کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5015155 | 1463729 | 2017 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Relation between crack growth behaviour and crack front morphology under hold-time conditions in DA Inconel 718
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Relation between crack growth behaviour and crack front morphology under hold-time conditions in DA Inconel 718 Relation between crack growth behaviour and crack front morphology under hold-time conditions in DA Inconel 718](/preview/png/5015155.png)
چکیده انگلیسی
The crack growth behaviour of Direct Aged Inconel 718 was studied at 550 °C. Experiments were carried out under pure fatigue cycles, hold-time cycles of different durations and a mix of both. Hold-time cycles were systematically associated with complex crack front morphologies. A new numerical approach was developed to assess the effect of crack front morphology on the direct current potential drop technique, mechanical fields at the crack tip and ultimately, measured crack growth rates. Using this approach, a clear relation was established between crack front morphology and its evolution, and the crack growth behaviour under hold-time conditions. Complex crack front morphologies are demonstrated to be responsible for increased crack growth rates. From this, a crack growth mechanism under hold-time conditions is proposed. Finally, the numerical framework here presented is to be considered as a new, easily reproducible, way to properly analyse experimental data when dealing with complex loading cycles and complex crack front morphologies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Fatigue - Volume 96, March 2017, Pages 17-27
Journal: International Journal of Fatigue - Volume 96, March 2017, Pages 17-27
نویسندگان
E. Fessler, E. Andrieu, V. Bonnand, V. Chiaruttini, S. Pierret,