| کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
|---|---|---|---|---|
| 828501 | 1470299 | 2015 | 8 صفحه PDF | دانلود رایگان |
کلمات کلیدی
1-مقدمه
2-روش تحلیلهای جزء محدود
3-نتایج و بحث
3-1 فرآیندهای SSE و TE مجزا
3-2 فرآیند متوالی SSE و TE
4-نتیجهگیری
• A tandem process of the simple shear extrusion and twist extrusion was proposed.
• Deformation heterogeneity was investigated using the finite element method.
• The tandem process produces more homogeneous and larger deformation than extrusion.
Recently, simple shear extrusion (SSE) and twist extrusion (TE) are introduced to fabricate ultrafine grained bulk rod metallic materials. The SSE and TE processes generate significant deformation inhomogeneity, with higher and lower strains in the center, respectively, which easily causes mechanical instability of the materials. In this study, to overcome this deformation inhomogeneity problem in SSE and TE, a tandem process of SSE and TE (TST) is suggested. The finite element method is applied for plastic deformation behavior during the TST process. The results demonstrate that the TST process can produce relatively homogeneously deformed materials. In particular, the effects of back pressure and processing order on the plastic deformation behaviors in the TST process are systematically analyzed.
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Journal: Materials & Design - Volume 83, 15 October 2015, Pages 858–865