Dynamic hardness testing challenges conventional tests

The design and use of a portable dynamic hardness tester is described. The thesis begins with a description of the more common static hardness tests and the usefulness of such tests in industry. It shows a correlation between the different types of hardness and also between hardness and other material parameters such as tensile strength. A thorough investigation of the principles involved in the indentation processes using conical and spherical indenters under static and dynamic loading is given so that the reasons for the correlations may be more clearly understood. A series of test specimens tested by conventional static hardness tests (Brinell, Vickers and Rockwell) are used as calibration specimens for the dynamic tester. Both a spherical and conical tip are used. The results of these tests are compared and analyzed. The dynamic tester may then be programmed so that it correlates with the results of the static tests. A set of guidelines for the use of such a portable tester is then given.

Grantor dc:publisher.institution

Department of Mechanical Engineering

Year dc:date.issued

1993

Author dc:creator

• Kohlhöfer, Walter

Advisor dc:contributor.advisor

• Penny, R K

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/11427/15981

OAI identifier oai:identifier

oai:open.uct.ac.za:11427/15981