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| Effect of Ti/Al Ratio on the Microstructure and Creep Property in a Directionally Solidified Ni-base Superalloy |
| HAN Fenfen LI Hui LOU Langhong |
| Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 |
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Cite this article:
HAN Fenfen LI Hui LOU Langhong. Effect of Ti/Al Ratio on the Microstructure and Creep Property in a Directionally Solidified Ni-base Superalloy. Chin J Mater Res, 2012, 26(4): 361-366.
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Abstract The microstructure and creep property of a directionally solidified nickel base superalloy with different Ti/Al ratio was observed and the as-cast and heat treated microstructure was analyzed by OM and SEM. Partition ratio of alloy element in γ and γ' phase was measured by TEM equipped with EDS. The influences of Ti/Al ratio on the microstructure and the creep property were investigated. The results show that the amount of eutectics in the as-cast samples increased obviously and η phase formed around the eutectic with the increasing of Ti/Al ratio; meantime, the incipient melting temperature decreased and the size of γ' phase in the heated samples increased and the morphology turned irregular. No obvious effect of Ti/Al ratio was found on the creep properties of the present experiment alloy.
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Received: 23 February 2012
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| Fund: Supported by the National Basic Research Program (973 Program) of China No.2010CB631201 and National Natural Science Foundation of China No.51171193. |
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