Standard Practice for Ultrasonic Inspection of Aluminum-Alloy Wrought Products

Importancia y uso:

5.1 A number of factors such as the condition of the entry and back surfaces of the inspected part, the inclination of the ultrasonic beam with respect to the entry surface, and variations in the performance characteristics of the test system may cause significant differences in amplitudes of discontinuity indications and back reflections. These factors can seriously impair the reliability and the quantitative value of the ultrasonic test outlined in this practice.

5.2 Accurate evaluations of discontinuity size are also significantly affected by variations in search unit characteristics and by irregularities in discontinuity surfaces which can influence reflectivity. For these reasons, the discontinuity sizes that may be implied by the ultrasonic comparisons outlined in this practice must be regarded as “apparent” or “estimated” in recognition of the limited quantitative value of the measurement.

5.3 Because numerous interacting variables in a test system can adversely influence the results of an ultrasonic inspection, the actual quantitative effects of detected discontinuities upon the mechanical properties of the inspected product are difficult to establish. Although this practice provides a reliable control of product quality during manufacture, it is not applicable as an exclusive indicator of the ultimate quality and performance of components fabricated from the inspected products covered by this practice.

Subcomité:

E07.06

Referida por:

B0221M-21, E2375-22, B0881-17, B0221-21, B0209_B0209M-21A, B0247-20, B0241_B0241M-22, B0247M-20, B0211_B0211M-23

Volúmen:

03.03

Número ICS:

77.040.20 (Non-destructive testing of metals), 77.120.10 (Aluminium and aluminium alloys)

Palabras clave:

aerospace; aluminum-alloy wrought products; ultrasonic inspection ;