Formation of a submicrocrystalline structure in a two-phase titanium alloy without severe plastic deformation

The formation of submicrocrystalline (SMC) Ti–6Al–4V was achieved by imposing a much lower strain (ε=1.4) compared to that typically imposed during severe plastic deformation operations (i.e. 4⩽ε⩽8). Electron backscatter diffraction analysis revealed that the novel process was effective in promoting...

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Bibliographic Details
Published in:Scripta materialia 2013-06, Vol.68 (12), p.996-999
Main Authors: Park, Chan Hee, Kim, Jeoung Han, Yeom, Jong-Taek, Oh, Chang-Seok, Semiatin, S.L., Lee, Chong Soo
Format: Article
Language:English
Subjects:
Martensite
Recrystallization
Thermomechanical processing
Titanium
Ultrafine grain
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Summary:The formation of submicrocrystalline (SMC) Ti–6Al–4V was achieved by imposing a much lower strain (ε=1.4) compared to that typically imposed during severe plastic deformation operations (i.e. 4⩽ε⩽8). Electron backscatter diffraction analysis revealed that the novel process was effective in promoting dynamic recrystallization and limiting α grain growth. The SMC sheet had much higher yield strength than usual (1134MPa) and reasonable elongation (∼12%) at room temperature, and exhibited enhanced ductility at elevated temperatures.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2013.02.055