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Author: jolene splett

Displaying records 11 to 20 of 33 records.
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11. Charpy Machine Verification: Limits and Uncertainty
Series: Special Publication (NIST SP)
Published: 9/1/2008
Authors: Jolene D Splett, Christopher N McCowan, Chih-Ming Wang
Abstract: The purpose of this document is to clarify some issues pertaining to uncertainty statements and the ASTM E 23 limits used in the Charpy machine verification program. We explain some of the distributional subtleties associated with uncertainty and ult ...

12. A Liquid Density Standard Over Wide Ranges of Temperature and Pressure Based on Toluene
Series: Journal of Research (NIST JRES)
Published: 2/1/2008
Authors: Mark O McLinden, Jolene D Splett
Abstract: The density of liquid toluene has been measured over the temperature range -60 {degree}C to 200 {degree}C with pressures up to 36 MPa. A two-sinker hydrostatic-balance densimeter utilizing a magnetic suspension coupling provides an absolute determina ...

13. Dynamic Force Measurement: Instrumented Charpy Impact Testing
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6652
Published: 1/1/2008
Authors: Christopher N McCowan, Jolene D Splett, E. Lucon
Abstract: The maximum forces measured by the machines in this round robin are in good agreement. This general result shows that the static force calibration of instrumented strikers is quite robust, and that the various striker designs evaluated here performed ...

14. NIST Recommended Practice Guide: Computing Uncertainty for Charpy Impact Machine Test Results
Series: Special Publication (NIST SP)
Published: 9/1/2007
Authors: Jolene D Splett, Christopher N McCowan, Hariharan K Iyer, Chih-Ming Wang
Abstract: The purpose of this recommended practice guide is to demonstrate how to determine the uncertainty associated with mean absorbed energy of specimens tested on a Charpy impact machine. We assume that the Charpy machine has successfully met the requirem ...

15. An Empirical Model for the Warm-Up Drift of a Commercial Harmonic Phase Standard
Published: 6/1/2007
Authors: Jeffrey A Jargon, Jolene D Splett, Dominic F. (Dominic F.) Vecchia, Donald C. DeGroot
Abstract: We develop an empirical model for the warm-up drift in a harmonic phase standard used to calibrate the phase distortion of a nonlinear vector network analyzer. The model enables us to estimate the time at which the standard reaches stability.

16. Current Ripple Effect on n-Value
Published: 6/1/2007
Authors: Loren Frederick Goodrich, Jolene D Splett
Abstract: We studied the systematic effect of current ripple on the determination of n-value, which is the index of the shape of the electric field-current (E-I) curve. Commercial Nb^d3^Sn wires were measured with controlled amounts of ac ripple. Substitution- ...

17. Evaluation Specimens for Izod Impact Machines (SRM 2115): Report of Analysis
Series: Special Publication (NIST SP)
Report Number: 260-164
Published: 10/1/2006
Authors: Thomas Allen Siewert, Jolene D Splett, Raymond L Santoyo
Abstract: In the past few years, we have received a number of requests for verification specimens for Izod impact machines, similar to what we offer for Charpy impact machines. Although there are similarities between Izod and Charpy impact testing, there are s ...

18. International Comparison of Impact Reference Materials (2004)
Published: 4/3/2006
Authors: Christopher N McCowan, G. Roebben, Y. Yamaguchi, S. Lefrancois, Jolene D Splett, S. Takagi, A. Lamberty
Abstract: A three-year horizontal comparison has been completed between national laboratories that certify specimens for the indirect verification of Charpy impact test machines. The participants in this study were the Institute for Reference Materials and Mea ...

19. Analysis of Charpy impact verification data: 1993-2003
Published: 3/1/2006
Authors: Jolene D Splett, Christopher N McCowan
Abstract: Indirect verification tests, used to verify the performance of Charpy impact machines according to ASTM Standard E23, are evaluated by the National Institute of Standards and Technology (NIST) and the data from these tests are co1lected in a database ...

20. Unexpected Effect of Field Angle in Magnetoresistance Measurements of High-Purity Nb
Published: 6/1/2005
Authors: Loren Frederick Goodrich, Theodore C Stauffer, Jolene D Splett, Dominic F. (Dominic F.) Vecchia
Abstract: We report on unexpected field-angle dependence of the magnetoresistance measurements of commercial, high-purity Nb discovered during our study of residual resistivity ratio (RRR{/I}) measurements. The (RRR{/I}) value indicates the purity and th ...

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