کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10620416 | 988622 | 2011 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Boundaries and interfaces in ultrafine grain composites
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کلمات کلیدی
Electron energy loss spectroscopy - طیف سنجی از دست دادن انرژی الکترونHigh-resolution electron microscopy - میکروسکوپ الکترونی با وضوح بالاTransmission electron microscopy - میکروسکوپ الکترونی عبوریParticulate reinforced composites - کامپوزیت تقویت شده چسبMetal matrix composites - کامپوزیت ماتریکس فلزی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The present study was motivated by two questions. First, what are the characteristics of grain and phase boundaries in a nanostructured material containing multiple phases? Second, what is the influence of these interfaces on mechanical behavior? Accordingly, a three-constituent Al 5083/B4C ultrafine grain (UFG) composite, consisting of a coarse grain (CG) phase (1-2 μm), an UFG phase (100-200 nm) and B4C particles (â¼0.7 μm), was selected for study. Interest in this particular Al 5083/B4C system stems from its hierarchical architecture, which comprises multiple scales, as well as from a reported yield strength of 1145 MPa. The associated grain boundaries (GB) and interfaces were investigated by transmission electron microscopy (TEM), high-resolution TEM, energy dispersive X-ray spectroscopy and electron energy loss spectroscopy methods. The role of high/low-angle GB, equilibrium and non-equilibrium GB within and between the CG and UFG regions, twin boundaries, twist transition boundaries and impurity segregation at GB in strengthening mechanisms is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 59, Issue 19, November 2011, Pages 7206-7218
Journal: Acta Materialia - Volume 59, Issue 19, November 2011, Pages 7206-7218
نویسندگان
Y. Li, Z. Zhang, R. Vogt, J.M. Schoenung, E.J. Lavernia,