Microstructure and Texture of Zirconium and Titanium Grain Refined by Equal Channel Angular Pressing

Seng Ho Yu; Dong Hyuk Shin; Sun Keun Hwang

doi:10.4028/www.scientific.net/MSF.539-543.86

Paper Titles

Carbon, Nitrogen and Hydrogen in Steel: Similarities and Differences in their Effect on Structure and Properties
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Developments of Fuel Cell and Hydrogen Technology at NRC's Institute for Fuel Cell Innovation
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Microstructural Evolution in the Processing of Bulk Samples Using High-Pressure Torsion
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Microstructure and Texture of Zirconium and Titanium Grain Refined by Equal Channel Angular Pressing
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Syntheses and Applications of Fe-, Co-, Ni- and Cu-Based Bulk Glassy Alloys
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The Strain Dependence of Post-Deformation Softening during the Hot Compression of 304H Stainless Steel
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Development of a Magnesium Recycling Alloy Based on AM50
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Current Research Activities on High Nitrogen Steel in Japan
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Microstructure and Texture of Zirconium and Titanium Grain Refined by Equal Channel Angular Pressing

Abstract:

Zr702 and commercial purity Ti were grain refined through severe plastic deformation and their microstructure and texture characteristics were studied by optical microscopy, transmission electron microscopy, X-ray diffraction and electron back-scattered diffraction. The equal channel angular pressing was conducted at 350°C using a 90°/20° die. Up to 8 passes of pressing were performed via three different routes, A, C and BC, which resulted in reduction of the grain size down to 0.2-0.5.m. The two materials showed similar evolution characteristics of microstructure and texture. While the specimens pressed via route A showed lamellar grain shapes those via route C or BC exhibited equiaxed grains. A split basal texture was developed in the microstructure obtained by the route A pressing, which was similar to the cold rolling texture, whereas an asymmetric texture was produced in the specimens pressed via route BC. In the case of route C pressing, the texture characteristics were closer to those of the route BC case.