کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7967314 | 1514191 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Anisotropic dislocation loop distribution in alloy T91 during irradiation creep
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
Ferritic-martensitic (FM) steel T91 was subjected to irradiation with 3Â MeV protons while under load at stresses of 100Â MPa, 180Â MPa, and 200Â MPa. Transmission electron microscopy of crept T91 samples was conducted to determine the nature of the loops and to quantify the edge-on dislocation loop density as a function of their orientation to the tensile axis. Loops were determined to be interstitial in nature of the type aoã1Â 0Â 0ã. The distribution of aoã1Â 0Â 0ã loops was found to be strongly anisotropic in which loops preferentially formed with their normal in the tensile direction. An empirical correlation was developed to describe the relationship between the orientation of the loop normal to the tensile axis and the local dislocation loop density. Loop anisotropy was found to increase as a function of the applied stress and their strain contributions relative to total creep strain were calculated at 4-11% of the total creep strain. Results from this study provide a means for quantifying empirically measured anisotropic microstructure and including it in irradiation creep mechanisms for FM steels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 454, Issues 1â3, November 2014, Pages 255-264
Journal: Journal of Nuclear Materials - Volume 454, Issues 1â3, November 2014, Pages 255-264
نویسندگان
Cheng Xu, Gary S. Was,