کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448382 988672 2010 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Solute clustering in Al–Cu–Mg alloys during the early stages of elevated temperature ageing
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Solute clustering in Al–Cu–Mg alloys during the early stages of elevated temperature ageing
چکیده انگلیسی

The evolution of atomistic-level nanostructure during the early stages of elevated temperature ageing of rapid hardening (RH) Al–Cu–Mg alloys has been characterised by a combination of atom probe tomography (APT), transmission electron microscopy (TEM) and positron annihilation spectroscopy (PAS). APT analysis confirms that significant dispersions of small solute clusters form during ageing for 60 s at 150 °C. No zone-like precipitate structures were observed by TEM and APT examinations. These small clusters are believed to be responsible for the RH effect. Careful quantitative APT analysis reveals that a high density of Cu–Mg clusters with high Mg:Cu ratio gives the most potent strengthening response. Positron annihilation measurements also show that Cu–Mg clusters provide additional sites for vacancy stabilisation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 58, Issue 15, September 2010, Pages 4923–4939
نویسندگان
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