Research on magnetic testing method of stress distribution  被引量:3

Research on magnetic testing method of stress distribution

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作  者:李路明 黄松岭 汪来富 杨海青 施克仁 

出  处:《中国有色金属学会会刊:英文版》2002年第3期388-391,共4页Transactions of Nonferrous Metals Society of China

基  金:Project(5 0 0 0 10 0 6)supportedbytheNationalNaturalScienceFoundationofChina

摘  要:For implementing nondestructive evaluation of stress distribution inside ferromagnetic material, a magnetic testing method was developed which does not need artificial magnetizing field. This method was implemented by testing the normal component of the magnetic flux leakage above the object being tested with a constant lift off from 1 to 10?mm. The distribution of the stress inside the specimen can be gotten from that of the normal component of the magnetic flux leakage. A stress concentration specimen, which is a 10?mm thickness mild steel plate with a welding seam on it, was tested using this method. The stress distribution of the magnetic testing was identical with that of small hole stress testing method. It indicates that the stress distribution of ferromagnetic material can be known by the magnetic testing method.For implementing nondestructive evaluation of stress distribution inside ferromagnetic material, a magnetic testing method was developed which does not need artificial magnetizing field. This method was implemented by testing the normal component of the magnetic flux leakage above the object being tested with a constant lift off from 1 to 10?mm. The distribution of the stress inside the specimen can be gotten from that of the normal component of the magnetic flux leakage. A stress concentration specimen, which is a 10?mm thickness mild steel plate with a welding seam on it, was tested using this method. The stress distribution of the magnetic testing was identical with that of small hole stress testing method. It indicates that the stress distribution of ferromagnetic material can be known by the magnetic testing method.

关 键 词:磁性检验 无损检验 压力分布 焊缝 

分 类 号:TG115[金属学及工艺—物理冶金]

 

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