1. Barkhausen Noise for Non-destructive Testing and Materials Characterization in Low Carbon Steels (1st Edition)

Editors: Tu Le Manh Jose Alberto Benitez Perez J. H. Espina Hernández Jose Manuel Hallen Lopez

Paperback ISBN: 9780081028001

Imprint: Woodhead Publishing

Published Date: 1st June 2020

The purpose in writing this book is to share and provide knowledge about this interesting phenomenon and some new discoveries we have obtained recently on the topic such as the correlation between magnetocrystalline energy (derived from X-ray macrotexture and EBSD microtexture) and Barkhausen noise, new mathematical model describing this correlation, new approach on using EBSD to characterize and analyse the phenomenon, relationship between the crystallographic texture and Barkhausen noise, and the possibility to apply this technique as a non-destructive method for characterizing materials and studying magnetic anisotropy in ferromagnetic materials. This future book is important due to the fact that although Barkhausen effect has been known for many years ago, the knowledge on this phenomenon is not completed. Furthermore, the number of books published about Barkhausen noise is very little. Some classic books can be mentioned as Physics of ferromagnetism (Chikazumi), Introduction to magnetic materials (Cullity), Hysteresis in magnetism (Giorgio Bertotti), and Introduction to magnetism and magnetic materials (D. C. Jiles), and a more recent books of Stefanita, From Bulk to Nano: The Many Sides of Magnetism and Magnetism: Basics and Applications. However, they only mention partly about Barkhausen effect and most of the information has been known. Therefore, the information is needed to be updated and discussed thoroughly.

Book description

The Barkhausen effect is a phenomenon given to the noise produced in a ferromagnetic material when it is magnetized using a varying applied magnetic field. Discovered by German physicist Heinrich Barkhausen in 1919, it is the first experimental evidence supporting the domain theory of ferromagnetism proposed in 1906 by Pierre-Ernest Weiss. This phenomenon is due to the irreversible motion and rotation of magnetic domain walls (DW) when interacting with the material´s microdefects. The discontinuous motion of DWs causes fluctuations in the magnetic flux in the material´s surface, which can be measured using a magnetic sensor. The measured signal is known as Barkhausen noise (BN) or Magnetic Barkhausen noise (MBN) in some literatures, which contains many information associated with the material´s microstructure. This book describes fundamentals of Barkhausen noise, stochastic nature and deterministic behaviour, and the possibility of applying this technique as a non-destructive testing method and material´s characterization. Analysing this signal, it is possible to obtain information about chemical composition, grain size, residual/applied stress, stress anisotropy, plastic deformation, hardness, and magnetocrystalline energy. Due to all these benefits, Barkhausen noise has become one of the most useful techniques of non-destructive inspection methods nowadays in ferromagnetic materials for different fields such as aerospace and mechanical engineering.

Table of Contents

1. Origin and applications of Barkhausen noise

2. Measurements methods

3. Quantitative characterization of Barkhausen noise

4. Materials

5. Barkhausen noise as a non-destructive testing tool

6. Correlation between Barkhausen noise and magnetocrsyatalline energy (MCE)

7. Model for the correlation between Barkhausen noise and magnetocrsyatalline energy

8. Future trends and application of Barkhausen noise

Audience:

Ø Scientist, researchers, engineering students.

Ø Pipeline company, non-destructive testing company, Nuclear energy company, metallurgical plants.