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| Microstructural Evolution of Recrystallization During Heat Treatment in DD6 Single Crystal Superalloy |
| QU Yan-ping1, LIU Li-rong1, ZU Guo-qing1, JIN Tao2, HU Zhuang-qi2 |
1. Shenyang University of Technology, Shenyang 110870, China;
2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
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Abstract Microstructural evolution of recrystallization during heat treatment in DD6 single crystal superalloy were investigated.The results showed that during pre-treatment at the temperature up to as-cast γ′ phase solvus,no recrystallization occurred,while after solution treatment,rapid recrystallization occurred.During preheat treatment above the temperature,recrystallization occurred.The recrystallization grain boundary was thin and composed of bigger γ′phase.Compared with the microstructure after solution treatment,the recrystallization depth after aging treatment had no obvious change.During aging treatment,grain boundary turned into wider cellular structure and some granular M6C carbide precipitated from grain boundary.
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Received: 14 February 2011
Published: 20 August 2011
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2011, Vol. 0 
