The Influence of Different Microstructure on Tensile Deformation and Acoustic Emission Behaviors of Low-Alloy Steel
1
School of Energy and Power Engineering, Beihang University, Beijing 100191, China
2
School of Materials Science and Engineering, Beihang University, Beijing 100191, China
3
Beijing Advanced Innovation Centre for Biomedical Engineering, Beihang University, Beijing 100191, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(21), 4981; https://doi.org/10.3390/ma13214981
Received: 8 October 2020
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Revised: 4 November 2020
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Accepted: 4 November 2020
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Published: 5 November 2020
The effect of different microstructures, obtained under different tempering temperatures on acoustic emission (AE) characteristics and source mechanisms during tensile deformation, was investigated in this study. Different heat treatments were carried out on hot-rolled low-alloy steels to obtain different microstructures (ferrite/pearlite, tempered martensite and tempered sorbite) and the AE was used to monitor the deformation and fracture process of samples of different types (BM, 200 °C tempered and 600 °C tempered). The results showed that the microstructure had different influences on the high amplitude burst-type signals and low amplitude continuous-type signals during the deformation and fracture process of low-alloy steels. In the 200 °C tempered sample, the continuous-type signals were enhanced by the high yield stress and dislocation velocity induced by the block of the lath martensite whose substructure was high-density dislocation. On the other hand, the interaction of the precipitates with the local dislocations increased the intensity of AE events, thus generating burst-type signals with higher amplitude in the 600 °C tempered samples.
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MDPI and ACS Style
Ma, W.; Luo, H.; Han, Z.; Zhang, L.; Yang, X. The Influence of Different Microstructure on Tensile Deformation and Acoustic Emission Behaviors of Low-Alloy Steel. Materials 2020, 13, 4981. https://doi.org/10.3390/ma13214981
AMA Style
Ma W, Luo H, Han Z, Zhang L, Yang X. The Influence of Different Microstructure on Tensile Deformation and Acoustic Emission Behaviors of Low-Alloy Steel. Materials. 2020; 13(21):4981. https://doi.org/10.3390/ma13214981
Chicago/Turabian StyleMa, Wenbin, Hongyun Luo, Zhiyuan Han, Linyan Zhang, and Xiaoguang Yang. 2020. "The Influence of Different Microstructure on Tensile Deformation and Acoustic Emission Behaviors of Low-Alloy Steel" Materials 13, no. 21: 4981. https://doi.org/10.3390/ma13214981
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