Title

低碳钢扭转过程弱磁信号变化及金属磁记忆效应

Translated Titles

Change of Weak Magnetic Signals and Metal Magnetic Memory Effects during the Torsion of Low Carbon Steel

Authors

张卫民(Wei-Min Zhang);刘红光(Hong-Guang Liu);袁俊杰(Jun-Jie Yuan);孙海涛(Hai-Tao Sun)

Key Words

金属磁记忆 ; 磁记忆效应 ; 低碳钢 ; 微损伤 ; metal magnetic memory ; magnetic memory effect ; low carbon steel ; micro-damage

PublicationName

北京理工大學學報

Volume or Term/Year and Month of Publication

25卷11期(2005 / 11 / 01)

Page #

1003 - 1007

Content Language

簡體中文

Chinese Abstract

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。

English 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.

Topic Category 基礎與應用科學 > 基礎與應用科學綜合
工程學 > 工程學綜合