Development of the New Nondestructive Material Degradation Evaluation Method Using the Low Frequency Excitation Magnetic Sensor Under the DC Magnetic Field

直流磁场下低频励磁磁传感器无损材料降解评价新方法的研制

• 批准号: 23560518
• 负责人: OKA Mohachiro
• 金额: $ 3万
• 依托单位: Oita National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560518/
• 关键词: 疲労破壊; 疲労; 磁気センサ; 渦電流法; 直流磁界; 鉄系構造材; 非破壊検査

In the fatigue evaluation of an iron-based structural material, the inductance method that uses a pancake-type coil is reported to be effective. This method cannot evaluate the inside fatigue of a specimen because the eddy current does not penetrate into the inside of a specimen through the skin effect. In this method, the accuracy of the fatigue evaluation depends on the surface condition of a specimen. In this study we applied pulsating tension fatigue. We achieved the following results. The detection of pulsating tension fatigue of specimens made of low carbon steel was originally possible by the inductance method which used 10kHz as a excitation frequency. We attempted the improvement of the sensibility using the inductance method excited in the low frequency together with the dc magnetization method that used Nd magnets. This method could evaluate pulsating tension fatigue of a specimen irrespective of the surface condition.

据报道，在铁基结构材料的疲劳评估中，使用薄饼型线圈的电感法是有效的。该方法无法评价试件的内部疲劳，因为涡流不会通过集肤效应渗透到试件内部。在该方法中，疲劳评估的准确性取决于样本的表面状况。在这项研究中，我们应用了脉动张力疲劳。我们取得了以下成果。低碳钢试件的脉动拉伸疲劳检测最初是通过采用10kHz作为激励频率的电感法实现的。我们尝试使用低频激励的电感方法和使用 Nd 磁铁的直流磁化方法来提高灵敏度。该方法可以评估样品的脉动拉伸疲劳，无论表面状况如何。

项目成果

磁気的手法によるオーステナイトステンレス（SUS316L）の片振引張疲労評価

磁力法评估奥氏体不锈钢（SUS316L）的振动拉伸疲劳

• 作者: 岡茂八郎;薬師寺輝敏;榎園正人
• 通讯作者: 榎園正人

Fatigue Evaluation of the Iron-Based Structural Material (SUS430) by the Eddy Current Sensor under the DC Magnetic Field

直流磁场下涡流传感器对铁基结构材料（SUS430）的疲劳评估

• 作者: Takaaki Komiya;Mohachiro Oka;Terutoshi Yakushiji;Masato Enokizono
• 通讯作者: Masato Enokizono

Examination of the Inductance Method for Non-Destructive Testing in Structural Metallic Material by Means of the Pancake-type Coil

薄饼式线圈无损检测金属结构材料电感法的检验

• 发表时间: 2013
• 期刊: Journal of the Japan Society of Applied Electromagnetics and Mechanics
• 作者: Mohachiro OKA;Terutoshi YAKUSHIJI,Yuji TSUCHIDA;Masato ENOKIZONO
• 通讯作者: Masato ENOKIZONO

Fatigue Evaluation of Low Carbon Steel by Means of the Inductance Method Using a Pancake-Type Coil

薄饼式线圈电感法评价低碳钢的疲劳

• 发表时间: 2012
• 期刊: Journal of the Japan Society of Applied Electromagnetics and Mechanics
• 作者: M. Oka;T. Yakushiji;Y. Tsuchida;and M. Enokizono
• 通讯作者: and M. Enokizono