کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7990447 | 1516128 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Atomic arrangement and formation of planar defects in the μ phase of Ni-base single crystal superalloys
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
The internal characteristics of the μ phase in Ni-base single crystal superalloys aged at 1100â¯Â°C for 1000â¯h were investigated via spherical aberration-corrected transmission electron microscopy. There were a large number of planar defects on the (001) plane at the growth tip of the μ phase. HAADF-STEM results show that these planar defects were mainly of two types. 1) A twin structure with a mirror plane of the middle atomic planes of the Zr4Al3 sheet, which was generated by shearing of atoms in the MgCu2 sheet along the [1-10] direction. 2) A mirror-symmetrical stacking fault of two Zr4Al3 sheets, which was formed by the pulling out of a single MgCu2 sheet. The planar defects were mainly caused by coordination of the distortions of the μ phase and the matrix. Segregation of Mo, Cr, and Re elements occurred near stacking faults, rather than twin structures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 766, 25 October 2018, Pages 775-783
Journal: Journal of Alloys and Compounds - Volume 766, 25 October 2018, Pages 775-783
نویسندگان
Shiyu Ma, Xueqiao Li, Jianxin Zhang, Jide Liu, Pan Li, Youjian Zhang, Huixin Jin, Wenyang Zhang, Yizhou Zhou, Xiaofeng Sun, Qing Zhang, Yanhui Chen, Shengcheng Mao,