PSI - Issue 16

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

www.elsevier.com/locate/procedia

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ScienceDirect

Procedia Structural Integrity 16 (2019) 198–204

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers. © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers Keywords: eddy current method; double differential eddy current probe; operational frequency; ferrous steel structure; flaw; crack; gas turbine blade; forging; inspection productivity Application of eddy current method for detection of the cracks in f rrous ste l str ctures and compon nts is formidable due to additional noise originat d from steel magne ic and structural heterogeneity an geometrical irregularity of i spected urface. These factors throw down a real challenge to EC inspection practice. Presented double differential type probes can create good background to solve these problems. In this study investigations concerned with double differential EC probe and some specific inspection applications are presented. © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers Keywords: eddy current method; double differential eddy current probe; operational frequency; ferrous steel structure; flaw; crack; gas turbine blade; forging; inspection productivity 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” Detection of cracks in ferrous steel structures: new innovative eddy current techniques Valentyn Uchanin a *, Giuseppe Nardoni b a Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, 5, Naukova St., Lviv, 79060, Ukraine b I&T Nardoni Institute, Via Della Cascina Pontevica,1B, Folzano, Brescia , 25010, Italy 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” Detectio of cracks in ferrous ste l structures: new innovative eddy current techniques Valentyn Uchanin a *, Giuseppe Nardoni b a Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, 5, Naukova St., Lviv, 79060, Ukraine b I&T Nardoni Institute, Via Della Cascina Pontevica,1B, Folzano, Brescia , 25010, Italy Abstract Application of eddy current method for detection of the cracks in ferrous steel structures and components is formidable due to additional noise originated from steel magnetic and structural heterogeneity and geometrical irregularity of inspected surface. These factors throw down a real challenge to EC inspection practice. Presented double differential type probes can create good background to solve these problems. In this study investigations concerned with double differential EC probe and some specific inspection applications are presented. Eddy current (EC) method is widely applied for detection and sizing of the fatal flaws (e.g. cracks) in the responsible structures and components. Application of EC method for detection of the cracks in ferrous steel components is formidable over additional noise originated from magnetic and structural heterogeneity of inspected material and geometrical irregularity of inspected surface. These factors throw down a real challenge to EC inspection practice. As a result, in many documents and papers EC method was defined as inapplicable or low Eddy current (EC) method is widely applied for detection and sizing of the fatal flaws (e.g. cracks) in the responsible structures and components. Application of EC method for detection of the cracks in ferrous steel components is formidable over additional noise originated from magnetic and structural heterogeneity of inspected material and geometrical irregularity of inspected surface. These factors throw down a real challenge to EC inspection practice. As a result, in many documents and papers EC method was defined as inapplicable or low bstract 1. Introduction 1. Introduction

* Corresponding author. Tel.: +38-032-229-6166; fax: +38-032-264-9427. E-mail address: vuchanin@gmail.com

2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers 2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers * Corresponding author. Tel.: +38-032-229-6166; fax: +38-032-264-9427. E-mail address: vuchanin@gmail.com

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers. 10.1016/j.prostr.2019.07.041