Based on the theory of information entropy, the acoustic emission (AE) signals of martensite, which were generated during the process of its phase transition, were studied. An accurate descriptive method was proposed by collecting the wavelet packet energy spectrum entropy, analyzing infor-mation of energy distribution in the frequency domain, extracting the energy spectrum entropy eigenvalue of different signals, and classifying the parameters by using the energy spectrum entropy eigenvalue as the sub-interval of the amplitude spectrum under gibbs entropy of time domain analysis. The eigenvalues of information entropy can accurately evaluate the variation of AE signals generated from martensitic transformation.
Catteau, S.D., H.P. Van Landeghem, J. Teixeira, J. Dulcy, M. Dehmas, S. Denis, A. Redjaïmia, and M. Courteaux, “Carbon and Nitrogen Effects on Microstructure and Kinetics Associated with Bainitic Transformation in a Low-Alloyed Steel,” Journal of Alloys and Compounds, Vol. 658, 2015, pp. 832–838.
Chiang, J., J.D. Boyd, and A.K. Pilkey, “Effect of Microstructure on Retained Austenite Stability and Tensile Behaviour in an Aluminum-Alloyed TRIP Steel,” Materials Science and Engineering: A, Vol. 638, 2015, pp. 132–142.
Coifman, R.R., and M.V. Wickerhauser, “Wavelets, Adapted Waveforms and De-noising,” Electroencephalography and Clinical Neurophysiology. Supplement, Vol. 45, 1996, pp. 57–78.
Gong, Qin, Y.E. Datian, Liansheng Guo, Liu Chan, “Approximate Entropy Analysis of Transient Evoked Otoacoustic Emissions (TEOAE) Signals and Its Application,” Journal of Tsinghua University, Science and Technology, Vol. 42, No. 3, 2002, pp. 299–303 (in Chinese).
He, Zhengyou, Yumei Cai, and Qingquan Qian, ”Wavelet Entropy Theory and Its Application in Power System Fault Detection Research,” Journal of Chinese Electrical Engineering Science, Vol. 25, No. 5, 2005, pp. 40–45.
Jacques, P., Q. Furnemont, T. Pardoen, and F. Delannay, “On the Role of Martensitic Transformation on Damage and Cracking Resistance in TRIP-assisted Multiphase Steels,” Acta Materialia, Vol. 49, No. 1, 2001, pp. 139–152.
Jiang, Wei Zhi, Bai-Qing Xu, Qin Shi, “Martensitic Transformation of Acoustic Emission.” Transactions of Materials and Heat Treatment, Vol. 6, No. 1, 1985, pp. 47–53 (in Chinese).
Kim, H.Y., Y. Ikehara, J.I. Kim, H. Hosoda, and Shuichi Miyazaki, “Marten-sitic Transformation, Shape Memory Effect and Superelasticity of Ti-Nb Binary Alloys,” Acta Materialia, Vol. 54, No. 9, 2006, pp. 2419–2429.
Koistinen, D.P., and R.E. Marburger, “A General Equation Prescribing the Extent of the Austenite-Martensite Transformation in Pure Iron-Carbon Alloys and Plain Carbon Steels,” Acta Materialia, Vol. 7, No. 1, 1959, pp. 59–60.
Li, C., and J.L. Wang, “Effect of Pre-quenching on Martensite Bainitic Microstructure and Mechanical-Properties of GCr15 Bearing Steel,” Journal of Materials Science, Vol. 28, No. 8, 1993, pp. 2112–2118.
Morito, S; H. Tanaka, R. Konishi, T. Furuhara, T. Maki, “The Morphology and Crystallography of Lath Martensite in Fe-C Alloys,” Acta Materialia, Vol. 51, No. 6, 2003, pp. 1789–1799.
Morscher, Gregory N. “Modal Acoustic Emission of Damage Accumula-tion in a Woven SiC/SiC Composite,” Composites Science and Technology, Vol. 59, No. 5, 1999, pp. 687–697.
Porter, D. and K. Easterling, Phase Transformations in Metals and Alloys, London, Chapman & Hall, 1993.
Prosser, W.H., K.E. Jackson, KE, S. Kellas, B.T. Smith, J. McKeon, and A. Friedman, “Advanced Wave-Form-Based Acoustic-Emission Detection of Matrix Cracking in Composites,” Materials Evaluation, Vol. 53, No. 9, 1995, pp. 1052–1058.
Wickerhauser, Mladen Victor, “Custom Wavelet Packet Image Compres-sion Design,” Proceedings IWISP ‘96 4-7 November 1996; Manchester, UK, 1996, pp. 47–52.
Xu, Zuyao, “Martensitic Phase Transformation and Martensite,” Science Press, 1999, pp. 46–52 (in Chinese).
Yin, Xinyun, Yongyong He, Zhike Peng, and Felei Chu, “Study on Wavelet Entropy and Its Applications in Trend Analysis,” Journal of Vibration Engineering, 2004, Vol.17, No. 2, 2004, pp. 49–53.
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