Structure of continuously cast Ni-based superalloy Inconel 713C
- 作者：Zupanic ; F. ; Boncina ; T. ; Krizman ; A. ; Tichelaar ; F.D.
- 关键词：Transition metal alloys ; High temperature alloys ; Casting ; X-Ray diffraction ; TEM
- 刊名：Journal of Alloys and Compounds
- 出版年：2001
- 期刊代码：45_09258388
- 类别：ms
- 出版时间：November 14, 2001
- 卷：329
- 期：1-2
- 页码：290-297
- 文件大小：2.13 M
摘要
In this work, we characterised the structure of continuously cast Ni-based superalloy IN 713C (
10 mm, water cooled Cu–Be mould, argon atmosphere) using several microstructural characterization techniques (LM, SEM, TEM, EDS, XRD). The structure consisted of columnar dendritic γ-grains with apparently fully coherent and rather uniformly distributed γ′ precipitates (size 
50 nm), primary MC carbide and MC/γ eutectic. The eutectic MC carbide contained a considerable amount of Cr: (Nb0.4Mo0.25Ti0.18Cr0.16)C resulting in a decrease in the MC lattice constant from 0.441 to 0.435 nm. Due to higher cooling rates at continuous casting the microstructural constituents were much finer than in the as-received and DTA samples. In addition, the continuously cast specimens did not contain the γ/γ′ eutectic and some minor phases despite stronger segregation of solute elements. The partition coefficients of solute elements Ti, Mo, Nb, Al, Cr, Fe and Ni in the continuously cast IN 713C were 0.55, 0.82, 0.46, 0.99, 0.96, 1.02 and 1.03, respectively.
10 mm, water cooled Cu–Be mould, argon atmosphere) using several microstructural characterization techniques (LM, SEM, TEM, EDS, XRD). The structure consisted of columnar dendritic γ-grains with apparently fully coherent and rather uniformly distributed γ′ precipitates (size 50 nm), primary MC carbide and MC/γ eutectic. The eutectic MC carbide contained a considerable amount of Cr: (Nb0.4Mo0.25Ti0.18Cr0.16)C resulting in a decrease in the MC lattice constant from 0.441 to 0.435 nm. Due to higher cooling rates at continuous casting the microstructural constituents were much finer than in the as-received and DTA samples. In addition, the continuously cast specimens did not contain the γ/γ′ eutectic and some minor phases despite stronger segregation of solute elements. The partition coefficients of solute elements Ti, Mo, Nb, Al, Cr, Fe and Ni in the continuously cast IN 713C were 0.55, 0.82, 0.46, 0.99, 0.96, 1.02 and 1.03, respectively.