Study on Characteristics of Magnetic Memory Signal of Q345R Steel during the Tensile Process

DOI

10.2991/icmeme-16.2016.38How to use a DOI?

Keywords

magnetic memory, tensile process, initial yielding, mean local derivative

Abstract

A systematic experiment research is carried out on the study of magnetic memory, aiming at the problem of quantitative relationship between the strain varying process and the magnetic memory signals. The Q345R steel was used as the object material. A large plate specimen was used to perform the magnetic memory test at typical deformation stages of the stretching process. In this paper, a mean local derivative () method is put forward in the mathematical characterization of magnetic signal, which can eliminate the interference of accidental factors effectively, and provide the variation pattern of the magnetic signal in different deformation stages. Results indicate that the magnetic memory signal has special sensitivity to the initial yielding stage of the material. The characteristic of this stage is that experiences large fluctuation, whereas it does not necessarily get the maximum value. The mechanism of this phenomenon is that the non-uniform plastic strain changes the spontaneous magnetic field Hp inside the metal. In the elastic stage, Hp is linearly increasing with x, where is almost constant. In the strengthening stage with uniform large deformation, Hp gradually becomes stable and tends to zero.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Chao Yang
AU  - Yiliang Zhang
AU  - Xiaoyang Li
PY  - 2016/12
DA  - 2016/12
TI  - Study on Characteristics of Magnetic Memory Signal of Q345R Steel during the Tensile Process
BT  - Proceedings of the 5th International Conference on Mechanical Engineering, Materials and Energy (5th ICMEME2016)
PB  - Atlantis Press
SP  - 202
EP  - 208
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmeme-16.2016.38
DO  - 10.2991/icmeme-16.2016.38
ID  - Yang2016/12
ER  -