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Investigation of the mechanical behaviour of Ti–6Al–4V alloy under hot forming conditions: Experiment and modelling
Author(s) -
Velay V.,
Matsumoto H.,
Sasaki L.,
Vidal V.
Publication year - 2014
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.201400293
Subject(s) - formability , superplasticity , materials science , forging , microstructure , metallurgy , alloy , titanium alloy , grain size , forming processes , strain rate , work (physics) , hot working , composite material , mechanical engineering , engineering
The present investigation aims at evaluating and understanding the formability of Ti–6Al–4V alloy under hot forming conditions (650 °C ≤ T ≤ 750 °C). To fulfil these objectives, it was necessary to establish accurate material models and predict microscopic material evolution depending on temperature and strain rate. Two kinds of microstructure were investigated, the first one considers a conventional grain size of the α‐phase (3 µm) whereas a combined forging‐rolling process is used to elaborate the second one and allows to obtain a very fine grain of the α‐phase (0.5 µm). In this research work, we propose to investigate the capabilities of the titanium alloy under forming conditions quite different from those usually considered in superplastic forming process (lower temperatures and higher strain rates).