PSI - Issue 23

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 23 (2019) 57–62

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers © 201 9 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. Acous c Emiss on (AE) method for material state monitoring during fatigue tests was attested for turbi e blad durability estim tion for different types of superalloys. Average value of summarized AE s gnals, N̅ ae , r gistered during the beginning of ests an summarized AE-signals, ( N ae ) 01 , in the second semi-cycle of blade bending both have good correlation with that blades reached at the mom nt of fracture. The discovered relations betwee summarized AE signals and durability de onstrated the high value of the correlation factor. For the oment of crack origination, the umber of cycles, ( N f ) α , can be simulated also by the i l , ( N ae ) t , registered during tim interval in several minutes. In all discuss cases, relations between parameters of AE signals and critical values of the cycle’s number for estimating durability introduced with discovered factors. © 201 9 The Authors. Published by Elsevier B.V. This is an ope access article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 9th International Conference on Materials Structure and Micromechanics of Fracture Durability diagnostics of turbine blades based on non-destructive acoustic emission testing A.A. Shanyavskiy a * , M.D. Banov a a Aviation Register for Russian Federation, Airport Sheremetievo-1, PO Box 54, Moscow region, Chimkinskiy State, 141426, Russia 9th International Conference on Materials Structure and Micromechanics of Fracture Durability diagnostics of turbine blades based on non-destructive acoustic emission testing A.A. Shanyavskiy a * , M.D. Banov a a Aviation Register for Russian Federation, Airport Sheremetievo-1, PO Box 54, Moscow region, Chimkinskiy State, 141426, Russia Abstract Abstract Acoustic Emission (AE) method for material state monitoring during fatigue tests was attested for turbine blade durability estimation for different types of superalloys. Average value of summarized AE signals, N̅ ae , registered during the beginning of tests and summarized AE-signals, ( N ae ) 01 , in the second semi-cycle of blade bending both have good correlation with durability that blades reached at the moment of fracture. The discovered relations between summarized AE signals and durability demonstrated the high value of the correlation factor. For the moment of crack origination, the number of cycles, ( N f ) α , can be simulated also by the AE signals, ( N ae ) t , registered during time interval in several minutes. In all discussed cases, relations between parameters of AE signals and critical values of the cycle’s number for estimating durability introduced with discovered factors.

Keywords: acoustic emission; diagnostics; fatigue; durability; turbine; blade Keywords: acoustic emission; diagnostics; fatigue; durability; turbine; blade

1. Introduction 1. Introduction

Damages accumulation for in-service blades of different stages of a gas-turbine-engine (GTE) can be realized because of the wide range of causes discussed by Shanyavskiy (1999, 2005, 2006, 2014). First, Shanyavskiy (1999) pointed out that inside of an engine foreign objects that interacted with blade introducing stress concentrator changing its stress-state can be introduced. In some cases, it can be directed to air intake surge. Damages accumul tion for in-service bla es of different stages of a gas-turbine-engine (GTE) can be realized because f the wide range of causes discussed by Shanyavskiy (1999, 2005, 2006, 2014). First, Shanyavskiy (1999) poi ted out that inside of an engine foreign objects that i teracted with blade introducing stress concentrator changing its stress-state can be introduced. In some cases, it can be directed to air intake surge.

* Corresponding author. Tel.: +7-495-578-5288; fax: +7-495-730-6094. E-mail address: 106otdel@mail.ru * Correspon ing auth r. Tel.: +7-495-578-5288; fax: +7-495-730-6094. E-mail address: 106otdel@mail.ru

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the scientific committee of the IC MSMF organizers.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers 10.1016/j.prostr.2020.01.063