کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448969 988688 2008 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Initiation and growth of damage in a dual-phase steel observed by X-ray microtomography
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Initiation and growth of damage in a dual-phase steel observed by X-ray microtomography
چکیده انگلیسی

In situ tensile tests have been carried out on a high-strength, dual-phase steel. These experiments show that it is possible to follow and quantify the evolution of damage nondestructively and in three dimensions in this type of material. The measurements were analyzed in terms of density, size, aspect ratio of the cavities but also of the local deformation and the stress triaxiality in the sample. It was found that damage initiation is progressive with the applied tensile strain and that the initiation of new small cavities reduces the average diameter while the growth of the previously created ones increases the average diameter. This information was used to develop a new model for void growth based on the classical Rice and Tracey approach. This simple approach was modified to account for progressive damage initiation. The results of the proposed model are in good agreement with the measurements.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 56, Issue 18, October 2008, Pages 4954–4964
نویسندگان
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