Diagnosis of austenitic steel valves with the magneto-optical method

P. Novotny; P. Machac; M. Kucera; K. Nitsch; B. Skrbek

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Diagnosis of austenitic steel valves with the magneto-optical method

机译：磁光法诊断奥氏体钢阀

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Samples selected from damaged austenitic steel valves of diesel engines have been examined using the magneto-optical (MO) method. The method uses a magnetic excitation normal to the material surface and enables the assessment of two conditions of the originally nonmagnetic austenitic steel, namely an integral one, when the coercivity H_c is measured, and a local one that concentrates on the detection and assessment of individual defects. The results have shown that the operational load increases H_c of these materials and a defect of the fatigue crack type has been detected in the position of the valve failure.

机译：使用磁光（MO）方法检查了从损坏的柴油发动机奥氏体钢阀中选取的样品。该方法使用垂直于材料表面的磁激励，并且能够评估原始非磁性奥氏体钢的两个条件，即测量矫顽力H_c时的积分条件和专注于检测和评估个体的局部条件。缺陷。结果表明，这些材料的操作负荷增加了H_c，并且在阀故障的位置已检测到疲劳裂纹类型的缺陷。

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来源
《NDT & E international》 |2007年第3期|p.203-207|共5页
作者
P. Novotny; P. Machac; M. Kucera; K. Nitsch; B. Skrbek;
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作者单位

Institute of Chemical Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类工业通用技术与设备;金属的分析试验（金属材料试验）;
关键词
austenitic materials; magneto-optics; non-destructive testing; metallography;

机译：奥氏体材料;磁光;无损检测;金相;

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1. STANDARDIZATION OF CONTROL OF THE CONTENT OF FERRITE PHASE IN CHROMIUM-NICKEL AUSTENITIC AND AUSTENITIC-FERRITIC STEELS BY MAGNETIC METHOD [J] . P. E. Merinov, A. E. Korneev, N. S. Tsikunov Metal Science and Heat Treatment . 2006,第7a8期

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2. On the hot strength of austenitic valve steels with a high nitrogen content [J] . H. Berns, C. escher, V. G. gavriljuk Materialwissenschaft und Werkstofftechnik . 2000,第4期

机译：高氮含量奥氏体阀钢的热强度
3. Corrosion, galling and wear testing of duplex and austenitic stainless steels for seawater valve applications [J] . R.M.Kain, L.S.Marshall Stainless steel world . 2000,第10期

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4. Comparison of Different Methods of Residual Stress Determination of Cold-Rolled Austenitic-Ferritic, Austenitic and Ferritic Steels [C] . CAPEK Jiri, TROJAN Karel, NEMECEK Jakub European Conference on Residual Stresses . 2018

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5. Cold Work Level Analysis and Evaluation of Characterization Methods in Austenitic Stainless Steel for Stress Corrosion Cracking Applications [D] . Smith, Helen Christina 2015

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8. Manufacture of Alumina-Forming Austenitic Stainless Steel Alloys by Conventional Casting and Hot-Working Methods [R] . Brady, M. P., Yamamoto, Y., Magee, J. H. 2009

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Diagnosis of austenitic steel valves with the magneto-optical method

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