What is the principle of Rockwell hardness test?

Related questions

1. What is a good blade hardness?
2. What is the difference between Rockwell hardness and Brinell hardness?
3. Is Damascus steel strong?
4. How do you calculate Brinell hardness?
5. What does Brinell hardness number mean?
6. What is Brinell hardness number?
7. What does HRC 1 mean?
8. What is BHN?
9. How is hardness measured?
10. What is the hardest steel for knives?

Tags

1. #specified
2. #dwell
3. #material
4. #hardness
5. #measure
6. #under
7. #specific
8. #rates
9. #levels
10. #rockwell
11. #indenter
12. #times
13. #applied
14. #occurs
15. #penetrated
16. #indentation
17. #force
18. #tests
19. #deformation