[PDF] Test Temperature Range For Nist Certified Charpy Specimens For Testing At Room Temperature eBook

Author : Enrico Lucon
Publisher :
Page : 0 pages
File Size : 50,7 MB
Release : 2023
Category :
ISBN :

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The NIST Charpy Machine Verification Program is ready to introduce low-energy and high-energy certified specimens that can be tested at room temperature instead of -40 ℗ʻC, thus accommodating the requests of many customers during the past 35 years. An investigation aimed at providing a practical and technically sound definition of "room temperature" (barycentric value and tolerance) was conducted, by examining previously obtained Charpy energy transition curves for different energy levels, as well as by testing certified low-energy and high-energy specimens at 21 ℗ʻC (ambient temperature of the NIST Charpy Lab in Boulder, Colorado) and additional temperatures in the range 21 ℗ʻC ℗ł 5 ℗ʻC. Results have shown that for low-energy specimens, even within a relatively small 10 ℗ʻC range, the influence of test temperature on Charpy absorbed energy can be significant enough to cause "good" machines to fail the requirements of the ASTM E23 standard. Therefore, at this energy level, the allowable test temperature range must be restricted to 21 ℗ʻC ℗ł 1 ℗ʻC. For the other two energy levels (high and super-high), the influence of test temperature is small enough that the allowable temperature range can be expanded to 21 ℗ʻC ℗ł 3 ℗ʻC.

Author : W. R. Corwin
Publisher : ASTM International
Page : 630 pages
File Size : 24,98 MB
Release : 1998
Category : Light water reactors
ISBN : 0803124767

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As part of an increasing interest in radiation embrittlement for aging nuclear reactors, scientists gathered in New Orleans in January 1997 to consider the interests and capabilities of the scientific-testing community and of the commercial light-water-cooled power-reactor industry in terms of improving methods to characterize component integrity. The resulting 37 papers concentrate on the use of unique small and miniature specimens; nondestructive, nonintrusive, and in- situ test techniques for measuring mechanical and fracture properties; the application of tests to irradiation-induced embrittlement; and actual examples of tests to determine material integrity and to evaluate potential component life extension. They consider experimental, analytical, and computational aspects. Annotation copyrighted by Book News, Inc., Portland, OR

Author : Susmita Bose
Publisher : Elsevier Inc. Chapters
Page : 16 pages
File Size : 14,40 MB
Release : 2013-03-12
Category : Science
ISBN : 0128070951

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This brief introductory chapter provides a broad overview of materials, biomaterials and the need to understand different techniques to characterize biomaterials. From this chapter, the reader can gain a perspective on how the rest of the topics in different chapters are divided to fully comprehend this inherently multidisciplinary field. Application of appropriate characterization tools can not only save time to fully evaluate different biomaterials, it can also make commercial biomedical devices safer. In the long run, safer biomedical devices can only reduce the pain and suffering of mankind, a dream that resonates with every biomedical researcher.

Author : B.J. Hunt
Publisher : Springer Science & Business Media
Page : 376 pages
File Size : 12,79 MB
Release : 2012-12-06
Category : Science
ISBN : 9401121605

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Polymers continue to play an ever increasing role in the modern world. In fact it is quite inconceivable to most people that we could ever have existed of the increased volume and variety of materials without them. As a result currently available, and the diversity of their application, characterisation has become an essential requirement of industrial and academic laboratories in volved with polymeric materials. On the one hand requirements may come from polymer specialists involved in the design and synthesis of new materials who require a detailed understanding of the relationship between the precise molecular architecture and the properties of the polymer in order to improve its capabilities and range of applications. On the other hand, many analysts who are not polymer specialists are faced with the problems of analysing and testing a wide range of polymeric materials for quality control or material specification purposes. We hope this book will be a useful reference for all scientists and techno or industrial laboratories, logists involved with polymers, whether in academic and irrespective of their scientific discipline. We have attempted to include in one volume all of the most important techniques. Obviously it is not possible to do this in any great depth but we have encouraged the use of specific examples to illustrate the range of possibilities. In addition numerous references are given to more detailed texts on specific subjects, to direct the reader where appropriate. The book is divided into II chapters.