| 低碳钢扭转过程弱磁信号变化及金属磁记忆效应 |
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| 引用本文： | 张卫民,刘红光,袁俊杰,孙海涛.低碳钢扭转过程弱磁信号变化及金属磁记忆效应[J].北京理工大学学报,2005,25(11):1003-1007. |
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| 作者姓名： | 张卫民 刘红光 袁俊杰 孙海涛 |
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| 作者单位： | 北京理工大学,机械与车辆工程学院,北京,100081;北京理工大学,材料科学与工程学院,北京,100081 |
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| 基金项目： | 中国科学院资助项目
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北京市重点学科建设项目 |
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| 摘 要： | 研究地磁场存在条件下扭转过程中低碳A3钢的弱磁信号变化和金属磁记忆效应.在扭转实验机上对A3钢弱磁信号变化和转矩变化之间的关系进行了实验研究,通过记录试件表面磁场强度垂直分量和所施加的转矩值,绘制出二者之间的关系曲线,分析了弹塑性阶段弱磁信号变化特点.磁信号在弹塑性区域发生变化的主要原因是磁畴在应力作用下的定向分布和位错对磁畴转向的阻碍作用.根据实验结果提出了通过设立弱磁信号的梯度阈值进行构件应力状态及微损伤判别的新方法.
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| 关 键 词： | 金属磁记忆 磁记忆效应 低碳钢 微损伤 |
| 文章编号： | 1001-0645(2005)11-1003-05 |
| 收稿时间： | 12 27 2004 12:00AM |
| 修稿时间： | 2004年12月27日 |
Change of Weak Magnetic Signals and Metal Magnetic Memory Effects During the Torsion of Low Carbon Steel |
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| ZHANG Wei-min,LIU Hong-guang,YUAN Jun-jie and SUN Hai-tao.Change of Weak Magnetic Signals and Metal Magnetic Memory Effects During the Torsion of Low Carbon Steel[J].Journal of Beijing Institute of Technology(Natural Science Edition),2005,25(11):1003-1007. |
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| Authors: | ZHANG Wei-min LIU Hong-guang YUAN Jun-jie and SUN Hai-tao |
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| Institution: | 1. School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China; 2. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | Changes in weak magnetic signal and metal magnetic memory effects in low carbon A3 steel during torsion are studied.Relationship between signal change and torsion change is studied on a torsion testing equipment.The relationship is presented by recording the vertical component of magnetic intensity on the sample surface and the loading moment of torsion,and the characteristics and reason of these changes are analyzed.The main reason of change in magnetic signal is the directional distribution of the magnetic domain on the stress and the impediment by the dislocation to the domain's turn.A new weak magnetic method of estimating the stress state and micro-damage of component is thus proposed. |
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| Keywords: | metal magnetic memory magnetic memory effect low carbon steel micro-damage |
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