弹塑性变形对钢中磁巴克豪森噪声响应的影响  

Effects of Elastic-Plastic Deformation on Magnetic Barkhausen Noise Response in Steels

作　　者：牛亚平 沈正祥 蔡鹏辉 李斌彬 陈虎 余志远 徐佳敏 谭继东[4] NIU Ya-ping;SHEN Zheng-xiang;CAI Peng-hui;LI Bin-bin;CHEN Hu;YU Zhi-yuan;XU Jia-min;TAN Ji-dong(Ningbo Key Laboratory of Intelligent Inspection and Monitoring of Special Equipment,Ningbo Special Equipment Inspection&Research Institute;School of Materials Science and Engineering,Shanghai Jiaotong University;College of Quality&Safety Engineering,China Jiliang University;AQSIQ Key Laboratory ofNondestructive Testing and Evaluation,China Special Equipment Inspection and Research Institute)

机构地区：[1]宁波市特种设备检验研究院、宁波市特种设备智能检验与监测重点实验室 [2]上海交通大学材料科学与工程学院 [3]中国计量大学质量与安全工程学院 [4]中国特种设备检测研究院、国家质量监督检验检疫总局无损检测与评价重点实验室

出　　处：《化工机械》2024年第1期19-27,共9页Chemical Engineering & Machinery

基　　金：宁波市公益性科技计划(批准号:2021S192)资助的课题;浙江省市场监督管理局雏鹰计划培育项目(批准号:CY2022349)资助的课题;浙江省基础公益研究计划(批准号:LGF21E040003)资助的课题。

摘　　要：针对弹塑性行为对铁磁材料磁巴克豪森噪声(MBN)效应的影响,基于准静态单轴拉伸试验,对比研究了3种典型碳钢弹塑性阶段的应力-应变关系与MBN特征值之间的关联性,并对材料损伤位置进行了快速MBN表征。试验结果表明:含碳量对MBN信号具有较大影响,随着拉伸应力增加,MBN信号显著增强,在弹性临界点达到峰值形成饱和;进入塑性变形阶段后,MBN信号变化平缓但总体下降,固溶强化可进一步提高磁畴壁运动阻力,导致MBN信号降低更快直至断裂;应力卸载后,试样表面MBN特征值最低位置与断裂部位基本一致。Aiming at the effects of elastic-plastic behaviors on the magnetic Barkhausen noise(MBN)signals,having quasi-static uniaxial tensile tests based to comparatively investigate the correlations between stress-strain relationship and MBN emission in three typical carbon steels was implemented,including characterizing the material damage.The results show that,the carbon content has a great influence on the MBN signals.With the increasing of tensile stress,the MBN signals become significantly increased and reach a peak value and get saturated in the elastic region.In the plastic deformation region,the MBN signals’change is flat but decline overall and the solid solution strengthening can further increase the resistance of the magnetic domain wall motion,and result in the MBN signals decreasing faster until breaks.After the stress unloading,the lowest MBN signal on the sample surface complies with the fracture position basically.

关 键 词：碳钢 铁磁材料 MBN特征值 弹塑性变形 断面形貌 

分 类 号：TQ050.41[化学工程]