Tensile Test

first in a series of macro shots. this is well, err broken rods from my tensile test hehe.. mech students should know this :)
1.broken S55C ( carbon steel) the cross surface area 2.screws
3.side view of a broken A2017(germanium) 4.2017
5.cross surfce area of the germanium(aluminium alloy)

the end.. whats the conclusion peeps between the two metal?