The Production of Calibration Specimens for Impact Testing of Subsize Charpy Specimens PDF Download
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Author: DJ. Alexander
Publisher:
ISBN:
Category : Calibration
Languages : en
Pages : 7
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Book Description
Calibration specimens have been manufactured for checking the performance of a pendulum impact testing machine that has been configured for testing subsize specimens, both half-size (5.0 x 5.0 x 25.4 mm) and third-size (3.33 x 3.33 x 25.4 mm). Specimens were fabricated from quenched-and-tempered 4340 steel heat treated to produce different microstructures that would result in either high or low absorbed energy levels on testing. A large group of both half- and third-size specimens were tested at -40°C. The results of the tests were analyzed for average value and standard deviation, and these values were used to establish calibration limits for the Charpy impact machine when testing subsize specimens. These average values plus or minus two standard deviations were set as the acceptable limits for the average of five tests for calibration of the impact testing machine.
Author: DJ. Alexander
Publisher:
ISBN:
Category : Calibration
Languages : en
Pages : 7
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Book Description
Calibration specimens have been manufactured for checking the performance of a pendulum impact testing machine that has been configured for testing subsize specimens, both half-size (5.0 x 5.0 x 25.4 mm) and third-size (3.33 x 3.33 x 25.4 mm). Specimens were fabricated from quenched-and-tempered 4340 steel heat treated to produce different microstructures that would result in either high or low absorbed energy levels on testing. A large group of both half- and third-size specimens were tested at -40°C. The results of the tests were analyzed for average value and standard deviation, and these values were used to establish calibration limits for the Charpy impact machine when testing subsize specimens. These average values plus or minus two standard deviations were set as the acceptable limits for the average of five tests for calibration of the impact testing machine.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Book Description
Calibration specimens have been manufactured for checking the performance of a pendulum impact testing machine that has been configured for testing subsize specimens, both half-size (5.0 x 5.0 x 25.4 mm) and third-size (3.33 x 3.33 x 25.4 mm). Specimens were fabricated from quenched-and-tempered 4340 steel heat treated to produce different microstructures that would result in either high or low absorbed energy levels on testing. A large group of both half- and third-size specimens were tested at -40°C. The results of the tests were analyzed for average value and standard deviation, and these values were used to establish calibration limits for the Charpy impact machine when testing subsize specimens. These average values plus or minus two standard deviations were set as the acceptable limits for the average of five tests for calibration of the impact testing machine.
Author: John M. Holt
Publisher: ASTM International
ISBN: 0803112955
Category : Compliance
Languages : en
Pages : 219
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Book Description
Author: T. A. Siewert
Publisher: ASTM International
ISBN: 0803120184
Category : Equipment and supplies
Languages : en
Pages : 302
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 692
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Author: JF. Kalthoff
Publisher:
ISBN:
Category : Dynamic material behaviour
Languages : en
Pages : 12
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Book Description
The instrumented impact test with Charpy specimens of subsize geometry is discussed in relation to equivalent standard procedures for performing the test with specimens of regular size. Subsize specimens because of their smaller dimensions imply smaller load values and higher frequencies of the force oscillations. These differences in the behaviour require special high sensitivity striker tups, force measuring chains of high upper frequency bounds, and knowledge of the actual Hooke's line for determining the yield force Fgy. Practical recommendations are given and procedures are outlined on how these requirements can be met and how the evaluations can be performed. The applicability of the presented measuring and evaluation procedures and the validity and the accuracy of the obtained data is demonstrated by experimental results.
Author: D.E. Driscoll
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 508
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Author: N. Hida
Publisher:
ISBN:
Category : Error
Languages : en
Pages : 11
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Book Description
In 1990, Japan established the industrial standard "Standard Specimens for Charpy Impact Testing Machines" and revised "Charpy Impact Testing Machines". Before establishing these standards, the Iron and Steel Institute of Japan had studied the standardization of the reference test pieces and the reference testing machines. Reference test pieces for two energy levels (30 J and 100 J) are available, with a coefficient of variation within a lot of less than 4%.
Author: T. A. Siewert
Publisher: ASTM International
ISBN: 0803128649
Category : Dynamic testing
Languages : en
Pages : 402
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Book Description
