Analysis of minor hysteresis loops in plastically deformed low carbon steel
Analysis of minor hysteresis loops in plastically deformed low carbon steel
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DOI：
10.1063/1.1999853
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发表时间：
2005-08
影响因子：
3.2
通讯作者：
S. Takahashi;Le-fu Zhang;Satoru Kobayashi;Y. Kamada;H. Kikuchi;K. Ara
中科院分区：
文献类型：
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作者：
S. Takahashi;Le-fu Zhang;Satoru Kobayashi;Y. Kamada;H. Kikuchi;K. Ara
我们已经测量了随着磁场幅度Ha逐步增加而产生的微小磁滞回线，并结合变形低碳钢中的位错等晶格缺陷对其进行了分析。我们在小环中定义了几个磁参数：伪矫顽力 HC*、伪剩磁 MR*、伪矫顽力 χH* 下的伪磁化率、伪磁滞损耗 WF* 和伪剩磁功 WR*。我们发现了塑性变形前后赝磁特性之间的几个简单关系，即 MR*∕Ma*=9∕10 和 3∕5，以及 WR*∕WF*=1∕6 和 1∕8。这些关系是由于小循环的相似性造成的。从赝磁特性中获得了六个对晶格缺陷敏感且与 Ha 以及磁场无关的磁系数。这些系数是对裂纹开始前的退化进行无损评估的有效参数。小环法对于无损逃逸有几个优点...
We have measured minor hysteresis loops with increasing magnetic-field amplitude Ha step by step and have analyzed them in connection with lattice defects such as dislocations in deformed low carbon steel. We define several magnetic parameters in the minor loops: pseudocoercive force HC*, pseudoremanence MR*, pseudosusceptibility at pseudocoercive force χH*, pseudohysteresis loss WF*, and pseudoremanence work WR*. We find several simple relations between the pseudomagnetic properties, namely, MR*∕Ma*=9∕10 and 3∕5, and WR*∕WF*=1∕6 and 1∕8, before and after plastic deformation, respectively. These relations are due to the similarity of minor loops. Six magnetic coefficients that are sensitive to lattice defects and are independent of Ha, as well as of the magnetic field, are obtained from the pseudomagnetic properties. These coefficients are effective parameters for nondestructive evaluation of degradation before the initiation of cracking. The minor-loop method has several advantages for nondestructive eva...