THE EFFECT OF SURFACE PREPARATION AND CONDITION ON MICROHARDNESS

摘要

Observations on the load dependence of the pyramid microhardness are discussed and various explanations of it are briefly reviewed. Experimental results are presented which indicate the effect of the polishing procedure on the hardness-load relationship. A simplified mathematical analysis is presented which shows the relationship between the hardness-load behavior and the stress-strain curve under uniaxial deformation. The various hardness-load trends are explained in terms of strain hardening, effect of the free surface, and cold working introduced by the polishing procedure.