Modes of Grain Selection in Spiral Selector during Directional Solidification of Nickel-base Superalloys

材料科学技术（英文）, 2012, 28(3): 214-220.

Modes of Grain Selection in Spiral Selector during Directional Solidification of Nickel-base Superalloys

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1.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China／Graduate School of Chinese Academy of Sciences, Beijing 100049, China

2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China／Graduate School of Chinese Academy of Sciences, Beijing 100049, China

3.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

4.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

5.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

6.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi＇an 710072, China

7.Aviation Industry Corporation of China （AVIC） Shenyang Liming Aero-engine （Group） Corporation LTD., Shenyang 110043, China

8.Aviation Industry Corporation of China （AVIC） Shenyang Liming Aero-engine （Group） Corporation LTD., Shenyang 110043, China

9.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

基金项目: the fund of the State Key Laboratory of Solidification Processing in NWPU under Grant No.SKLSP201112 supported by the National Basic Research Program(973 Program) of China under Grant No.2010CB631200(2010CB631206) the National Natural Science Foundation of China(NSFC) under Grant No.50801061,No.50931004,No.51071165

关键词：粮食增长 , 镍基高温合金 , 螺旋 , 凝固过程 , ProCAST , 几何形状 , 晶粒取向 , 早期阶段

Modes of Grain Selection in Spiral Selector during Directional Solidification of Nickel-base Superalloys

Keywords： Ni-base single crystal superalloys Competitive grain growth Geometry shape Directional solidification Spiral selector ,

The modes of grain selection in spiral selector were investigated by both a ProCAST simulation and experimental confirmation.The results show that the efficiency of grain selection in starter block is associated with the geometry shape.At the early stage of grain selection,the optimization of grain orientation is dominated by competitive grain growth,but the optimization of grain orientation in starter block is gradually dominated by geometry shape at the later stage of grain selection.Besides,the spiral part could also optimize the orientation of the selected single crystal when the initial angle is large enough,and the single crystal selection in spiral parts with different pitch lengths and initial angles is dominated by different modes.The simulation results agree well with experimental ones.

参考文献

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材料期刊网

Modes of Grain Selection in Spiral Selector during Directional Solidification of Nickel-base Superalloys

Modes of Grain Selection in Spiral Selector during Directional Solidification of Nickel-base Superalloys

参考文献