After the tensile testing was completed, the group machined 27 fatigue test specimen according to Sonntag Fatigue testing specifications, shown in Figure 3. These fatigue test specimen were then tested using the Sonntag Fatigue tester. The 25 specimens were tested according to the plan below. The final specimen were then tested the same way, with the addition of a strain gauge. The Fatigue Test plan is as follows:
