کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5448102 | 1511770 | 2017 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Si-induced precipitation modification and related age-hardening response of an Al-4Mg-1Cu-0.5Si alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The solid solubility of Si in a quaternary Al-4Mg-1Cu-0.5Si (wt%) alloy has been found to be only about 0.061 at% at 520 °C, and 0.093 at% at 560 °C, less than 1/10 of that in the ternary Al-Mg-Si system. The excess Si in the alloy remains as coarse Mg2Si dispersoids which produce no significant age-hardening effect. Interestingly, a small change of Si content (from 0.061 at.% to 0.093 at.%) in the solid solution of the alloy has been found to be effective in modifying precipitation microstructure by promoting the formation of fine Guinier-Preston-Bagaryasky (GPB) zones and postponing the formation of the S phase during ageing at 200 °C. Consequently, the quaternary alloy exhibits an enhanced age-hardening response during earlier-stage ageing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 193, 1 June 2017, Pages 421-426
Journal: Materials Chemistry and Physics - Volume 193, 1 June 2017, Pages 421-426
نویسندگان
Chong Li, Gang Sha, Junhai Xia, Yongchang Liu, Simon P. Ringer,