Investigation of the final stages of solidification and eutectic phase formation in Re and Ru containing nickel-base superalloys

被引：78
作者：
Heckl, A. [1 ]
Rettig, R. [1 ]
Cenanovic, S. [2 ]
Goeken, M. [2 ]
Singer, R. F. [1 ]
机构：
[1] Univ Erlangen Nurnberg, Inst Sci & Technol Met, Dept Mat Sci & Engn, D-91058 Erlangen, Germany
[2] Univ Erlangen Nurnberg, Inst Gen Mat Properties, Dept Mat Sci & Engn, D-91058 Erlangen, Germany
来源：
JOURNAL OF CRYSTAL GROWTH | 2010年 / 312卷 / 14期
关键词：
Final stage solidification; Microsegregation; 3-D microstructure; Eutectic island; FIB tomography; Nickel-base superalloys; SINGLE-CRYSTAL SUPERALLOYS; NI-AL SYSTEM; CASTABILITY; FRACTION; BEHAVIOR; GAMMA;
D O I：
10.1016/j.jcrysgro.2010.03.041
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The microstructure resulting from the final stages of solidification-commonly referred to as eutectic islands-has been analysed in detail for three nickel-base superalloys containing Re and Ru. Focused ion beam 3-D reconstruction and EBSD-analysis were used to clarify the origin of different eutectic structure types. One common type of parent 3-D eutectic structure was identified. The solidification process of the final solidifying liquid has been further investigated by electron probe microanalysis mappings along with DICTRA simulations. Two models for diffusion controlled phase transformations are shown to present a fair description of the solidification sequence. (C) 2010 Elsevier B.V. All rights reserved.
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页码：2137 / 2144
页数：8
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