Recent improvements to the ASTM-type ultrasonic reference block system [report]

Daniel J Chwirut
1979 unpublished
SUPPLEMENTARY NOTES KEY WORDS (Continue on reverse side If necessary and Identify by block number) calibration; diffusion bonding; Measurement Assurance Program; reference blocks; standards; ultrasonics; variability ABSTRACT (Continue on reverse side If necessary and Identify by block number) 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
more » ... the measurement equipment (transducer and instrument), the implementation of a Measurement Assurance Program and Leaner 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 DD FORM
doi:10.6028/nbs.ir.79-1742 fatcat:5p5qsu4l6bfjhim76dqttmhi2a