کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7132769 | 1461726 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mold-free fs laser shock micro forming and its plastic deformation mechanism
ترجمه فارسی عنوان
شش لیزر تسمه نقرهای بدون قالب بدون میکرو تشکیل و مکانیزم تغییر شکل پلاستیک
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کلمات کلیدی
لیزر فموستیک ایجاد شوک لیزری، تشکیل قالب بدون قالب، تغییر شکل پلاستیک فویل فلزی،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی برق و الکترونیک
چکیده انگلیسی
Mold-free micro forming using a fs laser was investigated by producing micro pits on pure aluminum foil. The characteristics of the pit profiles, their forming mechanisms, and the influences of some important parameters on the pit profiles were investigated by measuring the profiles and the surface morphologies of the pits. The microstructures of the shocked aluminum foil were observed through transmission electron microscopy (TEM). Pits obtained through fs laser shock forming are composed of two regions: the directly impacted region and the plastically bending region. Diameters of the former strongly depend on laser beam sizes. The plastically bending region has a negative effect on forming precision. Shorter laser pulse width is beneficial for narrowing the range of the plastically bending region and enhancing the forming precision. Using a single-side clamping mode can also narrow the plastically bending region through buffering the local bending. Fs laser-induced microstructures are characteristic of fragmentary short dislocation lines and parallel slip lines, which are the results of the ultrafast and ultrahigh pressure loading. The localization of the fs laser shock forming induced by ultrafast loading can enhance the precision of mold-free forming.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 67, April 2015, Pages 74-82
Journal: Optics and Lasers in Engineering - Volume 67, April 2015, Pages 74-82
نویسندگان
Yunxia Ye, Yayun Feng, Zuchang Lian, Yinqun Hua,