摘要
针对34CrMo4钢弧状试件表面法向磁场强度Hp(y)和磁场梯度的绝对值|k|随拉应力σ的变化规律进行了试验。结果表明:当拉应力低于屈服强度时,Hp(y)分布范围及|k|值均随σ的增加而增大;加载至接近屈服强度时,两者达到饱和。进入塑性变形阶段后,Hp(y)分布范围及|k|值下降明显,并对这一现象进行了解释。
The variation of magnetic field intensity Hp（y） and the absolute value of magnetic gradient ｜k｜ with tensile stress of 34CrMo4 steel were studied during tensile testing. It was found both Hp （y） and ｜k｜ increased with the increase of a in the elastic stage, and reached the maximum values closing to yielding stress. However, Hp （y） and ｜k｜ decreased abruptly in the plastic stage, which was explained in detail in the paper.
出处
《无损检测》
2013年第8期1-3,13,共4页
Nondestructive Testing
基金
国家科技部863资助项目(2012AA040103)
关键词
34CrMo4
金属磁记忆
拉伸
磁场强度
磁场梯度
34CrMo4
Magnetic memory testing
Tension
Magnetic field intensity
Magnetic field gradient
