کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9796113 | 1514941 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dynamic strain aging: A coupled dislocation-Solute dynamic model
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Dynamic strain aging: A coupled dislocation-Solute dynamic model Dynamic strain aging: A coupled dislocation-Solute dynamic model](/preview/png/9796113.png)
چکیده انگلیسی
A model for dynamic strain aging is proposed. It is written as a local constitutive formulation but can easily be extended to account for spatial interactions. The model is obtained by embedding accepted 'slow' time scale formulations for dislocation dynamics and aging kinetics in a multiple time scales dynamic system. Dislocation and solute dynamics are coupled at the 'fast' time scale pertaining to dynamic aging. Features of jerky flow described by standard models such as the negative strain rate sensitivity of the flow stress and critical strains for the occurrence of the Portevin-Le Chatelier effect are retrieved. In addition, negative strain rate sensitivity of the threshold stress for instability is predicted.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 400â401, 25 July 2005, Pages 226-230
Journal: Materials Science and Engineering: A - Volumes 400â401, 25 July 2005, Pages 226-230
نویسندگان
C. Fressengeas, A.J. Beaudoin, M. Lebyodkin, L.P. Kubin, Y. Estrin,