Control of Electrically Assisted Forming - Electrically Assisted Forming - page 171

Fig. 7.18 Flow curves for Grade 5 titanium: comparing non-constant current density (NCCD)
versus constant current density (CCD). Again, the CCD case decreases stress compared with the
NCCD case [ 3 ]
Fig. 7.19 Theoretical
and experimental data of
electrical current output for
constant current density
forming
Last, the measured current during the process was compared to the theoreti-
cal current to maintain a CCD during forming, and this is shown graphically in
Fig. 7.19 .
7.3.1 Benefits of Constant Current Density Forming
In summary, this work introduced the first CCD tests to examine the actual mate-
rial flow stress while subject to an EAF process. As a result of CCD testing, the
shape change of the specimen during the process did not influence the effect that