Production method of indentation curve and hardness test method
US7565831B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 2006 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Jan 22, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0218
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A production method of an indentation curve is given, in which when an indentation curve showing a relationship between indentation force and indentation depth in a process of indenting an indenter into a surface of a sample is produced, a measurement range using an (i−n)th (here, i and n are natural numbers) measurement value as a reference is provided, and the indentation depth or indentation force is temporarily measured when the indentation force or indentation depth is gradually changed, respectively, and when a temporarily measurement value obtained by the temporarily measurement is out of the determination range, indentation depth at the relevant indentation force or indentation force at the relevant indentation depth is measured and set as an ith measurement value, or the temporarily measurement value is used as the ith measurement value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.