کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7990013 | 1516125 | 2018 | 44 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Phase stability, thermal properties and microstructure characteristics of U-15â¯wt.% Cr alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The thermal stability, thermal properties, phase transformation and microstructure characteristics of U-15â¯wt.%Cr alloy were investigated through a combination of calorimetry, dilatometry, x-ray diffraction and electron microscopy techniques. It is found that at room temperature, both as-cast and homogenized alloys contained metastable βm-U phase, in addition to equilibrium α-U and Cr. The electron microscopy of homogenized sample revealed fine scale nanosized dispersions of βm-U+Cr phases. The presence of metastable βm-U phase influenced the on-heating thermal stability significantly. It is found that upon heating, βm-Uâα-U+Cr transformation preceded the occurrence of equilibrium α-U+Crâβ-U+Crâγ-U+Cr transformations. The nonequilibrium βm-Uâα-U conversion took place in a continuous manner. On the other hand, the transformations, α-U+Crâβ-U+Crâγ-U+Cr occurred at distinct transformation temperatures with measurable changes in enthalpy. The calorimetry results are found to be in accord with dilatometry measurements, which showed a positive jump in the dilatational strain (Îl/lo) across α-U+Crâβ-U+Crâγ-U+Cr transformations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 769, 15 November 2018, Pages 264-273
Journal: Journal of Alloys and Compounds - Volume 769, 15 November 2018, Pages 264-273
نویسندگان
Santhosh Rameshkumar, Raju Subramanian, Mythili Rengachari, Saroja Saibaba,