کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1580745 | 1514848 | 2009 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the effect of micrograin crystallography on creep of FeCr alloys
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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: On the effect of micrograin crystallography on creep of FeCr alloys On the effect of micrograin crystallography on creep of FeCr alloys](/preview/png/1580745.png)
چکیده انگلیسی
We use scanning electron orientation imaging microscopy to study the role of micrograin orientation and the role of the crystallographic character of micrograin boundaries during creep of two iron-chromium alloys with similar chromium contents. The ultra fine grained microstructure of a creep resistant tempered martensite ferritic steel (German grade X20) is characterized by carbides which pin micrograin boundaries. Without this type of stabilization, a binary Fe10Cr alloy processed by equal channel angular pressing (ECAP) with the same micrograin size creeps much faster. This difference in creep rate was attributed to the stabilization of micrograin boundaries by carbides [A. Kostka, K.-G. Tak, R.J. Hellmig, Y. Estrin, G. Eggeler, Acta Mater. 55 (2007) 539]. But it was not clear whether a difference in the crystallographic nature of micrograin boundaries also contributes to the difference in creep rates. The results obtained in the present study show that this is not the case. We also consider the formation of macro- and microtextures during processing (X20: pipe making followed by tempering, Fe10Cr: ECAP followed by tempering) and their evolution during creep. Creep deformation results in a decrease of preferential micrograin orientations in tempered martensite ferritic steels and triggers recrystallization events in the ECAP-processed binary Fe10Cr alloy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 510â511, 15 June 2009, Pages 121-129
Journal: Materials Science and Engineering: A - Volumes 510â511, 15 June 2009, Pages 121-129
نویسندگان
K.-G. Tak, U. Schulz, G. Eggeler,