Magnetic characterisation of grain size and precipitate distribution by major and minor BH loop measurements
Magnetic characterisation of grain size and precipitate distribution by major and minor BH loop measurements
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DOI：
10.1016/j.jmmm.2019.02.088
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发表时间：
2019-07-01
影响因子：
2.7
通讯作者：
Peyton，Anthony
中科院分区：
文献类型：
--
作者：
Liu，Jun;Wilson，John;Peyton，Anthony
晶粒尺寸和析出物对钢的机械性能有显著影响，并且期望能够以非破坏性方式消除这些影响。晶粒和析出物的尺寸和它们的空间分布在超低碳钢和实验室模型钢已分别不同，并与各种特征的磁性参数从主要和次要的磁化循环测量比较。这些磁性参数被证明是非常敏感的晶粒尺寸分布时，晶粒内没有沉淀物。然而，磁性参数表现出与沉淀物尺寸分布相关的复杂行为，这与有效钉扎的临界沉淀物尺寸和最强钉扎到畴壁的另一个临界沉淀物尺寸有关。讨论了晶粒尺寸和析出物分布对所研究钢的微环性能的影响。
Grain size and precipitates have a significant effect on the mechanical properties of steels and it is desirable to be able to characterise these in a non-destructive manner. Grain and precipitate sizes and their spatial distributions in both an extra-low-carbon steel and a laboratory model steel have been individually varied and compared with a variety of characteristic magnetic parameters measured from major and minor magnetisation loops. These magnetic parameters are shown to be very sensitive to grain size distribution when there are no precipitates within the grains. However, the magnetic parameters exhibit complex behaviours with precipitate size distribution, which is linked to a critical precipitate size for effective pinning and another critical precipitate size for strongest pinning to domain walls. The interaction between grain size and precipitate distribution effects on the minor loop properties in the studied steels are discussed.