Effects of Re and Ru on the solidification characteristics of nickel-base single-crystal superalloys

Gang Liu; Lin Liu; Xinbao Zhao; Bingming Ge; Jun Zhang; Hengzhi Fu

doi:10.1007/s11661-011-0673-4

Effects of Re and Ru on the solidification characteristics of nickel-base single-crystal superalloys

Gang Liu
, Lin Liu
, Xinbao Zhao
, Bingming Ge
, Jun Zhang
, Hengzhi Fu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

The solidification characteristics, such as the phase transformation temperature and partition coefficient, were investigated in four Ni-base single-crystal superalloys with varied contents of Re and Ru. Differential scanning calorimetry (DSC) analysis reveals that the liquidus and solidus temperatures decrease with increasing levels of Re additions. However, the Ru only has negligible influences on the liquidus and solidus temperatures. The partition coefficient of constituent elements is investigated by using the directional solidification followed quenching (DSQ) technique. Re is found to reduce the segregation of Re and W, whereas Ru only has negligible effects on the segregation of Re and W. For comparison, the matrix scanning is performed on the representative dendritic structures. With increasing withdrawal rate, Re and Ru additions show the stronger influences on segregation behavior of alloying elements, particularly for Al and Ta.

Original language	English
Pages (from-to)	2733-2741
Number of pages	9
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	42
Issue number	9
DOIs	https://doi.org/10.1007/s11661-011-0673-4
State	Published - Sep 2011

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abstract = "The solidification characteristics, such as the phase transformation temperature and partition coefficient, were investigated in four Ni-base single-crystal superalloys with varied contents of Re and Ru. Differential scanning calorimetry (DSC) analysis reveals that the liquidus and solidus temperatures decrease with increasing levels of Re additions. However, the Ru only has negligible influences on the liquidus and solidus temperatures. The partition coefficient of constituent elements is investigated by using the directional solidification followed quenching (DSQ) technique. Re is found to reduce the segregation of Re and W, whereas Ru only has negligible effects on the segregation of Re and W. For comparison, the matrix scanning is performed on the representative dendritic structures. With increasing withdrawal rate, Re and Ru additions show the stronger influences on segregation behavior of alloying elements, particularly for Al and Ta.",

author = "Gang Liu and Lin Liu and Xinbao Zhao and Bingming Ge and Jun Zhang and Hengzhi Fu",

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T1 - Effects of Re and Ru on the solidification characteristics of nickel-base single-crystal superalloys

AU - Liu, Gang

AU - Liu, Lin

AU - Zhao, Xinbao

AU - Ge, Bingming

AU - Zhang, Jun

AU - Fu, Hengzhi

PY - 2011/9

Y1 - 2011/9

N2 - The solidification characteristics, such as the phase transformation temperature and partition coefficient, were investigated in four Ni-base single-crystal superalloys with varied contents of Re and Ru. Differential scanning calorimetry (DSC) analysis reveals that the liquidus and solidus temperatures decrease with increasing levels of Re additions. However, the Ru only has negligible influences on the liquidus and solidus temperatures. The partition coefficient of constituent elements is investigated by using the directional solidification followed quenching (DSQ) technique. Re is found to reduce the segregation of Re and W, whereas Ru only has negligible effects on the segregation of Re and W. For comparison, the matrix scanning is performed on the representative dendritic structures. With increasing withdrawal rate, Re and Ru additions show the stronger influences on segregation behavior of alloying elements, particularly for Al and Ta.

AB - The solidification characteristics, such as the phase transformation temperature and partition coefficient, were investigated in four Ni-base single-crystal superalloys with varied contents of Re and Ru. Differential scanning calorimetry (DSC) analysis reveals that the liquidus and solidus temperatures decrease with increasing levels of Re additions. However, the Ru only has negligible influences on the liquidus and solidus temperatures. The partition coefficient of constituent elements is investigated by using the directional solidification followed quenching (DSQ) technique. Re is found to reduce the segregation of Re and W, whereas Ru only has negligible effects on the segregation of Re and W. For comparison, the matrix scanning is performed on the representative dendritic structures. With increasing withdrawal rate, Re and Ru additions show the stronger influences on segregation behavior of alloying elements, particularly for Al and Ta.

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SN - 1073-5623

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JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

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Effects of Re and Ru on the solidification characteristics of nickel-base single-crystal superalloys

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