کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1608044 | 1516242 | 2015 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In-situ environmental TEM study of γâ²-γ phase transformation induced by oxidation in a nickel-based single crystal superalloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: In-situ environmental TEM study of γâ²-γ phase transformation induced by oxidation in a nickel-based single crystal superalloy In-situ environmental TEM study of γâ²-γ phase transformation induced by oxidation in a nickel-based single crystal superalloy](/preview/png/1608044.png)
چکیده انگلیسی
Oxidation induced phase transformation from γⲠto γ phase can severely degrade creep properties of superalloys and has been studied by in-situ environmental transmission electron microscopy, energy dispersive spectrometer and electron energy loss spectroscopy in detail. The in-situ observation showed that, during oxidization, the ordered γⲠphase (L12) gradually transformed to disordered γ phase (face-centered cubic (fcc)) with the appearance of oxidation product consisted of γ-Al2O3 crystallites with a strong crystallographic texture. This directly proves that γâ²-γ phase transformation are induced by aluminum oxidation with aluminum depleted in γⲠphase. Furthermore, the oxygen was demonstrated to diffuse preferentially through γâ²-γ phase interface which is different from previously thought (γ matrix).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 651, 5 December 2015, Pages 255-258
Journal: Journal of Alloys and Compounds - Volume 651, 5 December 2015, Pages 255-258
نویسندگان
Qingqing Ding, Zhenju Shen, Sisi Xiang, He Tian, Jixue Li, Ze Zhang,