| 摘要 |
A method for calculating an indenter area function and quantifying a deviation from the ideal shape of an indenter. The method preferably comprises the steps of: (1) providing a material testing apparatus, an indenter, and a sample; (2) performing one (or very few indentation tests) across a range of loads by applying the indenter to the sample; (3) collecting load data; (4) calculating Martens hardness data (5) normalizing the depth data and Martens hardness data; and (6) analyzing the load data to detect the amount of deviation in the indenter's area function. Preferably, when applying the indenter to the sample, the loading rate will be performed very slowly at low loads. The loading rate will then preferably accelerate as the load increases. This will generally allow the load application tester to produce repeatable data at low loads and a full range test in a reasonably short time. |
