Acoustic emission response of magnesium alloy during cyclic and creep tests

We studied the acoustic emission (AE) response to AZ31B alloy during cyclic and creep tests. The peak total AE event count appeared at the 400th cycle before material fracture during the compressive–tensile (C–T) cyclic test at a strain amplitude of 0.4%. In the case of 0.75% strain amplitude, the p...

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Published inMaterials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 668; pp. 120 - 124
Main Authors Kawai, Shinji, Yoshida, Yutaka, Asano, Hideyuki, Miura, Setsuo, Kobayashi, Michiaki, Shibano, Jun-ichi
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.06.2016
Subjects
Acoustic emission
Acoustic methods
Amplitudes
Counting
Creep (materials)
Creep test
Creep tests
Fracture mechanics
Law cyclic fatigue
Magnesium alloy
Magnesium base alloys
Strain
Acoustic methods
Law cyclic fatigue
Creep test
Magnesium alloy
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Summary:We studied the acoustic emission (AE) response to AZ31B alloy during cyclic and creep tests. The peak total AE event count appeared at the 400th cycle before material fracture during the compressive–tensile (C–T) cyclic test at a strain amplitude of 0.4%. In the case of 0.75% strain amplitude, the peak AE event count during compressive unloading occurred at approximately the 100th cycle before fracture. In creep tests at 423 and 523K, the AE event count in the tertiary creep stage involved increased activations of slips and cracks. The AE responses indicated the transition of the deformation mechanism. The results suggest that the fracture of magnesium alloys can be predicted on the basis of in situ AE measurements.
Bibliography:ObjectType-Article-1
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content type line 23
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2016.05.057