Feasibility study of monitoring the steel quenching process using acoustic emission technology

Mojškerc, Bor; Kek, Tomaž; Grum, Janez

doi:10.1016/j.apacoust.2017.08.013

Cited by 9 publications

(4 citation statements)

References 12 publications

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“…Nikhare et al [14] evaluated the relation of the acoustic signal and specimen size or temperature for quenching of tool steel. Mojškerc et al [15,16] presented a method of monitoring steel quenching with non-destructive AE measurements. This paper provides an AE method of monitoring quenching bath cooling conditions in order to establish improved control of liquid quenching baths.…”

Section: Introductionmentioning

confidence: 99%

Acoustic emission monitoring of immersion quenching bath attributes

Mojškerc¹,

Grum²,

Kek³

et al. 2023

eJNDT

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This paper describes the use of acoustic emission (AE) testing for monitoring immersion quenching bath attributes. Immersion quenching is a heat treatment process used to change the mechanical properties of metallic workpieces. The quenching bath cooling attributes degrade with prolonged use, thus affecting the workpiece mechanical properties. A non-destructive monitoring method of the quenching bath is required. An AE measurement system is proposed for this purpose. Steel specimens are quenched in tap water, deionized water, 5 % NaCl-water solution and 5 % detergent-water solution. AE is measured with four piezoelectric sensors. The influence of quenching bath attributes on specimen cooling is described together with the measured AE signals. AE signal peak amplitude diagrams are evaluated. A reference AE peak amplitude signal is presented with the measurements. The quenching bath attribute assessment method is established by monitoring the amount of outlying AE signals in regard to the reference AE signal. The results confirm that AE monitoring provides a decent way of assessing quenching bath attributes and thus also the quenched specimen mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Acoustic emission monitoring of immersion quenching bath attributes

Mojškerc¹,

Grum²,

Kek³

et al. 2023

eJNDT

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“…Luo et al (2016) showed that the effect of expulsion can be analyzed by the AE signals detected in a welding process. Mojškerc et al (2018) concluded that AE is a reasonable way to monitor the steel quenching process and mechanical properties of quenched workpieces. The AE technique was also adopted to monitor the fracture behavior of steels during tensile tests (Chuluunbat et al, 2019; Lyasota et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Feasibility of studying 460 MPa high-strength steel affected by strain aging with acoustic emission method

Yang

Wang

2020

Advances in Structural Engineering

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Strain aging significantly influences the behavior of partially damaged structural steel. The effects of strain aging can be determined based on mechanical experiments, but the sampling process causes further damage to the structures. To explore the possibility of using nondestructive testing (NDT) technology to distinguish the strain aging effects on steel materials, this study investigates the characteristics of acoustic emission (AE) signals for high-strength steel (HSS) affected by strain aging. First, different strain aging effects were applied to 460 MPa HSS specimens. Second, pencil lead break (PLB) tests were performed on the specimens with strain aging, and the generated AE signals were recorded. Finally, tensile tests were conducted, that the strain aging effects on mechanical behavior were determined. The obtained AE signals were compared by extracting the AE parameters and analyzed in the frequency and time-frequency domains with a fast Fourier transform (FFT) and a wavelet transform (WT), respectively. The study shows that the strain aging effects change the characteristics of the AE signals. Compared to the prestrain, the aging time has a more pronounced impact on the AE behaviors. This research proposes a possible NDT method to determine the effects of strain aging on steel materials. Experimental data are provided to detect the degree of partial damage to 460 MPa HSS owing to strain aging using the AE method.

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“…Previously, acoustic measurements have been used to characterize fundamental mechanisms underlying nucleate and film boiling like bubble generation, collapse and coalescence [28][29][30][31][32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

“…Bubble-related phenomena have an acoustic signature, which depends on the bubble size, superheat and liquid properties. Application-oriented studies have utilized acoustic signature tracking to understand boiling in a reactor core [29], quenching of metals [34,35,36] and pump cavitation [37,38]. Acoustics has also been utilized to study droplet impact on surfaces [39].…”

Section: Introductionmentioning

confidence: 99%

Acoustic detection of electrostatic suppression of the Leidenfrost state

2018

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At high temperatures, a droplet can rest on a cushion of its vapor (the Leidenfrost effect). Application of an electric field across the vapor gap fundamentally eliminates the Leidenfrost state by attracting liquid towards the surface. This study uses acoustic signature tracking to study electrostatic suppression of the Leidenfrost state on solid and liquid surfaces. It is seen that the liquid-vapor instabilities that characterize suppression on solid surfaces can be detected acoustically. This can be the basis for objective measurements of the threshold voltage and frequency required for suppression. Acoustic analysis provides additional physical insights that would be challenging to obtain with other measurements. On liquid surfaces, the absence of an acoustic signal indicates a different suppression mechanism (instead of instabilities). Acoustic signature tracking can also detect various boiling patterns associated with electrostatically assisted quenching. Overall, this work highlights the benefits of acoustics as a tool to better understand electrostatic suppression of the Leidenfrost state, and the resulting heat transfer enhancement.

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Feasibility study of monitoring the steel quenching process using acoustic emission technology

Cited by 9 publications

References 12 publications

Acoustic emission monitoring of immersion quenching bath attributes

Acoustic emission monitoring of immersion quenching bath attributes

Feasibility of studying 460 MPa high-strength steel affected by strain aging with acoustic emission method

Acoustic detection of electrostatic suppression of the Leidenfrost state

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