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| Investigation of Electromagnetic Properties of 304 Austenitic Stainless Steel with Plastic Deformation and Fatigue Damage and Microstructure Analysis |
| Xie Shejuan1, 2, Wu Lei1, Tong Zongfei1, Yang Qingning1, Chen Zhenmao1, Zhu Guangyi2, Li Peng2 |
1. State Key Laboratory for Strength and Vibration of Mechanical Structures Shaanxi Engineering Research Center of Nondestructive Testing and Structural Integrity Evaluation Xi'an Jiaotong University Xi'an 710049 China;
2.Xinjiang Uygur Autonomous Region Inspection Institute of Special Equipment Urumqi 830011 China |
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Abstract Plastic deformation and fatigue damage, as the typical micro-damage caused by external loads such as earthquake and long-term process of liquid flow/stress, may seriously affect the material electromagnetic properties and shorten the structural lifespan. In this study, first, the test pieces suffering from plastic deformation and fatigue damage are fabricated using MTS testing machine, respectively. Second, the correlation between the electromagnetic properties of the material and the plastic deformation/fatigue damage is investigated for 304 austenitic stainless steel. Finally, the mechanism is discussed based on microstructure analysis. With the increase of plastic deformation, the conductivity of the material decreases due to micro-defects. While, with the increase of plastic deformation, the magnetic polarization of the material increases due to phase transformation of nonmagnetic austenitic phase to magnetic martensitic phase. Similar as the reason of plastic deformation, the fatigue damage also decreases the conductivity of the material and increases the magnetic polarization of the material.
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Received: 07 June 2017
Published: 27 July 2018
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| Fund:This work is supported by National Key R&D Program of China (2017YFF0209703), and the Natural Science Foundation of China (51407132, 51577139). |
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Corresponding Authors:
Chen Zhenmao male, born in 1964, Ph.D., Professor, Research interest: Mechanics and Nondestructive Evaluation.E-mail: chenzm@mail.xjtu.edu.cn
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2018, Vol. 33 
