تقرير
Significance of Strain Rate in Severe Plastic Deformation on Steady-State Microstructure and Strength
| العنوان: | Significance of Strain Rate in Severe Plastic Deformation on Steady-State Microstructure and Strength |
|---|---|
| المؤلفون: | Edalati, Kaveh, Wang, Qing, Enikeev, Nariman A., Peters, Laura-Jean, Zehetbauer, Michael J., Schafler, Erhard |
| المصدر: | Materials Science and Engineering A, Vol. 859, p. 144231, 2022 |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | The microstructure and mechanical properties of materials saturate to steady states after severe plastic deformation (SPD). Despite the well-known effect of temperature on the steady-state microstructure, there is no general agreement on the significance of strain rate and the applicability of the Zener-Hollomon parameter in this regard. In this study, several pure metals (aluminum, copper, titanium, and iron) and a Cu-30Zn (wt%) brass alloy have been processed by a high-speed high-pressure torsion (HPT) equipment with controllable rotation speeds in the range of 0.06 to 60 rpm. It is found that crystallite/grain size, dislocation density, microhardness and shear stress at the steady state are reasonably rate-independent for the von Mises strain rates in the range of 0.004 to 20 s-1. Because both rates of grain refinement and of dynamic recrystallization are proportional to the strain rate, it is suggested that their balance, which determines the steady state, is rate-independent. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.msea.2022.144231 |
| URL الوصول: | http://arxiv.org/abs/2301.02805 |
| رقم الأكسشن: | edsarx.2301.02805 |
| قاعدة البيانات: | arXiv |
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