کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5350914 | 1503638 | 2015 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characteristics of plasma plume in fiber laser welding of aluminum alloy
ترجمه فارسی عنوان
ویژگی های پلاسما در جوشکاری لیزر جوشکاری آلیاژ آلومینیوم
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کلمات کلیدی
جوش لیزری، آلیاژ آلومینیوم، پلاسما، اثر محافظتی، طیف سنجی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
To understand the laser-matter interaction in fiber laser welding of aluminum alloys, the effects of laser power on the characteristics of fiber laser induced plasma plume were studied by emission spectroscopic analysis firstly. The plasma characteristic parameters including electron temperature, electron density, ionization degree, and inverse bremsstrahlung linear absorption coefficient were computed according to the spectral data. It was found that the laser power of 5Â kW is a turning point. After the laser power reaches 5Â kW, the plume changes from a metal vapor dominated weakly ionized plasma to a strongly ionized plasma. The corresponding phenomena are the dramatic increase of the value of characteristic parameters and the appearance of strong plasma shielding effect. The calculation of effective laser power density demonstrated that the plasma shielding effect is dominated by inverse bremsstrahlung absorption. The finding suggested the plasma shielding effect must be considered in fiber laser welding of aluminum alloys, rather than is ignored as claimed in previous view.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 326, 30 January 2015, Pages 181-186
Journal: Applied Surface Science - Volume 326, 30 January 2015, Pages 181-186
نویسندگان
Ming Gao, Cong Chen, Ming Hu, Lianbo Guo, Zemin Wang, Xiaoyan Zeng,