کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7172098 1463762 2015 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dislocation-based interpretation on the effect of the loading frequency on the fatigue properties of JIS S15C low carbon steel
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Dislocation-based interpretation on the effect of the loading frequency on the fatigue properties of JIS S15C low carbon steel
چکیده انگلیسی
In this work, the former experimental results were reintroduced and new discussions were developed by performing additional experiments and analyses paying an attention to microstructure and dislocation structure. Thus, it was found that the loading frequency effect at ultrasonic frequency is due to a particular behavior of B.C.C. ferrite under high strain rate. Such a behavior causes strain inhomogeneities at grain boundaries, and then facilitates the intergranular crack initiation mode rather than the usual intragranular one often reported at lower loading frequencies. Longer ultrasonic fatigue lives at ultrasonic frequency are directly related to this transition of the crack initiation mode. In addition, effects of the pearlitic volume fraction on the fatigue behavior have been also discussed in the present work.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Fatigue - Volume 70, January 2015, Pages 328-341
نویسندگان
, , , , , ,