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Paperback. Condizione: New. Print on Demand. This book calculates the uncertainty associated with Charpy impact machine test results. The Charpy impact test is commonly used to assess the toughness of materials, especially metals, and is a standard test method for metallic materials. The book follows the recommendations and procedures of the Guide to the Expression of Uncertainty in Measurement for computing uncertainty. It is written for users with some familiarity with the Charpy machine verification program. The author clarifies concepts of uncertainty, and provides procedures for computing uncertainty of test results. The book also discusses sources of uncertainty in Charpy impact tests and how to quantify them, including anvils and supports, material inhomogeneity, potential energy, friction loss, and scale accuracy. The book will be indispensable for researchers and technicians using Charpy impact machines, and for those involved in quality control and standards development. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.