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Study on magnetic memory signals of medium carbon steel specimens with surface crack precut during loading process 被引量:9
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作者 DONG Lihong XU Binshi DONG Shiyun YE Minghui CHEN Qunzhi 《Rare Metals》 SCIE EI CAS CSCD 2006年第z1期431-435,共5页
Static tensile test and tensile-tensile fatigue test of medium carbon steel sheet specimens with surface crack precut were performed on MTS810 hydraulic testing machine to clear the meaning of the point of Hp(y) value... Static tensile test and tensile-tensile fatigue test of medium carbon steel sheet specimens with surface crack precut were performed on MTS810 hydraulic testing machine to clear the meaning of the point of Hp(y) value zero. Magnetic memory signals were measured during the test process. The results show that only one point of Hp(y) zero value exists in all measured magnetic signal curves during the loading process, which should be a sign of intersection of positive-negative magnetic poles after magnetic ordered state appears and does not indicate the position of surface crack precut. The analysis shows that the surface crack precut can not interrupt the magnetic ordered state occurred during the test completely, hence its Hp(y) value is not zero. However, the crack extending to a penetrated defect at the instant of specimen′s fracture leads to the discontinuance of magnetic ordered state. 展开更多
关键词 metal magnetic memory ferromagnetic materials surface crack precut Hp(y) zero value magnetic ordered state
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