Effects of heat treatment and Re-content on the TCP-phase in two Ni-Mo-Cr-Re superalloys
来源期刊:Acta Metallurgica Sinica2009年第5期
论文作者:Ke HAN Weiguo JIANG Pingli MAO Yan XIN
Key words:Heat treatment; TCP-phase; Superalloy;
Abstract: The volume fraction and morphology of the TCP-phase formed in two kinds of Ni-Mo-Cr-Re superalloys under different heat treatment conditions were investigated in this paper. In Re-5% alloy, with increasing of the heat treatment temperature and prolonging the holding time, the volume fraction of TCP-phase decreased and the TCP-phase size increased. At relatively lower temperature, the TCP-phase prefers to present in the dendrite cores. In Re-10% alloy, the volume fraction and size have the same change tendency as that of in Re-5% alloy, but the morphology will change from needle-like and block-like to sphere when the temperature increases. The TCP-phases formed in these two Ni-Mo-Cr-Re alloys are σ and P phase.
Ke HAN1,Weiguo JIANG2,Pingli MAO3,Yan XIN1
(1.National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida, USA;
2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
3.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110023, China)
Abstract:The volume fraction and morphology of the TCP-phase formed in two kinds of Ni-Mo-Cr-Re superalloys under different heat treatment conditions were investigated in this paper. In Re-5% alloy, with increasing of the heat treatment temperature and prolonging the holding time, the volume fraction of TCP-phase decreased and the TCP-phase size increased. At relatively lower temperature, the TCP-phase prefers to present in the dendrite cores. In Re-10% alloy, the volume fraction and size have the same change tendency as that of in Re-5% alloy, but the morphology will change from needle-like and block-like to sphere when the temperature increases. The TCP-phases formed in these two Ni-Mo-Cr-Re alloys are σ and P phase.
Key words:Heat treatment; TCP-phase; Superalloy;
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