کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1575989 | 1514761 | 2013 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Grain size and workpiece dimension effects on material flow in an open-die micro-forging/extrusion process
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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: Grain size and workpiece dimension effects on material flow in an open-die micro-forging/extrusion process Grain size and workpiece dimension effects on material flow in an open-die micro-forging/extrusion process](/preview/png/1575989.png)
چکیده انگلیسی
The interactive effect of grain size and specimen dimensions on the material flow and microstructural evolution was studied in a progressive open-die microforming process. Particular interest was paid on the effect of the number of grains over the initial specimen thickness, on the evolution of the dead metal zone (DMZ) in the final micro-component's microstructure. Such a DMZ is deemed unfavorable for mechanical properties of the pin. Interestingly, experimental results revealed that the DMZ can be removed at the pin surface by increasing the initial grain size. This behavior was attributed to the role of the strain gradient on the deformation. In the aspects of the forming load and dimensional measurements of the final parts, there were no significant size-effects observed in this process. This is because the neutral plane, which demarcates the two directions of material flow in the open-die forging/extrusion process, determines the amount of material flow towards the die orifice, regardless of the initial grain size.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 582, 10 October 2013, Pages 379-388
Journal: Materials Science and Engineering: A - Volume 582, 10 October 2013, Pages 379-388
نویسندگان
Ehsan Ghassemali, Ming-Jen Tan, Chua Beng Wah, Anders E.W. Jarfors, S.C.V. Lim,