Location

Snowmass Village, CO

Start Date

1-1-1995 12:00 AM

Description

One of the critical elements related to the practicality of any NDE technique is its reproducibility under nominally the same inspection conditions. The results of certain test methodologies, however, are not always repeatable and understanding the origin of the irreproducibility is often as critical as obtaining reproducible results. One example is the characterization of residual stress in structural ferromagnets using the magnetoacoustic (MAC) method [1]. Although it has not been widely publicized, the test results of this method are known to be time-dependent. Two distinct types of time dependencies have been observed during testing. The first type has a clearly definable relaxation time, while no such trend has been observed for the second.

Volume

14B

Chapter

Chapter 8: NDE Systems, Reliability, and Transferability

Section

Reliability and Transferability

Pages

2413-2420

DOI

10.1007/978-1-4615-1987-4_308

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Issues on Reproducibility/Reliability of Magnetic NDE Methods

Snowmass Village, CO

One of the critical elements related to the practicality of any NDE technique is its reproducibility under nominally the same inspection conditions. The results of certain test methodologies, however, are not always repeatable and understanding the origin of the irreproducibility is often as critical as obtaining reproducible results. One example is the characterization of residual stress in structural ferromagnets using the magnetoacoustic (MAC) method [1]. Although it has not been widely publicized, the test results of this method are known to be time-dependent. Two distinct types of time dependencies have been observed during testing. The first type has a clearly definable relaxation time, while no such trend has been observed for the second.