Download or read book Comparison of Metrological Techniques for Charpy Impact Machine Verification written by AK. Schmieder and published by . This book was released on 1990 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Different measuring techniques were used to determine some of the specified characteristics of nine Charpy impact machines. In general, the techniques used were specified or recommended by one or more national standards. For example, the elevation of a raised pendulum was determined by direct measurement with a ruler and also by calculation from the measured angle of the pendulum rod. Both methods gave equal values with about the same reproducibility. On the other hand, significant differences were found when the friction loss in the pendulum was measured by a single swing and by multiple, successive swings. Significant differences in the period of oscillation were also found when the maximum angle of swing was 15 degrees as compared with 5 degrees. Both values were specified as permitted maximums in some national standards.
Download or read book Charpy Impact Test written by John M. Holt and published by ASTM International. This book was released on 1990 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pendulum Impact Machines written by T. A. Siewert and published by ASTM International. This book was released on 2006 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Radiation on Materials written by D. S. Gelles and published by ASTM International. This book was released on 1996 with total page 1169 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Comparison of Impact Reference Materials 2004 written by C. McCowan and published by . This book was released on 2006 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 Measurements of the European Commission, the National Metrology Institute of Japan (NMIJ), the National Institute of Standards and Technology in the United States, and the Laboratoire National d'Essais in France. The comparison was conducted to evaluate the impact of reference specimens over a three-year period. Sets of certified reference specimens, at low (15 J), medium (30 J), and high energy (100 J) levels were produced and distributed at the start of the study. Specimens were tested approximately every six months on each of the machines in the study. The results of the testing are presented and the stability of the various impact machines and specimens are discussed.
Download or read book International Comparison of Impact Verification Programs written by G. Revise and published by . This book was released on 2000 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: A horizontal comparison is made between the four laboratories that certify Charpy impact verification specimens. The participants in this study were Japan (NRLM), France (LNE), the European Commission (IRMM), and the United States (NIST). The exercise was conducted to show how the impact verification programs, specimens, and test procedures compare with each other. Results for both 8 and 2 mm strikers were compared. The study showed the following: (1) The certified energies of impact verification specimens distributed by these four metrological authorities often agreed within 1% of the average values determined in this study; (2) the variation in energy for the specimens was low, typically bracketed by a coefficient of variation of between 0.02 and 0.04; and (3) the energies measured for the tests performed with 2 and 8 mm strikers on the 4340 steel specimens were nearly equivalent, but a trend of slightly higher energy for the 2 mm tests is indicated.
Download or read book Effects of Radiation on Materials written by and published by . This book was released on 1996 with total page 1192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Materials Metrology and Standards for Structural Performance written by B.F. Dyson and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a contributed reference work from international authors from both industry and academia. It deals with materials metrology and standards for engineering design. This includes examination of metrological considerations as well as investigating the many measurement and control techniques. It will be of interest to all materials scientists and engineers from graduates to experienced professionals and will be particularly useful to all those involved with measurement instrumentation.
Download or read book Springer Handbook of Metrology and Testing written by Horst Czichos and published by Springer Science & Business Media. This book was released on 2011-07-22 with total page 1244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Springer Handbook of Metrology and Testing presents the principles of Metrology – the science of measurement – and the methods and techniques of Testing – determining the characteristics of a given product – as they apply to chemical and microstructural analysis, and to the measurement and testing of materials properties and performance, including modelling and simulation. The principal motivation for this Handbook stems from the increasing demands of technology for measurement results that can be used globally. Measurements within a local laboratory or manufacturing facility must be able to be reproduced accurately anywhere in the world. The book integrates knowledge from basic sciences and engineering disciplines, compiled by experts from internationally known metrology and testing institutions, and academe, as well as from industry, and conformity-assessment and accreditation bodies. The Commission of the European Union has expressed this as there is no science without measurements, no quality without testing, and no global markets without standards.
Download or read book Journal of Research of the National Institute of Standards and Technology written by and published by . This book was released on 1998 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AIST bulletin of metrology written by and published by . This book was released on 2004 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1994 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recommended Practice written by D. P. Vigliotti and published by . This book was released on 2000 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantitative Comparison and Evaluation of Various Notch Machining Methods and How They Affect ASTM E23 and ISO R442 Testing Equipment Results written by DA. Fink and published by . This book was released on 1990 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The differences obtained when conducting Charpy impact tests using an ASTM method E23 specification, versus the ISO type impact tester have been reported with little agreement upon the comparisons. There has also been historically much controversy as far as the proper method of machining the notch into the Charpy specimen. This paper compares the effects of the two different types of impact testing equipment and evaluates machining of the notch by the methods of grinding, broaching and milling with a single toothed fly cutter.
Download or read book Analysis of Charpy Impact Verification Data written by JD. Splett and published by . This book was released on 2006 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indirect verification tests used to verify the performance of Charpy impact machines according to ASTM Standard E23 were evaluated by the National Institute of Standards and Technology (NIST), and the data from these tests are collected in a database. The data include the capacity and the pendulum design of the impact machine, the energy obtained for each specimen tested, the reference energy for the specimen lot tested, and the test date. The principal use of this data is to track the performance of individual impact machines. However, the data also provide an opportunity to evaluate existing and proposed requirements for the indirect verification of Charpy impact machines. The results of more than 16 000 verification tests are used to compare the current verification requirements of ASTM Standard E23 with those of ISO Standard 148-2. Discussions focus on the identification of reasonable, practical, and meaningful verification requirements that might be proposed for use in both documents.
Download or read book Pendulum Impact Testing written by T. A. Siewert and published by ASTM International. This book was released on 2000 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
