The electro-forming technique is used at National Institute of Standards and Technology (NIST) for the production of standard reference material (SRM) 2461 standard casings to support nationwide ballistics measurement traceability and measurement quality control in the US. In order to ensure that the SRM casings are produced with virtually the same surface topography, it is necessary to test the decay factors of the replication process. Twenty-six replica casings are replicated from the same master casing for the decay factor tests. The NIST topography measurement system is used for measurements and correlations of surface topography. The topography decays are quantified by the cross-correlation function maximum CCFmax. Based on the test, it is expected that 256 SRM casings can be replicated from the same master with CCFmax values higher than 95%.
Citation: Measurement Science & Technology
Pub Type: Journals
surface metrology, topography measurement, decay factor, electro-forming, standard casing