Acoustic emission monitoring of crack propagation in additively manufactured and conventional titanium components

Strantza, Maria; Van Hemelrijck, Danny; Guillaume, Patrick; Aggelis, Dimitrios G.

doi:10.1016/j.mechrescom.2017.05.009

Title: Acoustic emission monitoring of crack propagation in additively manufactured and conventional titanium components

Journal Article · Tue May 30 20:00:00 EDT 2017 · Mechanics Research Communications

DOI: https://doi.org/10.1016/j.mechrescom.2017.05.009 · OSTI ID:1415387

^[1]; Van Hemelrijck, Danny ^[1]; Guillaume, Patrick ^[1]; Aggelis, Dimitrios G. ^[1]

Vrije Universiteit Brussel (VUB), Brussels (Belgium)

We report that additive manufacturing (AM) is a novel and innovative production technology that can produce complex and lightweight engineering products. In AM components, as in all engineering materials, fatigue is considered as one of the principle causes of unexpected failure. In order to detect, localise and characterise cracks in various material components and metals, acoustic emission (AE) is used as a non-destructive monitoring technique. One of the main advantages of AE is that it can be also used for dynamic damage characterisation and specifically for crack propagation monitoring. In this research, we use AE to monitor the fatigue crack growth behaviour of Ti6Al4V components under four-point bending. The samples were produced by means of AM as well as conventional material. Notched and unnotched specimens were investigated with respect to the crack severity and crack detection using AE. The main AE signal parameters –such as cumulative events, hits, duration, average frequency and rise time– were evaluated and indicate sensitivity to damage propagation in order to lead to a warning against the final fracture occurrence. Finally, this is the first time that AE is applied in AM components under fatigue.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1415387

Report Number(s):: LA-UR--17-24367

Journal Information:: Mechanics Research Communications, Journal Name: Mechanics Research Communications Journal Issue: C Vol. 84; ISSN 0093-6413

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Scale Effect on the Anisotropy of Acoustic Emission in Coal Song, Honghua; Zhao, Yixin; Jiang, Yaodong Shock and Vibration, Vol. 2018 https://doi.org/10.1155/2018/8386428	journal	December 2018
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Title: Acoustic emission monitoring of crack propagation in additively manufactured and conventional titanium components

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