Review Questions: 1. What is the theory on which Rockwell hardness testing is based? 2. What...

Transcribed Image Text:

Review Questions: 1. What is the theory on which Rockwell hardness testing is based? 2. What is the purpose of the minor load in Rockwell hardness testing? 3. What are the advantages of the Rockwell hardness testing method? 4. What are the disadvantages of the Rockwell method? 5. How thick must the specimen be in order to get an accurate Rockwell hardness reading? 6. Based on what parameters is any hardness scale defined? 7. How is an appropriate hardness scale chosen for a given material? 8. Does hardness have derived units? A 9. In what situations is hardness measurement more convenient than a tensile test? 10. Why can hardness be related to yield strength of a material? How? 11. How do hardness readings from different scales be related to each other? 12. Why should all the hardness tests be performed far away from specimen edges, other tests, and large scratches? 13. How close can a Rockwell hardness indentation be to another without getting an error in the reading? Review Questions: 1. What is the theory on which Rockwell hardness testing is based? 2. What is the purpose of the minor load in Rockwell hardness testing? 3. What are the advantages of the Rockwell hardness testing method? 4. What are the disadvantages of the Rockwell method? 5. How thick must the specimen be in order to get an accurate Rockwell hardness reading? 6. Based on what parameters is any hardness scale defined? 7. How is an appropriate hardness scale chosen for a given material? 8. Does hardness have derived units? A 9. In what situations is hardness measurement more convenient than a tensile test? 10. Why can hardness be related to yield strength of a material? How? 11. How do hardness readings from different scales be related to each other? 12. Why should all the hardness tests be performed far away from specimen edges, other tests, and large scratches? 13. How close can a Rockwell hardness indentation be to another without getting an error in the reading?

Answer rating: 100% (QA)

1 The theory on which Rockwell hardness testing is based is that a small indenter is pressed into the surface of a material with a specific force and ... View the full answer