1. Take Gauge length of the sample

• Drag the vernier caliper.
• Right click on vernier caliper and click on pin.
• Place the sample on the vernier caliper.
• Take the gauge length and enter it below: Length: [input] mm

2. Take the diameter of the sample

• Right click on vernier caliper and click on unload sample.
• Now, Right click on sample and click on rotate.
• Place the sample on the vernier caliper.
• Take the diameter and enter it below: Diameter: [input] mm

3. Place sample on UTM machine.

• Right click on sample to rotate.
• Now, right click on the machine to pin.
• Now,place the sample on the machine.
• You can adjust zoom level also (Via Mouse Wheel).

4. Start the test. Click below buttons to start the machine

• Test1 for 500 MPa load
• Test2 for 549 MPa load
• Test3 for 602 MPa load [Furnace Temp: [value] ℃]

Test 1 Time in hrs | Elongation Reading (ΔL)

Test 2 Time in hrs | Elongation Reading (ΔL)

Test 3 Time in hrs | Elongation Reading (ΔL)

5. Results Creep curves at different stresses and corresponding values obtained from creep curves.

• Region I is primary creep regime, Region II is secondary creep regime (creep rate is minimum and stable) and Region III is tertiary Creep regime
• The creep rate is increasing with increasing stress and is as represented σ3 > σ2 > σ1
• In Curve 1 (500 MPa) and 2 (549 MPa) we can clearly demarcate the primary and secondary creep. In case of 3 (602 MPa) curve the deformation is rapid and primary creep is very limited.

Applied stress (MPa) | Load 1 | Load 2 | Load 3
Minimum Creep rate (s-1) | 1.405x10-8 | 3.28x10-8 | 2.95x10-7
Instantaneous strain | 0.00764 | 0.00811 | 0.0152
Time to fracture in hrs | 128.95 | 104.03 | 16.138
Fracture elongation (%) | 2.65 | 2.89 | 3.17