Coarse Second Phase Particle Size Distribution of UFG Al Alloys Processed by Severe Plastic Deformation: Effect on Cavitation during Superplastic Deformation

Kyung Tae Park; Eui Gil Lee; Won Jong  Nam; Yong Shin Lee

doi:10.4028/www.scientific.net/MSF.539-543.2859

Paper Titles

Grain Size Saturation during Severe Plastic Deformation
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Nanostructuring a Zr-Hf Alloy via Large Strain Rolling
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Microstructural Characteristics of Cu-Fe-P Alloys Severely Deformed by Accumulative Roll Bonding Process
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Application of Equal-Channel Angular Pressing to Aluminum and Copper Single Crystals
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Coarse Second Phase Particle Size Distribution of UFG Al Alloys Processed by Severe Plastic Deformation: Effect on Cavitation during Superplastic Deformation
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An Alternative Constitutive Equation for Superplasticity
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Controlling the Thickness Uniformity in Equal Channel Angular Rolling (ECAR)
p.2872

Nanostructured Titanium Based Materials
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Development and Properties of High Strengthened Carbon Steels Produced by Repetitive Side Extrusion and Heat Treatment Process
p.2884

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Coarse Second Phase Particle Size Distribution of UFG Al Alloys Processed by Severe Plastic Deformation: Effect on Cavitation during Superplastic Deformation

Abstract:

Two commercial Al alloys having different second phase particle distributions were subjected to severe plastic deformation (SPD) via equal channel angular pressing with or without subsequent cold rolling, and the effect of such SPD on the particle size distribution of the alloys was investigated. The particles larger than ∼ 3 μm were fragmented into several smaller ones by SPD. Contrarily, those smaller than ∼ 3 μm were hardly broken up by SPD but their distribution became more uniform. Along with these findings and the theoretical models for cavity nucleation at second phase particles, the cavitation behavior of ultrafine grained Al alloys during low temperature or high strain rate superplastic deformation was discussed.