کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5454803 | 1514365 | 2016 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Formation mechanisms of periodic longitudinal microstructure and texture patterns in friction stir welded magnesium AZ80
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Formation mechanisms of periodic longitudinal microstructure and texture patterns in friction stir welded magnesium AZ80 Formation mechanisms of periodic longitudinal microstructure and texture patterns in friction stir welded magnesium AZ80](/preview/png/5454803.png)
چکیده انگلیسی
Many studies of friction stir welding have shown that periodicity of metal flow around the tool pin may result in the formation of periodic differences in microstructure and texture in the weld nugget area correlated with the weld pitch. The current work investigates the periodicity of magnesium weld microtexture in the nugget region and its association with material flow using optical and electron microscopy. Two welds created in AZ80 at different processing conditions are presented in detail, one illustrating periodic longitudinal texture change, and one showing for the first time that periodic variations in texture, grain size, or composition are not defining features of periodic nugget flow. While nugget texture is dominated by shear deformation, it was found here to be affected to a lesser degree by compaction of material behind the welding tool, which led to reduction in intensity of the shear texture fiber. The decreased tendency for magnesium based alloys to form periodic patterns as compared to aluminum based alloys is explained with reference to the shear textures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 122, December 2016, Pages 22-29
Journal: Materials Characterization - Volume 122, December 2016, Pages 22-29
نویسندگان
J. Hiscocks, B.J. Diak, A.P. Gerlich, M.R. Daymond,