The Use of Acoustic Emission and Neural Network in the Study of Phase Transformation below MS

Łazarska, Malgorzata; Woźniak, T. Z.; Ranachowski, Z.; Trafarski, Andrzej; Marciniak, S.

doi:10.3390/ma14030551

Cited by 2 publications

(4 citation statements)

References 21 publications

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“…Acoustic emission signals can be recorded and analysed during the phase transformations of carbon steel [ 13 ]. AE is a suitable tool for the design of the optimal heat treatment and microstructure shaping [ 11 , 14 ]. The physical basis of the acoustic emission event during phase transformations lies in the deformation processes and the structural transformations [ 15 ].…”

Section: Resultsmentioning

confidence: 99%

“…Barkhausen noise is caused by internal stress fields and depends on the steel microstructure [ 10 ]. The author [ 11 ] states that the frequency of 20–900 kHz was used for the AE probe and the converter sampling frequency of 1.2 MHz was used for the analysis of phase transformations below Ms. On the basis of previous experience and according to the research processing issue, it is possible to predict the development and research focused on austenitisation criteria.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Degradation of Pearlitic Steel Mechanical Properties Depending on the Stability of the Structural Phases

et al. 2023

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The paper is focused on analysing the pearlitic steel phase transformations and their influence on the mechanical properties. The intention is to perform a detailed analysis of the heat treatment process using the exact heating temperature and chemical composition to achieve the optimal mechanical properties of the tool. The key area is monitoring and regulating the heat treatment. This technology is constantly undergoing an optimisation process and is an effort to introduce new trends in monitoring phase transformations and processes. The use of non-destructive methods is an adequate tool. The principle is to determine the exact structural phase at a given moment, which can be very difficult when a complex shaped part is heat treated. Which precludes the use of some other methods of phase transformation analysis. Specifically, the determination of the exact moment of finish of the austenitisation process is eminent. The monitoring of these processes will be ensured by both a non-contact pyrometer and also by the AE method with an adequate sensor and waveguide. The resulting structural phases formed after the heat treatment will be evaluated by electron microscopy, followed by the analysis of the mechanical properties of selected steels.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the Degradation of Pearlitic Steel Mechanical Properties Depending on the Stability of the Structural Phases

et al. 2023

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“…Then, based on the information about the phase transformations taking place in the tested material, the AE signals were assigned to specific phase transformations. Acoustic emission offers us new opportunities to track changes in the material during thermal processes [10,[29][30][31][32]. This method also creates the possibility of obtaining the correlation of recorded EA signals with the microstructure [30].…”

Section: Methodsmentioning

confidence: 99%

“…During phase transformations, acoustic effects are generated as a result of dynamic triggering of cumulated energy. Due to the non-invasive method of measuring acoustic emission, it is possible to monitor transformation processes in steel [8][9][10][11]. As a result of changes in the tested object, elastic waves are propagated.…”

Section: Introductionmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Trafarski,

Łazarska,

Ranachowski

2021

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of acoustic emission during heat treatment processes show that this method is the source of relevant information about the phenomena occurring in the processed material [6,7,11,12]. Measurement of acoustic emission signals is performed using the passive method. The apparatus used has no influence on the tested object. Registered signals are related only to the acoustic effects occurring in the material under study [13]. Sources of acoustic emission in metals are [3,5,[14][15][16][17][18][19][20][21]: dislocation motion due to plastic deformation, formation of twins, phase transitions of the displacive type, micro and macro cracks. Acoustic emission is a method of obtaining new information about phenomena occurring during phase changes. The applied research techniques may be used in the industry to test large samples in the future. Monitoring of heat treatment processes is vitally important for the utility values of finished industrial products. By tracking the breakdown kinetics of supercooled austenite, processes can be regulated and improved. New solutions and technologies in this aspect are still being searched for. MATERIALS AND METHODS Research materialThe samples were prepared from 27MnCrB5-2 steel. Samples were taken and prepared from one steel rod. Cylindrical specimens with diameters of 22 mm and height of 25 mm were made. The chemical composition of 27MnCrB5-2 steel is presented in Table 1.The steel subjected to the tests is used in the automotive industry for fasteners of machine parts. The fasteners are heat treated to improve the properties of the material from which they are made. During the tests, the continuous cooling process was performed on the samples.

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The Use of Acoustic Emission and Neural Network in the Study of Phase Transformation below MS

Cited by 2 publications

References 21 publications

Analysis of the Degradation of Pearlitic Steel Mechanical Properties Depending on the Stability of the Structural Phases

Analysis of the Degradation of Pearlitic Steel Mechanical Properties Depending on the Stability of the Structural Phases

Bulletin of the Polish Academy of Sciences: Technical Sciences

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