Analysis of acoustic emission signals originating from bainite and martensite formation
Analysis of acoustic emission signals originating from bainite and martensite formation
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贝氏体和马氏体形成的声发射信号分析
DOI：
10.1080/14786430412331331970
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发表时间：
2005
影响因子：
1.6
通讯作者：
I. Richardson
中科院分区：
文献类型：
--
作者：
S. V. Bohemen;J. Sietsma;M. Hermans;I. Richardson
本文研究了贝氏体和马氏体形成过程中声信号的特征。的结果进行了讨论，在半定量的方式，因为一个彻底的定量分析的信号是不可行的，因为有限的频率带宽的系统和内部样品的反射对信号的影响。采用塑性变形声发射研究中的位错源模型解释了声发射信号的频谱。假定在位移相变期间声发射（AE）的主要来源是位错的运动，即在生长期间为了释放内应力而发生的滑移。结果表明，贝氏体形成过程中声发射信号的平均频率明显大于马氏体声发射信号的平均频率。AE信号的谱密度的这种差异可以归因于两种变换的界面运动的差异以及所涉及的位错的相应不同行为。
In this paper the characteristics of acoustic signals generated during bainite and martensite formation are studied. The results are discussed in a semi-quantitative manner, since a thorough quantitative analysis of the signals is not feasible because of the limited frequency bandwidth of the system and the effect of internal sample reflections on the signal. The frequency spectra of acoustic emission signals are interpreted using a dislocation source model adopted from acoustic emission studies of plastic deformation. It is assumed that the predominant source of acoustic emission (AE) during displacive transformations is the movement of dislocations, i.e. the slip taking place during growth in order to relieve internal stresses. The results show that the mean frequency of AE signals generated during bainite formation is significantly larger than that of martensitic AE signals. This difference in the spectral density of the AE signals can be attributed to the difference in interface motion of the two transformations, and the consequent different behaviour of the dislocations involved.
DOI：
10.1051/jp4:2003877
发表时间：
2003-10
期刊：
Journal De Physique Iv
影响因子：
--
作者：
T. Furuhara;S. Morito;T. Maki
通讯作者：
T. Furuhara;S. Morito;T. Maki