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- Title
Enhanced Grain Refinement and Porosity Control of the Polycrystalline Superalloy by a Modified Thermally Controlled Solidification.
- Authors
Jie, Ziqi; Zhang, Jun; Huang, Taiwen; Su, Haijun; Li, Yafeng; Liu, Lin; Yang, Wenchao; Fu, Hengzhi
- Abstract
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.
- Subjects
GRAIN refinement; HEAT resistant alloys; SOLIDIFICATION
- Publication
Advanced Engineering Materials, 2016, Vol 18, Issue 10, p1785
- ISSN
1438-1656
- Publication type
Article
- DOI
10.1002/adem.201600320