A mechanism study on influence of strong external magnetic field on fracture properties of a ferromagnetic steel

Zheng Xie; Manru He; Panpan Xu; Qun Li; Cuixiang Pei; Shejuan Xie; Zhenmao Chen

doi:10.1063/1.5088876

AIP Advances (Jul 2019)

A mechanism study on influence of strong external magnetic field on fracture properties of a ferromagnetic steel

Zheng Xie,
Manru He,
Panpan Xu,
Qun Li,
Cuixiang Pei,
Shejuan Xie,
Zhenmao Chen

Affiliations

Zheng Xie: Shaanxi Engineering Research Center of NDT and Structural Integrity, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China
Manru He: Shaanxi Engineering Research Center of NDT and Structural Integrity, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China
Panpan Xu: Shaanxi Engineering Research Center of NDT and Structural Integrity, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China
Qun Li: Shaanxi Engineering Research Center of NDT and Structural Integrity, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China
Cuixiang Pei: Shaanxi Engineering Research Center of NDT and Structural Integrity, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China
Shejuan Xie: Shaanxi Engineering Research Center of NDT and Structural Integrity, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China
Zhenmao Chen: Shaanxi Engineering Research Center of NDT and Structural Integrity, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China

DOI: https://doi.org/10.1063/1.5088876
Journal volume & issue: Vol. 9, no. 7
pp. 075219 – 075219-5

Abstract

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For some ferromagnetic metallic materials, measurable influence of strong external magnetic field on their fracture properties has been observed experimentally, i.e., an external magnetic field of large intensity can promote the propagation of the crack. In order to clarify the mechanism of this phenomenon, a fracture model is put forward in this paper based on reversal magnetic domain theory and minimum free energy algorithm and verified through observations of magnetic domains structure. Compact tensile (CT) specimens which were stretched in strong magnetic field are adopted to observe their magnetic domains structure with the powder grain method in practice. It is found that the crack in the CT specimen propagated mainly along the magnetic domain wall rather than passing through the domain body. Together with the experimental results, the fracture model for the rupture and propagation mechanism under strong magnetic field was discussed.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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