排序方式: 共有2条查询结果,搜索用时 217 毫秒
1
1.
Nikulina A. A. Smirnov A. I. Turichin G. A. Klimova-Korsmik O. G. Babkin K. D. 《Metal Science and Heat Treatment》2017,59(7-8):534-539
Metal Science and Heat Treatment - The structure of laser-welded joints of parts having different thicknesses fabricated from alloys based on aluminum and titanium has been studied. Results of... 相似文献
2.
Mariia Rashkovets Aelita Nikulina Gleb Turichin Olga Klimova-Korsmik Marina Sklyar 《Journal of Materials Engineering and Performance》2018,27(12):6398-6406
Phase composition and structural features of nickel-based alloy EP741 obtained by high-speed direct laser deposition were discussed in the paper. The technology of high-speed direct laser deposition has been successfully applied during the formation of samples with the various operating parameters of the experimental device. The laser power was between 450 and 1200 W, the scanning speed was 1.2 mm/s, the powder feed rate was 45 g/min, and the laser beam diameter was 1.2 mm. The structure and phase composition of the initial material and as-deposited samples were studied using optical and scanning electron microscopy, x-ray analysis and transmission electron microscopy. The investigation has shown that spherical particles of powder (EP741) can be used to form products by additive manufacturing with the presence of additional heat treatment, since almost all the as-deposited samples obtained do not contain cracks, and large volume of pores was observed only in the sample obtained with the power of 450 W. In addition, the phase composition of the as-deposited samples showed a high content of precipitating phase Ni3(Al, Ti) in matrix, which is coherent to the solid solution based on nickel. In theory, the presence of Ni3(Al, Ti) phase corresponds to the heat-treated nickel-base alloy obtained by standard methods of processing. 相似文献
1