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Acoustic Emission Characteristics of s30408 Steel During Tensile Test
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DOI：10.1007/s40799-026-00876-y.png)
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Abstract
En 中文
This study investigates the influence of strain rate on the tensile behavior and acoustic emission (AE) characteristics of s30408 austenitic stainless steel, a material critical for cryogenic and corrosive environments. Uniaxial tensile tests were conducted at strain rates of 4.8 & times; 10(- 4), 9.5 & times; 10(- 4), and 1.9 & times; 10(- 3) s(-1), with synchronized AE monitoring using a broadband transducer system. AE parameters, including amplitude, duration, ring-down counts, and energy, were analyzed to cor-relate microstructural damage mechanisms with deformation stages. Results demonstrated that increasing strain rates significantly elevated the occurrence of medium-high amplitude AE events (> 60 dB) and total AE activity, attributed to accelerated dislocation dynamics, microcrack propagation, and phase transformations. Notably, specimens tested at 1.9 & times; 10- 3 s-1 exhibited distinct continuous-type AE signals during necking, corresponding to dislocation avalanches and energy superposition due to suppressed annihilation mechanisms at high strain rates. A power-law relationship was estab-lished between AE energy and signal duration, with deviations observed at high strain rates
Keywords:
s30408 stainless steel
Strain rate
Acoustic emission
Tensile behaviour
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E
IF:
1.9
Papers:
50
Citations:
1.6K
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