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| 1 | Influence of Processing Parameters on Granularity Distribution of Superalloy Powders during PREP显示文摘In order to investigate the influence of processing parameters on the granularity distribution of superalloy powders during the atomization of plasma rotating electrode processing (PREP), in this paper FGH95 superalloy powders is prepared under different processing conditions by PREP and the influence of PREP processing parameters on the granularity distribution of FGH95 superalloy powders is discussed based on fractal geometry theory. The results show that with the increase of rotating velocity of the self-consuming electrode, the fractal dimension of the granularity distribution increases linearly, which results in the increase of the proportion of smaller powders. The change of interval between plasma gun and the self-consuming electrode has a little effect on the granularity distribution, also the fractal dimension of the granularity distribution changed a little correspondingly. | HuanmingCHEN BenfuHU YiwenZHANG HuiyingLI QuanmaoYU | 2003 | Journal of Materials Science & Technology2003，19，6： | 2 |
| 2 | Numerical analysis on solidification process and heat transfer of FGH95 superalloy droplets during PREP显示文摘In order to understand the relation between microstructure of superalloy powders and its solidification progress, the processing parameters are optimized during plasma rotating electrode processing (PREP). It was predicted from the results that the droplet velocities, droplet temperature, and fractional solidification with flight time about FGH95 superalloy droplet have been carried out based on Newtonian heat transfer formulation coupled with the classical heterogeneous nucleation and the specific solidification process. It has been found that the droplet dynamic and thermal behavior is strongly affected by the distribution of droplet diameters,the proportion of cooling atmosphere, but is relatively unaffected by the droplet superheat. | HuanmingChen BenfuHu YiwenZhang QuanmaoYu HuiyingLi | 2003 | Journal of University of Science and Technology Beijing2003，10，5： | 0 |
| 3 | High temperature strength and ductility of the(C+N)strengthening Fe-Cr-Mn(W,V)steels显示文摘Fe-Cr-Mn(W, V) austenite steels used as low radioactive structural materials in fusion reactor have been investigated. The resultsshow that the high temperature strength and the creep fracture life of Fe-Cr-Mn(W, V) steels can be effectively improved through (C+N) complex-strengthening, so can be the high temperature ductility. The strength and ductility of the steels are superior to that of SUS316 steels and JPCAS below 673K. The relationship between strength, ductility andthe formation temperature is related to the evolution of deformation microstructure. The fracture and microstructure observation above 673Kindicates that the main way to further improve ductility at high temperature is the control of carbide coarsening at the grain boundaries. | BenfuHu QuanmaoYu LinLu ChengchangJia HiroshiKinoshita HeishichiroTakahashi | 2002 | Journal of University of Science and Technology Beijing2002，9，4： | 0 |
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