystallization.