Q235钢静拉伸时的磁记忆效应  

Magnetic Memory Effect of Q235 Steel Under Static Tension Condition

作　　者：李晓萌[1] 吕可非[1] 李歌天[1] 丁红胜[1] 白世武[2] 

机构地区：[1]北京科技大学物理系,北京100083 [2]中国石油天然气管道科学研究院,河北廊坊065000

出　　处：《物理测试》2013年第5期10-13,共4页Physics Examination and Testing

基　　金：国家自然科学基金资助项目(61072082);中央高校基础科研业务费资助项目(FRF-BR-09-005A)

摘　　要：基于磁记忆检测方法,研究Q235钢静拉伸试验在不同因素下应力集中程度与磁记忆信号之间的规律,观察试件在不同应力状态下局部磁畴组织结构的变化。结果表明:试件在强化范围内,圆孔周边磁记忆信号随应力集中程度及孔径的增加而增大。从弹性到强化阶段,磁畴分布逐渐密集,磁畴宽度变小,数量增多。该研究结果可为探讨铁磁性材料的力-磁效应提供试验依据,并为后续深入的定量化研究奠定基础。Based on the metal magnetic memory testing （MMMT）, the relationship between the magnetic memory signals and the stress concentration degree for Q235 steels static tensile test under different conditions are investiga- ted. Then the magnetic domains at different points with various stresses on the sample are observed. The results show that from elastic stage to enhancement stage the amplitude of magnetic memory signals increases as the stress concentration and diameter of hole increases, magnetic domain distribution becomes intensive gradually, the width of magnetic domain becomes smaller, and the number increases. This study would provide experimental basis for the investigation of stress-magnetic effect on ferromagnetic material, which can be a reference for further quantitative research.

关 键 词：金属磁记忆 应力集中 磁畴 力-磁效应 

分 类 号：TM271[一般工业技术—材料科学与工程]