Enhanced Grain Refinement and Porosity Control of the Polycrystalline Superalloy by a Modified Thermally Controlled Solidification
Enhanced Grain Refinement and Porosity Control of the Polycrystalline Superalloy by a Modified Thermally Controlled Solidification
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DOI：
10.1002/adem.201600320
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发表时间：
2016-10
影响因子：
3.6
通讯作者：
Zi-qi Jie;Jun Zhang;Tai-wen Huang;H. Su;Yafeng Li;Lin Liu;Wenchao Yang;H. Fu
中科院分区：
文献类型：
--
作者：
Zi-qi Jie;Jun Zhang;Tai-wen Huang;H. Su;Yafeng Li;Lin Liu;Wenchao Yang;H. Fu
An integrated technique, combining the modified thermally controlled solidification (MTCS) process with the mixed refiner of Co3FeNb2 and CrFeNb ternary intermetallic compounds, has been designed to enhance grain refinement and restrain porosity in polycrystalline IN718 C superalloy. The refinement efficiency of integrated technique is quite superior to that by convention casting (CC) process with refiner, as experiment results show that the grain size is refined from 3 340 to 126 µm and, during the refinement process, the microstructure of IN718 C superalloy evolves from dendrite to granular structure. Meanwhile, comparing with the CC process, this integrated technique has significantly eliminated porosities and dramatically improved the mechanical properties.
