电工技术学报  2018, Vol. 33 Issue (14): 3170-3176    DOI: 10.19595/j.cnki.1000-6753.tces.170809
电工材料 |
塑性变形和疲劳对304不锈钢电磁属性的影响研究及微观结构分析
解社娟1, 2, 吴磊1, 仝宗飞1, 杨庆宁1, 陈振茂1, 朱光艺2, 李鹏2
1. 机械结构强度与振动国家重点实验室 陕西省无损检测与结构完整性评价工程技术研究中心西安交通大学 西安 710049;
2. 新疆维吾尔自治区特种设备检验研究院 乌鲁木齐 830011
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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摘要 材料在地震和和长期的流体作用力/应力等外部环境力作用下,极易产生塑性变形和疲劳损伤等典型的微观损伤,这些微观损伤会严重影响材料的电磁属性并缩短结构的使用寿命。本文首先利用MTS试验机分别制作了塑性变形试件和疲劳试件;其次,研究了304奥氏体不锈钢的电磁属性与其塑性变形和疲劳损伤之间的关系;最后,根据微观结构分析讨论了其作用机理。研究发现,随着塑性变形的增加,材料的电导率下降,这归因于材料内部的微观缺陷的产生;随着塑性变形的增加,材料的磁极化强度上升,这归因于材料的非磁性奥氏体相到磁性马氏体相的相变。研究还发现,与塑性变形类似,疲劳损伤也会降低材料的电导率,提高材料的磁极化强度。
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解社娟
吴磊
仝宗飞
杨庆宁
陈振茂
朱光艺
李鹏
关键词 304奥氏体不锈钢塑性变形疲劳损伤电导率磁导率微观结构    
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.
Key words304 austenitic stainless steel    plastic deformation    fatigue damage    conductivity    magnetic permeability    microstructure   
收稿日期: 2017-06-07      出版日期: 2018-07-27
PACS: TM213  
作者简介: Xie Shejuan female, born in 1983, Ph.D., Associate Professor, Research interest: Mechanics and Nondestructive Evaluation.E-mail: xiesj2014@mail.xjtu.edu.cn
引用本文:   
解社娟, 吴磊, 仝宗飞, 杨庆宁, 陈振茂, 朱光艺, 李鹏. 塑性变形和疲劳对304不锈钢电磁属性的影响研究及微观结构分析[J]. 电工技术学报, 2018, 33(14): 3170-3176. Xie Shejuan, Wu Lei, Tong Zongfei, Yang Qingning, Chen Zhenmao, Zhu Guangyi, Li Peng. Investigation of Electromagnetic Properties of 304 Austenitic Stainless Steel with Plastic Deformation and Fatigue Damage and Microstructure Analysis. Transactions of China Electrotechnical Society, 2018, 33(14): 3170-3176.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.170809          https://dgjsxb.ces-transaction.com/CN/Y2018/V33/I14/3170