Acoustic emission behavior of 12MnNiVR steel under stretching

作者：Li G.; Jiao J.; Wang X.; He C.; Wu B.

来源：China Mechanical Engineering, 2016, 27(13): 1760-1766.

DOI：10.3969/j.issn.1004-132X.2016.13.012

• Acoustic emission (AE)
• Characteristic parameter
• Hilbert-Huang transform (HHT)
• Large atmospheric tank

Several methods of characteristic parameter analyses were introduced to analyze AE signals in stretching process of 12MnNiVR steel used in large atmospheric tank. These parameters included signal amplitudes, counts, hits and energy. Furthermore, the stretching process at different stages of a typical AE signal waveforms were also analyzed including time-domain waveform, spectrum, Hilbert time-frequency distribution etc. The results show that the characteristic parameters and waveform analysis of AE signals may reflect the different characteristics of the tensile deformation stages. AE technique can be used to characterize material stretching processes.

• 出版日期2016
• 单位北京大学