کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
295182 511530 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fatigue crack monitoring in engine-grade titanium alloy by dynamic subtraction of surface acoustic wavemodulation
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Fatigue crack monitoring in engine-grade titanium alloy by dynamic subtraction of surface acoustic wavemodulation
چکیده انگلیسی

The initiation and evolution of fatigue cracks in forged titanium alloy samples are monitored ultrasonically during fatigue testing. An in-situ surface wave acoustic method is applied during fatigue with an overlaid small low-frequency periodic loading, resulting in a nonlinear modulation of reflected ultrasonic pulses. The acoustic wave time traces in the sample are collected for a range of applied fatigue and modulation load levels and for a range of spatial propagation positions within each fatigue cycle. These samples are characterised by strong microstructure-induced ultrasonic scattering. To improve the signal-to-noise ratio a post-processing subtraction technique is introduced with the aim of enhancing initiated crack detectability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NDT & E International - Volume 55, April 2013, Pages 47–56
نویسندگان
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