کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7981214 | 1514743 | 2014 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Friction-stir welding of an Al-Mg-Sc-Zr alloy in as-fabricated and work-hardened conditions
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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: Friction-stir welding of an Al-Mg-Sc-Zr alloy in as-fabricated and work-hardened conditions Friction-stir welding of an Al-Mg-Sc-Zr alloy in as-fabricated and work-hardened conditions](/preview/png/7981214.png)
چکیده انگلیسی
The effect of prior work hardening on the microstructure and mechanical properties of a friction-stir welded (FSWed) Al-5.4Mg-0.2Sc-0.1Zr alloy was investigated. The microstructure of the final stir zone was shown to be weakly dependent on the initial condition of the base material; FSW led to the formation of fully recrystallized microstructures with average grain sizes ranging from 1.2 to 1.5 μm and a moderate dislocation density of ~3.5±1.5Ã1013 mâ2 in the stir zone. The nano-scale Al3(Sc,Zr) dispersoids coarsened from 9 to ~15 nm but retained a coherent relationship with the matrix. In contrast, the joint efficiency of the obtained welds was very sensitive to the initial material condition. Nearly full strength joints were obtained in both annealed (O) and partially hardened and stabilized (H323) conditions. However, the joint efficiency was only 65% in the fully hardened condition (H18). The relatively low weld strength for the alloy in the H18 condition was attributed to the elimination of dislocation and substructure strengthening during FSW.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 600, 10 April 2014, Pages 159-170
Journal: Materials Science and Engineering: A - Volume 600, 10 April 2014, Pages 159-170
نویسندگان
S. Malopheyev, V. Kulitskiy, S. Mironov, D. Zhemchuzhnikova, R. Kaibyshev,