Premium
Enhanced superplastic deformation behavior of ultrafine‐grained Ti‐6Al‐4V alloy
Author(s) -
Saitova L.,
Semenova I.,
Höppel H.W.,
Valiev R.,
Göken M.
Publication year - 2008
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.200800308
Subject(s) - superplasticity , materials science , metallurgy , alloy , microstructure , pressing , severe plastic deformation , extrusion , deformation (meteorology) , grain size , titanium alloy , composite material
The mechanical behavior of the Ti‐6Al‐4V ELI alloy in both conventional grain size (CG) and ultrafine‐grained (UFG) conditions under tension and compression at elevated temperatures (500–800 °C) is considered. Grain refinement by equal‐channel angular pressing (ECAP) followed by multicycle extrusion was observed to result in a considerable improvement of superplastic characteristics of Ti‐6Al‐4V ELI alloy. The alloy exhibits a superplastic deformation behavior already at 600 °C. The enhanced regime of superplasticity allows more efficient forming of parts and components. In addition, the UFG microstructure and, consequently, enhanced mechanical properties are kept after superplastic forming.