کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1576153 | 1514770 | 2013 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of γⲠsize and alloy chemistry on dynamic strain ageing in advanced polycrystalline nickel base superalloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The effect of γⲠsize and alloy chemistry on dynamic strain ageing in advanced polycrystalline nickel base superalloys The effect of γⲠsize and alloy chemistry on dynamic strain ageing in advanced polycrystalline nickel base superalloys](/preview/png/1576153.png)
چکیده انگلیسی
In-situ stair case loading experiments at 500 °C using neutron diffraction have been carried out on two γⲠstrengthened polycrystalline nickel base superalloys, RR1000 and Udimet 720LI. In order to study the effect of γⲠparticle size, uni-modal γⲠsize distributions were generated in both alloys. Both alloys showed signs of dynamic strain aging (DSA) although the strain bursts were far more significant in RR1000 than Udimet 720LI. The neutron diffraction experiment revealed load partitioning between γ and γⲠin the case of the coarse γⲠmicrostructure but not in the fine γⲠmicrostructure. When load partitioning occurred, γⲠpicked up significantly larger elastic strains during a DSA related strain burst than the γ matrix, indicating that mainly the matrix phase deforms plastically during such an event. The peak broadening data confirmed this. Subsequent to the strain burst, a reduction in the elastic strain partitioning was observed indicating preferred yielding of the γⲠphase during this stage. The differences in DSA detected between RR1000 and Udimet 720LI are discussed in terms of possible contribution of the various alloying elements.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 573, 20 June 2013, Pages 54-61
Journal: Materials Science and Engineering: A - Volume 573, 20 June 2013, Pages 54-61
نویسندگان
Benedict M.B. Grant, Elisabeth M. Francis, João Quinta da Fonseca, Michael Preuss, Mark R. Daymond,