کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7881623 | 1509602 | 2014 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-temperature deformation mechanisms in a polycrystalline nickel-base superalloy studied by neutron diffraction and electron microscopy
ترجمه فارسی عنوان
مکانیزم های تغییر شکل در دمای بالا در یک پلیمر بلور نیکل پایه فوق العاده تحت بررسی با پراش نوترون و میکروسکوپ الکترونی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
To study the effect of γⲠprecipitate size on the deformation behaviour of a polycrystalline nickel-based superalloy, model microstructures with a unimodal γⲠsize distribution were developed and subjected to loading experiments at 750 °C. Neutron diffraction measurements were carried out during loading to record the elastic lattice strain response of the γ and γⲠphase. A two-site elasto-plastic self-consistent model (EPSC) assisted in the interpretation of the elastic lattice strain response. In addition, the microstructures of the deformed specimens were analysed by (scanning) transmission electron microscopy (STEM). Excellent agreement was found between the EPSC and STEM results regarding a joint deformation of the γ and γⲠphase in the fine γⲠmicrostructures and for low plastic strains in the medium γⲠmicrostructures. With increasing γⲠsize and increasing degree of plastic deformation, both experimental methodologies revealed a tendency of the two phases to deform independently.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 74, 1 August 2014, Pages 18-29
Journal: Acta Materialia - Volume 74, 1 August 2014, Pages 18-29
نویسندگان
E.M. Francis, B.M.B. Grant, J. Quinta da Fonseca, P.J. Phillips, M.J. Mills, M.R. Daymond, M. Preuss,