| 张冰琦,雷经发,邬竞雄,刘涛.不同拉伸损伤状态下45钢表面磁畴观测[J].安徽建筑大学学报,2021,29(1):73-77 |
| 不同拉伸损伤状态下45钢表面磁畴观测 |
| Observation of Magnetic Domains on the Surface of 45 Steel under Different Tensile Damage States |
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| DOI： |
| 中文关键词: 拉伸损伤 金相组织 磁畴观测 |
| 英文关键词: tensile damage metallographic structure magnetic domain observation |
| 基金项目:国家自然科学基金项目（51165020，51565029） |
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| 中文摘要: |
| 为明确铁磁材料在拉伸损伤过程中磁特征变化规律，以 45 钢试样为对象开展准静态拉伸实验。选用
粉纹法进行不同拉伸损伤状态下 45 钢试样的磁畴观测。实验结果表明：45 钢退火试样金相组织中含有珠光体
和铁素体。在未施加载荷时，其表面的微观磁畴结构排列无序、分布较为杂乱。随着拉伸的进行，45 钢试样
磁畴组织由 180°畴、点状畴等形态转变为迷宫畴、90°畴，拉应力的增加破坏了系统局部能量平衡，使得磁
畴间距逐渐变大，畴壁宽度逐渐变小。 |
| 英文摘要: |
| In order to clarify the variation of magnetic characteristics of ferromagnetic materials in the process of tensile damage，
quasi-static tensile tests were carried out on 45 steel samples. The powder-pattern method was applied to observe the magnetic domain
of 45 steel samples under different tensile damage states. The results show that the metallographic structure of annealed 45 steel samples
contains pearlite and ferrite. When no load is applied，the micro domain structure is disorderly arranged and distributed randomly. With
the continuous implementation of tensile test，the magnetic domain structure of 45 steel sample changes from 180°domain and dotted
domain to labyrinth domain and 90°domain. The increase of tensile stress destroys the energy balance of the system，which makes the
domain spacing become larger and the domain wall width smaller. |
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