The Use of the Acoustic Emission Method to Identify Crack Growth in 40CrMo Steel

The article presents the application of the acoustic emission (AE) technique for detecting crack initiation and examining the crack growth process in steel used in engineering structures. The tests were carried out on 40CrMo steel specimens with a single edge notch in bending (SENB). In the tests cr...

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Main Authors:	Aleksandra Krampikowska, Robert Pała, Ihor Dzioba, Grzegorz Świt
Format:	Article
Language:	English
Published:	MDPI AG 2019-07-01
Series:	Materials
Subjects:	pattern recognition acoustic emission Structural Health Monitoring brittle fracture diagnostics
Online Access:	https://www.mdpi.com/1996-1944/12/13/2140

id	doaj-105937b34d854fdfa488e9e5eaea3fe1
record_format	Article
spelling	doaj-105937b34d854fdfa488e9e5eaea3fe12020-11-25T01:42:51ZengMDPI AGMaterials1996-19442019-07-011213214010.3390/ma12132140ma12132140The Use of the Acoustic Emission Method to Identify Crack Growth in 40CrMo SteelAleksandra Krampikowska0Robert Pała1Ihor Dzioba2Grzegorz Świt3Department of Strength of Materials, Concrete and Bridge Structures, Kielce University of Technology, Al. 1000-lecia PP 7, 25-314 Kielce, PolandFaculty of Mechatronics and Mechanical Engineering, Department of Machine Design, Kielce University of Technology, Al. 1000-lecia PP 7, 25-314 Kielce, PolandFaculty of Mechatronics and Mechanical Engineering, Department of Machine Design, Kielce University of Technology, Al. 1000-lecia PP 7, 25-314 Kielce, PolandDepartment of Strength of Materials, Concrete and Bridge Structures, Kielce University of Technology, Al. 1000-lecia PP 7, 25-314 Kielce, PolandThe article presents the application of the acoustic emission (AE) technique for detecting crack initiation and examining the crack growth process in steel used in engineering structures. The tests were carried out on 40CrMo steel specimens with a single edge notch in bending (SENB). In the tests crack opening displacement, force parameter, and potential drop signal were measured. The fracture mechanism under loading was classified as brittle. Accurate AE investigations of the cracking process and SEM observations of the fracture surfaces helped to determine that the cracking process is a more complex phenomenon than the commonly understood brittle fracture. The AE signals showed that the frequency range in the initial stage of crack development and in the further crack growth stages vary. Based on the analysis of parameters and frequencies of AE signals, it was found that the process of apparently brittle fracture begins and ends according to the mechanisms characteristic of ductile crack growth. The work focuses on the comparison of selected parameters of AE signals recorded in the pre-initiation phase and during the growth of brittle fracture cracking.https://www.mdpi.com/1996-1944/12/13/2140pattern recognitionacoustic emissionStructural Health Monitoringbrittle fracturediagnostics
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Aleksandra Krampikowska Robert Pała Ihor Dzioba Grzegorz Świt
spellingShingle	Aleksandra Krampikowska Robert Pała Ihor Dzioba Grzegorz Świt The Use of the Acoustic Emission Method to Identify Crack Growth in 40CrMo Steel Materials pattern recognition acoustic emission Structural Health Monitoring brittle fracture diagnostics
author_facet	Aleksandra Krampikowska Robert Pała Ihor Dzioba Grzegorz Świt
author_sort	Aleksandra Krampikowska
title	The Use of the Acoustic Emission Method to Identify Crack Growth in 40CrMo Steel
title_short	The Use of the Acoustic Emission Method to Identify Crack Growth in 40CrMo Steel
title_full	The Use of the Acoustic Emission Method to Identify Crack Growth in 40CrMo Steel
title_fullStr	The Use of the Acoustic Emission Method to Identify Crack Growth in 40CrMo Steel
title_full_unstemmed	The Use of the Acoustic Emission Method to Identify Crack Growth in 40CrMo Steel
title_sort	use of the acoustic emission method to identify crack growth in 40crmo steel
publisher	MDPI AG
series	Materials
issn	1996-1944
publishDate	2019-07-01
description	The article presents the application of the acoustic emission (AE) technique for detecting crack initiation and examining the crack growth process in steel used in engineering structures. The tests were carried out on 40CrMo steel specimens with a single edge notch in bending (SENB). In the tests crack opening displacement, force parameter, and potential drop signal were measured. The fracture mechanism under loading was classified as brittle. Accurate AE investigations of the cracking process and SEM observations of the fracture surfaces helped to determine that the cracking process is a more complex phenomenon than the commonly understood brittle fracture. The AE signals showed that the frequency range in the initial stage of crack development and in the further crack growth stages vary. Based on the analysis of parameters and frequencies of AE signals, it was found that the process of apparently brittle fracture begins and ends according to the mechanisms characteristic of ductile crack growth. The work focuses on the comparison of selected parameters of AE signals recorded in the pre-initiation phase and during the growth of brittle fracture cracking.
topic	pattern recognition acoustic emission Structural Health Monitoring brittle fracture diagnostics
url	https://www.mdpi.com/1996-1944/12/13/2140
work_keys_str_mv	AT aleksandrakrampikowska theuseoftheacousticemissionmethodtoidentifycrackgrowthin40crmosteel AT robertpała theuseoftheacousticemissionmethodtoidentifycrackgrowthin40crmosteel AT ihordzioba theuseoftheacousticemissionmethodtoidentifycrackgrowthin40crmosteel AT grzegorzswit theuseoftheacousticemissionmethodtoidentifycrackgrowthin40crmosteel AT aleksandrakrampikowska useoftheacousticemissionmethodtoidentifycrackgrowthin40crmosteel AT robertpała useoftheacousticemissionmethodtoidentifycrackgrowthin40crmosteel AT ihordzioba useoftheacousticemissionmethodtoidentifycrackgrowthin40crmosteel AT grzegorzswit useoftheacousticemissionmethodtoidentifycrackgrowthin40crmosteel
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The Use of the Acoustic Emission Method to Identify Crack Growth in 40CrMo Steel

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