Evaluation of prediction models for crack length of duplex 2205 stainless steel based on acoustic emission technology

Ma, Yuefei; Liu, Meiyu; Yang, Lu; Dai, Peng

doi:10.1016/j.engfailanal.2022.106486

Cited by 7 publications

(1 citation statement)

References 37 publications

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“…AE is widely applied in various industrial applications such as pipelines [5], pressure vessels [6], machining processes [7], and bridge reliability [8]. Moreover, AE has been applied to diverse materials, including metals [9][10][11], composites [12][13][14], and polymers [15][16][17].…”

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confidence: 99%

Acoustic Emission Analysis for crack initiation in AA7075-T6 Alloy Under Multiaxial Fatigue

Lay,

Beigi,

Najafabadi

2024

Preprint

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In most critical components, fatigue occurs under mixed loadings, such as bending and tensile cyclic loading. Thus, preventing the multiaxial fatigue failure of sensitive structures, such as airframes, is crucial. Furthermore, in the realm of multiaxial fatigue conditions, scant information has been documented regarding the combination of cyclic bending and tensile loading. Therefore, in this paper, Acoustic Emission (AE) as a non-destructive method was used to investigate crack initiation in AA7075-T6 specimens subjected to multiaxial fatigue conditions involving bending and tensile cyclic loading. The results showed that generated AE signals had the same trend in all tests, and there was a reasonable correlation between AE and mechanical characteristics. By correlating mechanical data and AE data using the sentry function, the failure process, which includes dislocation movement, plastic deformation, work hardening, micro-crack formation, and crack initiation, respectively, was identified. The S-N curve was plotted for multiaxial fatigue conditions by using AE monitoring. This curve was depicted as non-destructive and based on the crack initiation cycle. Obtaining the S-N curve by AE monitoring will be of great help to designers in the design of sensitive structures under multiaxial fatigue loading conditions.

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