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Author: xiaoyu zheng
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21. NIST Microform Calibration System for Rockwell Hardness Standardization
Jun-Feng Song, Samuel Rea Low III, Xiaoyu A Zheng
In the uncertainty budget of Rockwell hardness tests, microform geometric errors of the diamond indenter are a major contributor. The microform calibration of Rockwell diamond indenters has been one of the key steps for Rockwell hardness standardiza ...
22. Topography Measurements for Determining the Decay Factors in Surface Replication
Jun-Feng Song, P Rubert, Xiaoyu A Zheng, Theodore Vincent Vorburger
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 q ...
23. Surface Topography Analysis for a Feasibility Assessment of a National Ballistics Imaging Database
NIST Interagency/Internal Report (NISTIR)
Theodore Vincent Vorburger, James H Yen, B Bachrach, Thomas B Renegar, Li Ma, Hyug-Gyo Rhee, Xiaoyu A Zheng, Jun-Feng Song, Charles Dewey Foreman
This document reports on a study to determine the feasibility and utility of a national ballistics
database of casing and bullet images. The purpose of such a proposed database would be to
provide a reference collection of ballistic images against ...
24. Comparison of Optical and Stylus Methods for Measurement of Rough Surfaces
Theodore Vincent Vorburger, H G Rhee, Thomas B Renegar, Jun-Feng Song, Xiaoyu A Zheng
Abstract Optical methods are increasingly used for measurement of surface texture, particularly for areal measurements where the optical methods are generally faster. A new Working Group under Technical Committee (TC) 213 in the International Organiz ...
25. Correlation of Topography Measurements of NIST SRM 2460 Standard Bullets by Four Techniques
Jun-Feng Song, Theodore Vincent Vorburger, Thomas B Renegar, Xiaoyu A Zheng, Hyug-Gyo Rhee, John M Libert, Li Ma, K Bogart, Susan M Ballou, B Bachrach
Three optical instruments including an interferometric microscope, a Nipkow disk confocal microscope and a laser scanning confocal microscope are used for the measurements of bullet profile signatures of a National Institute of Standards and Technolo ...