Compressive Electrically Assisted Forming Model - Electrically Assisted Forming - page 108

Fig. 5.23 Ti-G2 example
mechanical power profiles
[ 11 ]. Depicted are example
mechanical power profiles for
EAF tests on Ti-G2

Fig. 5.24 Stainless Steel 304
example mechanical power
profiles [ 11 ]. Depicted are
example mechanical power
profiles for EAF tests on
SS304

12

CD15

10

CD10

8

Baseline

6

CD25

4

CD20

2

0

0 5 10 15 20

Time (s)

reached [ 14 , 18 ]. The thermal softening could take place at a faster rate for the
titanium due to the temperatures reached during the EAF tests coupled with the
sensitivities of this metal's strength with temperature. The amount by which each
metal was alloyed could also have an effect on the EEC profile. The SS304 had up
to 20 % chromium alloyed into the base iron metal. The chromium was weaker
than the iron base metal, and this allows for high ductility of the stainless steels.
Also, the titanium was more than twice as resistive as the stainless steel, which
contributed to the faster heating profile and higher EAF temperatures.

5.6 EAF Modeling—Sensitivities and Simplifications
Conclusions

This section analyzes the effects of specific heat values and various heat transfer
modes on the effectiveness of EAF [ 13 ]. Additionally, observations are provided
for the different EEC profiles for certain materials. Also, a frequency analysis was