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1. NIST Room Temperature Low-Energy and High Energy Verification Specimens: Feasibility Study
Series: NIST Interagency/Internal Report (NISTIR)
Published: 10/21/2015
Authors: Enrico Lucon, Christopher N McCowan, Raymond L Santoyo
Abstract: The feasibility of certifying Charpy reference specimens (SRMs) for testing at room temperature (RT, 21 °C ± 1 °C) instead of -40 °C was demonstrated at NIST by performing 130 RT tests from nine low-energy and high-energy lots on the three master mac ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918877

2. OVERVIEW OF NIST ACTIVITIES ON SUB-SIZE AND MINIATURIZED CHARPY SPECIMENS: CORRELATIONS WITH FULL-SIZE SPECIMENS AND VERIFICATION SPECIMENS FOR SMALL-SCALE PENDULUM MACHINES
Published: 7/19/2015
Authors: Enrico Lucon, Christopher N McCowan, Raymond L Santoyo
Abstract: NIST in Boulder Colorado investigated the correlations between impact test results obtained from standard, full-size Charpy specimens (CVN) and specimens with reduced thickness (sub-size Charpy specimens, SCVN) or reduced or scaled cross-section dime ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918008

3. Certified KLST Miniaturized Charpy Specimens for the Indirect Verification of Small-Scale Impact Machines
Published: 4/28/2015
Authors: Enrico Lucon, Christopher N McCowan, Raymond L Santoyo, Jolene D Splett
Abstract: Small specimen test techniques are becoming ever more popular as the need increases to characterize mechanical properties by use of the smallest possible amount of material, due to various restrictions on material availability, irradiation, testing s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915292

4. Establishment of an International Scale for Instrumented Charpy Testing: comparison between NIST and LNE
Series: Technical Note (NIST TN)
Report Number: 1875
Published: 4/1/2015
Authors: Enrico Lucon, Christopher N McCowan, Raymond L Santoyo, Stephane Lefrancois
Abstract: As a contribution to the establishment of an international scale for instrumented Charpy testing, aimed at ensuring that impact forces are obtained more accurately, NIST and Laboratoire National de métrologie et d‰Essais (LNE, France) have partic ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917575

5. Impact Characterization of 4340 and T200 Steels by Means of Standard, Sub Size and Miniaturized Charpy Specimens
Series: Technical Note (NIST TN)
Report Number: 1858
Published: 2/10/2015
Authors: Enrico Lucon, Christopher N McCowan, Raymond L Santoyo
Abstract: In this investigation, we performed instrumented Charpy tests in order to characterize the impact properties of three steels, used by NIST for the production of Charpy reference specimens (4340 quenched and tempered with two energy levels, and T2 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917313

6. Impact Characterization of Line Pipe Steels by Means of Standard, Sub-Size and Miniaturized Charpy Specimens
Series: Technical Note (NIST TN)
Report Number: 1865
Published: 2/10/2015
Authors: Enrico Lucon, Christopher N McCowan, Raymond L Santoyo
Abstract: Modern line pipe steels are characterized by a continuously increasing ratio between ductility and mechanical strength, which makes it difficult to interpret the results of conventional Charpy impact tests. For such tests, the extremely high abso ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917096

7. Evaluation of Bias for Two Charpy Impact Machines Using the Same Instrumented Striker
Published: 5/1/2011
Authors: Christopher N McCowan, Enrico Lucon, Raymond L Santoyo
Abstract: Two Charpy machines were used to test NIST verification specimens at three energy levels: low energy (≈ 15 J at -40°C), high energy (≈ 100 J at -40°C) and super-high energy (≈ 240 J at room temperature). The study evaluates the diff ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905891

8. Effect of CVN Striker Radius on Absorbed Energy and Lateral Expansion for Various Stainless Steels
Published: 11/1/2006
Authors: Thomas A. (Thomas A.) Siewert, Betsy Siewert, Raymond L Santoyo
Abstract: A number of wrought and cast stainless steel alloys were used to evaluate the effect of Charpy V-notch striker radius (2 mm vs 8 mm). Standard 10 mm by 10 mm (and 5 mm by 10 mm for N06022) specimens were machined from 5 grades of wrought material (30 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50378

9. 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 A. (Thomas A.) 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50301

10. Failure Analysis of the WWVB Tower
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6619
Published: 8/1/2002
Authors: Joseph David McColskey, Christopher N McCowan, Raymond L Santoyo
Abstract: A failure analysis was conducted on the collapse of the NIST WWVB tower. The analysis included mechanical testing, chemical analysis, and metallographic examination of the failed part. We ascertained that the underlying reason for the collapse was ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851247



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