کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1573110 | 1514670 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructures and mechanical properties of β-NiAlHf coated single crystal superalloy
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Microstructures and mechanical properties of β-NiAlHf coated single crystal superalloy Microstructures and mechanical properties of β-NiAlHf coated single crystal superalloy](/preview/png/1573110.png)
چکیده انگلیسی
A β-NiAlHf coating was deposited by electron beam physical vapor deposition (EB-PVD) onto single crystal (SC) superalloy substrate. The microstructure evolution of the NiAlHf coating after annealing at 1100 °C was investigated and the mechanical properties of the coated substrate were also concerned. The crack initiation and propagation behavior of the coated substrate during three-point bending was studied. An interdiffusion zone (IDZ) was formed between the coating and substrate and the hardness of the precipitates in the IDZ layer was relatively higher than that of the coating and the substrate. The annealed specimen during bending revealed different crack initiation and propagation behavior from the uncoated specimen. Cracks were initiated at the carbides in the uncoated alloy. For the coated specimen after 10 h annealing, cracks were initiated mostly in the IDZ layer, due to the presence of μ-TCP phases. For the coated specimen after 50 h annealing, cracks were generated at the top of triangle-shaped γâ²-Ni3Al phases where stress concentration occurred, which finally propagated into the substrate, leading to the reduction of the alloy in strength.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 673, 15 September 2016, Pages 39-46
Journal: Materials Science and Engineering: A - Volume 673, 15 September 2016, Pages 39-46
نویسندگان
Xueyuan Gong, Yonghong Yang, Yue Ma, Hui Peng, Hongbo Guo,