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- W586944769 abstract "High pressure torsion (HPT) is an effective method to enhance mechanical properties of metallic materials by refining the grain structure and strain-hardening. The main aim of this work is to investigate the structural modifications in a HPT processed commercial Al-Cu-Mg alloy during linear heating after HPT. The structural changes were analyzed using X-ray diffraction (XRD) and differential scanning calorimetry (DSC). After HPT, peak temperature for formation of S phase decreases from 260°C to 240°C. It indicates that dislocations introduced by severe plastic deformation provide more nucleation sites for precipitates. The crystallite size of the sample after HPT at room temperature is 66nm and the dislocation density is 3.3×10^14 m^-2. On heating from 210 to 240°C the dislocation density decreases dramatically from 2×10^14 m^-2 to 6.8×10^14 m^-2 and crystallite size increases from 54 to 142 nm. The evolution of strength measured by microhardness is discussed within the context of grain-size hardening and dislocation hardening." @default.
- W586944769 created "2016-06-24" @default.
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- W586944769 date "2013-03-01" @default.
- W586944769 modified "2023-09-27" @default.
- W586944769 title "Structural modifications during linear heating of a bulk ultrafine-grained Al-Cu-Mg alloy produced by high-pressure torsion" @default.
- W586944769 hasPublicationYear "2013" @default.
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