کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1582872 | 1514879 | 2008 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Interface topography and residual stress distributions in W coatings for fusion armour applications Interface topography and residual stress distributions in W coatings for fusion armour applications](/preview/png/1582872.png)
Vacuum plasma sprayed (VPS) tungsten (W) coatings are potential plasma facing components in future fusion power plants. However, the large coefficient of thermal expansion mismatch between W and underlying structural steels and other metallic materials poses a significant problem for manufacturing and service life because of the evolution of large thermally induced stresses leading to failure. In this paper, the effects of the substrate/coating interface 3D geometry on stress distributions are investigated using finite element analysis and VPS experiments to manufacture up to 2 mm thick W coatings. The key factors that affect internal stress distributions during thermal exposure have been identified including graded composition inter-layers, stress concentration effects, mechanical adhesion, and the possible role of segmentation in relieving coating stresses on surface sculptured substrates.
Journal: Materials Science and Engineering: A - Volume 477, Issues 1–2, 25 March 2008, Pages 35–42