The Influence of Graphite Heat Conductor Technology on the Preparation and Crystal Structure of Single Crystal Blade

Abstract:

Graphite heat conductor technology can effectively overcome the mixed crystal defect caused by geometric factors during the forming process of single crystal component. The simulation results show that, As for the component that uses heat conductor technology, the heat elimination condition in the corner of component is improved significantly. Before the melt body generating the supper-cold region at the platform end, the solidification interface will advance into the platform from the blade body with the relatively faster speed. According to the analysis of macro structure, the component with heat conductor, because of the diminution of supper-cold time and supper-cold region, the trend to generate mixed crystal on the platform reduces obviously, on one side near the wall of insulation heater, there is almost no mixed crystal on the platform.

• Periodical: Key Engineering Materials (Volume 703)
• Pages: 65-69
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.703.65
• Online since: August 2016
• Authors: Yang Li, Yu Tao Zhao*, Xiang Feng Liang, Zhi Hong Jia
• Keywords: Graphite, Heat Conductor Technology, Mixed Crystal, Single Crystal Blade

References

[1] Zhao Ming, Tu Bingyi, Chen Yanghui. Development of Structure and Manufacturing Technology of Critical Component in Aero engine. Key Manufacturing Technology of Aero engine 12(2015)42-46.

[2] YanfengWang, MingLiang, JiaweiXiang. Damage detection method for wind turbine blades based on dynamics analysis and mode shape difference curvature information. Mechanical Systems and Signal Processing48(2014)351–367.

DOI: 10.1016/j.ymssp.2014.03.006

[3] Nairong, Sun, Lanting, Zhang, Zhigang, Li. The effect of microstructure on the creep behavior of a low rhenium-containing single crystal nickel-based superalloy[J]. Materials Science and Engineering, 606(2014): 175-186.

DOI: 10.1016/j.msea.2014.03.074

[4] Wang Rongqiao, Jing Fulei, Hu Dianyin In-phase thermal–mechanical fatigue investigation on hollow single crystal turbine blades. Chinese Journal of Aeronautics, 2013, 26 (6): 1409-1414.

DOI: 10.1016/j.cja.2013.07.026

[5] Lavigne O, Ramusat C, Drawin S, et al. Relationships between microstructural instabilities and mechanical behaviour in new generation nickel-based single crystal superalloys[C] Proc. Conf. Superalloys. 2004: 667-675.

DOI: 10.7449/2004/superalloys_2004_667_675

[6] Link T, Zabler S, Epishin A, etal. Synchrotron tomography of porosity in single-crystal nickel-base superalloys[J]. Materials Science and Engineering A, 2006, 425(2): 47-54.

DOI: 10.1016/j.msea.2006.03.005

[7] YaNan Fan, Hui-Ji Shi, Wen-Hui Qiu. Constitutive modeling of creep behavior in single crystal superalloys: Effects of rafting at high temperatures。Materials Science and Engineering: A, Vol. 644(17) Sep. 2015: 225-233.

DOI: 10.1016/j.msea.2015.07.058

[8] Dexin Ma, Bin Zhou, Andreas Bührig-Polaczek. Development and Application of Heat-Conductor Technique for Single Crystal Components of Superalloys. Advanced Materials Research 278 (2011) : 306-311.

DOI: 10.4028/www.scientific.net/amr.278.306

[9] D. Ma* and A. Bu¨hrig-Polaczek. Development of heat conductor technique for single crystal components of superalloys[J]. International Journal of Cast Metals Research. 2009, 22(6): 422-429.

DOI: 10.1179/174313309x449255