Procedures for the Calibration of ASTM E127-type Ultrasonic Reference Blocks PDF Download
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Author: D. J. Chwirut
Publisher:
ISBN:
Category : Ultrasonic transducers
Languages : en
Pages : 48
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Book Description
Author: D. J. Chwirut
Publisher:
ISBN:
Category : Ultrasonic transducers
Languages : en
Pages : 48
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Book Description
Author: D. J. Chwirut
Publisher: Forgotten Books
ISBN: 9780364958773
Category : Business & Economics
Languages : en
Pages : 50
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Book Description
Excerpt from Procedures for the Calibration of Astm E127-Type Ultrasonic Reference Blocks This inerease in allowable variability-is not because +zdb is acceptable, but because it approximates the state - of-the-art of field blocks today. This amount of variabilityiresults in unfair competition between suppliers, disagreements at the supplier-user interface, and overdesigned systems and unnecessary system shutdowns or overhauls because of the large measurement uncertainty. This situation is clearly unacceptable. Efforts to remedy this situation are underway in several laboratories. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: D. J. Chwirut
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: D. J. Chwirut
Publisher:
ISBN:
Category : Ultrasonic transducers
Languages : en
Pages : 48
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Book Description
Author: D. G. Eitzen
Publisher:
ISBN:
Category :
Languages : en
Pages : 86
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Book Description
A program to improve the quality, reproducibility and reliability of nondestructive testing through the development of improved ASTM-type ultrasonic reference standards is described. Reference blocks of aluminum, steel, and titanium alloys are to be considered. Equipment representing the state-of-the-art in laboratory and field ultrasonic equipment was obtained and evaluated. RF and spectral data on ten sets of ultrasonic reference blocks have been taken as part of a task to quantify the variability in response from nominally identical blocks. Techniques for residual stress, preferred orientation, and micro-structural measurements were refined and are applied to a reference block rejected by the manufacturer during fabrication in order to evaluate the effect of metallurgical condition on block response. New fabrication techniques for reference blocks are discussed and ASTM activities are summarized.
Author:
Publisher:
ISBN:
Category : Physical instruments
Languages : en
Pages : 48
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 700
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Calibration
Languages : en
Pages : 118
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Book Description
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category :
Languages : en
Pages : 742
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Book Description
Author: Daniel J. Chwirut
Publisher:
ISBN:
Category :
Languages : en
Pages : 57
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Book Description
Recent activities aimed toward improving the ASTM-type ultrasonic reference block system are described. On the aluminum block system (ASTM E127 and NBS TN 924), efforts were focused on better definition of the measurement equipment (transducer and instrument), the implementation of a Measurement Assurance Program and Loaner Block Service, and modeling of the distance-amplitude relationship. It is shown that a large increase in the precision of reference block readings is easily achievable by implementing simple changes and controls in the measurement procedure. On steel and titanium blocks (e.g. ASTM E-428), efforts were directed toward quantifying the extent of reproducibility possible among blocks fabricated by both conventional drilling and by diffusion bonding. Reasonable reproducibility is achievable by both, with the diffusion-bonding process offering both advantages and disadvantages. (Author).
