Experimental characterisation of laser surface remelting via acoustic emission wavelet decomposition

Mojškerc, Bor (avtor), Ravnikar, Dunja (avtor), Šturm, Roman (avtor)

This paper presents a novel technique of monitoring laser surface remelting (LSR) via measurements of process generated acoustic emission (AE). The LSR conditions include a variable laser power level and an ambient air or argon 5.0 inert gas atmosphere. The microstructure and microhardness of the remelted surface layer are evaluated. The recorded AE signal datasets are analysed via the wavelet decomposition technique. The resulting energy and energy proportions of approximation and detail coefficients are calculated. The decomposed AE signal features are evaluated in correlation with the LSR process conditions. A supervised machine learning cubic support vector machine classifier type is used for the classification of laser pulses. The experimental results show an overall 98% classification accuracy into the corresponding LSR laser power level and atmosphere conditions, confirming the utility of monitoring the LSR process and the resulting material surface layer characteristics via the AE wavelet decomposition technique.

• Jezik: Angleški jezik
• Ključne besede: lasers, surface remelting, acoustic emission, signal processing, wavelet
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: Str. 3365-3374
• Številčenje: Vol. 15
• PID: 20.500.12556/RUL-132158
• UDK: 621.7+621.9:535(045)
• ISSN pri članku: 2238-7854
• DOI: 10.1016/j.jmrt.2021.10.010
• COBISS.SI-ID: 80445699
• Datum objave v RUL: 14.10.2021

Gradivo je del revije

• Naslov: Journal of materials research and technology
• Skrajšan naslov: J. mater. res. technol.
• Založnik: Elsevier
• ISSN: 2238-7854
• COBISS.SI-ID: 519699737

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: laserji, površinsko pretaljevanje, akustična emisija, procesiranje signalov, valčna dekompozicija

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0270
• Naslov: Proizvodni sistemi, laserske tehnologije in spajanje materialov