کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1450255 988728 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
New iron–aluminium alloy with thermally stable coherent intermetallic nanoprecipitates for enhanced high-temperature creep strength
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
New iron–aluminium alloy with thermally stable coherent intermetallic nanoprecipitates for enhanced high-temperature creep strength
چکیده انگلیسی

Poor ductility and strength at high temperatures, especially under slow strain rate or creep conditions, have prevented the use of iron–aluminium alloys or aluminide intermetallics, despite decades of intensive research. The low strength at high temperature is due to the inability of hardening particles such as carbides to resist dissolution or coarsening at these temperatures. A new iron–aluminium alloy with zirconium and chromium additions has been discovered that forms fine coherent precipitates on annealing cast material that remain very fine even after extended annealing at temperatures as high as 900 °C. These precipitates have a complex Fe3Zr structure and form in a cube-on-cube orientation relationship in the body-centred cubic matrix. The excellent stability of these intermetallic precipitates, due to low solute solubility and diffusivity in the iron–aluminium matrix, and the low energy, near-coherent interface, allows important improvements in high-temperature creep stresses.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 54, Issue 9, May 2006, Pages 2335–2341
نویسندگان
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