کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6758416 511517 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High temperature thickness measurements of stainless steel and low carbon steel using electromagnetic acoustic transducers
ترجمه فارسی عنوان
اندازه گیری ضخامت دما بالا از فولاد ضد زنگ و فولاد کم کربن با استفاده از مبدل های صوتی الکترومغناطیسی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
Thickness measurements were made on steel pipe at high temperatures using a non-contact watercooled EMAT (electromagnetic acoustic transducer) and also a laser-EMAT system where a portable Nd:YAG laser with a fibre optic cable was used to generate ultrasound on a sample, and a water-cooled coil-wound EMAT used to detect ultrasound. The set-up was designed so that the laser was fired through a hole in the centre of the EMAT, and a low pass 5 MHz filter employed to reduce the plasma noise. Back wall reflections were clearly visible at temperatures up to 900 °C on stainless and ferromagnetic low carbon steel, enabling wall thickness to be measured, taking into account thermal expansion of the sample. The water-cooled EMAT system can measure wall thickness on ferromagnetic low carbon steel at temperatures up to the Curie point; here, ultrasound generation is dependent on the magnetic state of the steel.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NDT & E International - Volume 68, December 2014, Pages 73-77
نویسندگان
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