Effects of Re and Ru on the Solidification Characteristics of Nickel-Base Single-Crystal Superalloys

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

doi:10.1007/s11661-011-0673-4

Cited by 28 publications

(12 citation statements)

References 22 publications

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“…To assess the solidification distribution coefficients of the individual elements, the point‐matrix scanning technique with the energy‐dispersive spectroscopy (EDS) analysis was used, which was reported in previous studies . The dendritic structure perpendicular to the growth direction was obtained by cutting the cross section from the bars.…”

Section: Methodsmentioning

confidence: 99%

Effect of Al and W Contents on the Solidification and Solution Microstructure of Novel γ/γ′ Cobalt‐Base Superalloys

Zhang

et al. 2019

Adv Eng Mater

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The solidification and heat treatment characteristics of superalloys are key to engineering and practical applications. The solidification and solid solution behavior of γ/γ′ cobalt‐base superalloys Co–30Ni–xAl–(15 − x)W–5Cr–1Ta–4Ti (x = 7, 9, 11 abbreviated as 7Al8W, 9Al6W, and 11Al4W, respectively) are studied using directional solidification experiments. The results indicate that there are Laves phase, (γ + γ′)e eutectics, and (β + γ′)e eutectics in the interdendritic regions for the 7Al8W alloy. The solidification sequence of the 7Al8W alloy is L → L1 + γ → L2 + γ + Laves → L3 + γ + Laves + (β + γ′)e →L4 + γ + Laves + (β + γ′)e + (γ + γ′)e → γ + Laves + (β + γ′)e + (γ + γ′)e. As the Al content increases and the W content decreases, the Laves phase fraction in the alloy decreases and the (β + γ′)e eutectics fraction increases. The Laves phase completely disappears in the 11Al4W alloy. An unremovable μ phase forms in the 7Al8W alloy during solution treatment. The 9Al6W alloy and 11Al4W alloy can exhibit a γ single‐phase microstructure after single‐stage solution treatment (1250 °C for 1 h) and two‐stage solution treatment (1210 °C for 1 h + 1275 °C for 1 h), respectively. These experimental results are helpful for composition optimization, solidification, and solution treatment parameter determination of novel γ/γ′ cobalt‐base superalloys.

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Section: Methodsmentioning

confidence: 99%

Effect of Al and W Contents on the Solidification and Solution Microstructure of Novel γ/γ′ Cobalt‐Base Superalloys

Zhang

et al. 2019

Adv Eng Mater

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“…2 shows the DSC curves and solidification characteristic temperatures of experimental alloys. Two obvious exothermic peaks coexisted in the DSC cooling curves of Alloy 1, Alloy 3 and Alloy 4, where the peak at higher temperature represented the solidification of primary phase, and the peak at lower temperature implied the interdendritic region (formed just after the solidification of primary phase) and/or interdendritic precipitation (formed at the last stage of solidification) [31,32]. It is worth noting that in Alloy 3, the heat release of the exothermic peak at lower temperature was significantly higher than those in other alloys, which might indicate that the volume fraction of interdendritic region and/or interdendritic precipitation in Alloy 3 was significantly higher than those of other alloys.…”

Section: Methodsmentioning

confidence: 99%

“…It is noteworthy that the previous studies indicated undercooling as significantly decreased solidification characteristic temperatures in the DSC cooling curve [31,32]. Herein, only DSC heating curves were used to determine solidification characteristic temperature in this study.…”

Section: Effect Of Al Content On Solidification Characteristic Tempermentioning

confidence: 99%

Influence of Al content on non-equilibrium solidification behavior of Ni–Al–Ta model single crystal alloys

Zhou

Zhang

et al. 2016

Journal of Crystal Growth

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“…The composition of Pb 39 Bi 25 Sn 36 (wt.%) is indicated on the liquid projection of Pb-Bi-Sn ternary alloy [8][9] (Fig. 1).…”

Section: Solidification Sequence Analyzed By Ternary Phase Diagram Anmentioning

confidence: 99%

Solidification sequence and as-cast microstructure of a model Pb-Bi-Sn alloy with quasi-peritectic reaction

et al. 2019

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I n the past few decades, the solidification behavior of binary alloys with dendritic, eutectic or peritectic reactions has been widely investigated. However, the alloys for industrial application are multicomponent alloys. The quasi-peritectic reaction, which was defined as: L+α→β+γ, where L indicates the liquid phase, and α, β, and γ indicate the solid phases, are usually observed during solidification of multicomponent alloys. For example, G. Sha et al. [1] investigated the as-cast microstructure of Al-Si-Fe alloys, and found two quasiperitectic reactions: L+Al 13 Fe 4 →α-AlFeSi+α-Al and L+α-AlFeSi→β-AlFeSi+α-Al. Additionally, the quasiperitectic reaction was also observed during solidification of solder alloys, such as Cu-Ni-Sn [2] , Pb-Bi-Sn [3] and Cu-Sn-Zn [4]. Recently, refractory alloys, such as Ta-Al-Fe [5, 6] and Nb-Al-Co [7] , which were treated as the potential high-temperature structural materials, also exhibit quasi-peritectic reaction. The solidification behavior of ternary alloys are much more complicated than the counterpart of binary alloys. Particularly, the solidification parameters, such as thermal gradient and cooling rate, have strong effects on the morphology, size,

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Effects of Re and Ru on the Solidification Characteristics of Nickel-Base Single-Crystal Superalloys

Cited by 28 publications

References 22 publications

Effect of Al and W Contents on the Solidification and Solution Microstructure of Novel γ/γ′ Cobalt‐Base Superalloys

Effect of Al and W Contents on the Solidification and Solution Microstructure of Novel γ/γ′ Cobalt‐Base Superalloys

Influence of Al content on non-equilibrium solidification behavior of Ni–Al–Ta model single crystal alloys

Solidification sequence and as-cast microstructure of a model Pb-Bi-Sn alloy with quasi-peritectic reaction

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