首页> 外文会议>International Cryogenic Materials Conference ― ICMC, Jul 16-20, 2001, Madison, Wisconsin >EFFECT OF A MAGNETIC FIELD ON CRACK LENGTH MEASUREMENT OF 9NI STEEL BY UNLOADING COMPLIANCE METHOD
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EFFECT OF A MAGNETIC FIELD ON CRACK LENGTH MEASUREMENT OF 9NI STEEL BY UNLOADING COMPLIANCE METHOD

机译:磁场对卸荷柔度法测量9NI钢裂纹长度的影响

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摘要

In the fracture toughness measurement of ferro-magnetic materials in high magnetic fields, it has not been clarified whether we can use the same formulas as ones used in a non-magnetic field. Therefore, it is necessary to understand the magnetic effect in the fracture toughness measurement of ferro-magnetic materials. As the first step, crack length was measured at 4 K by unloading compliance method in the testing of CT specimen of 9% nickel steel. The same formula was used in the magnetic field of 0 and 8 Tesla. They were compared with the length measured by optical fractography. The magnetic field had little effect on the crack length measurement by the unloading compliance method. The small amount of retained austenite in Q T heat-treated specimen did not exhibit a magnetic effect on the crack length measurement by the unloading compliance method.
机译:在强磁场下铁磁性材料的断裂韧性测量中,尚不清楚我们是否可以使用与非磁场中相同的公式。因此,有必要了解铁磁性材料的断裂韧性测定中的磁效应。第一步,在9%镍钢的CT试样测试中,通过卸载顺应性方法在4 K下测量裂纹长度。在0和8 Tesla的磁场中使用了相同的公式。将它们与通过光学分形术测量的长度进行比较。磁场对采用卸载柔量法测量的裂纹长度影响很小。 Q T热处理试样中残留的少量奥氏体对通过卸载顺应性法测量的裂纹长度没有显示出磁性影响。

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