کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1449631 988710 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of Mg on the structure and properties of Type 319 aluminum casting alloys
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
The effect of Mg on the structure and properties of Type 319 aluminum casting alloys
چکیده انگلیسی

The precipitation hardening behavior of a Type 319 aluminum alloy (Al–6.7 wt.% Si–3.75 wt.% Cu) with and without 0.45 wt.% Mg has been investigated. It is shown that both θ and Q phase exist in the as-cast samples and are dissolved during solution heat treatment. Subsequent artificial aging results in the precipitation of both the metastable θ′ phase typical of aged alloy 319 and, in the case of the Mg-containing alloy, an additional and extremely small phase, which was identified as Q′ based on previous literature. Both types of precipitates have been characterized using transmission electron microscopy (TEM) and three-dimensional atom probe (3DAP) tomography. The Mg-containing alloy exhibits higher strength and lower ductility, presumably due to both solid solution strengthening and the presence of the fine Q′ phase.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 57, Issue 4, February 2009, Pages 1308–1317
نویسندگان
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