Acoustic emission and inclusion fracture in 7075 aluminum alloys

Effect of Temperature and Heat Treatment on Crack Growth Acoustic Emission in 7075 Aluminum

“…The role of Mg 2 S1 1nclus1ons in the Variation of the factor X o with matrix yield stress at the ambient crack growth tempera ture. acoust1c em1ss1on source mechan1sm 1s 1nd1sputable, however, due to the remarkable agreement between shapes of the acoust1c em1ss1on ampl1tude d1str1but1on and the shape of the s1ze d1str1but1on of the Mg 2 S1 1nclus1ons (McBr1de, Maclachlan and Paradis, 1981). We propose that the acoust1c em1ss1on source 1s tr1ggered by the 1nclus1on fracture.…”

“…Investigations of 7075-T6 and -T651 aluminum undergoing tensile or cyclic loading have led several investigators to the conclusion that the fracture of brittle intermetallic inclusions is the source of burst acoustic emissions in these materials [2,3,4,5,6]. It has been shown by examination of fatigue crack fracture faces that inclusion fracture is observed when burst emissions occur.…”

A Comparison of AE Measurements from Aluminum Alloys and Glass/Epoxy Composites with Different AE Techniques

“…In particular, the AE generated during the deformation of 7075 aluminum alloys has been the subject of numerous investigations [5][6][7][8]. It has been clearly established that the AE generated is strongly dependent on the prior thermal and mechanical treatment of the test materials.…”

Acoustic Emission from Crack Growth in 7050 Aluminum and 7075 Aluminum as a Function of Temperature and Heat Treatment

“…Acoustic emission from 7075 aluminum during tensile deformation or cyclic loading has been the subject of investigations by many authors [1][2][3][4][5][6][7][8][9]. The acoustic emission source mechanism during fatigue crack propagation was initially believed to be the fracture of Mg2Si intermetallic inclusions which playa strong role in the crack propagation process.…”