Interdiffusion within the β-phase region of the Ni–Co–Cr–Al quaternary system

Wei, Hua; Zhang, H.Y.; Sun, Xiaofeng; Dargusch, Matthew S.; Yao, Xiangdong

doi:10.1016/j.jallcom.2009.12.146

Cited by 11 publications

(6 citation statements)

References 52 publications

(60 reference statements)

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“…It can be concluded that Cr shows a preference for Al sublattice irrespective of the stoichiometry when temperature is more than about 1100K. Combining the available experimental data [35~37], it can thus be acceptable that the B2 phase in the Ni-Cr-Al system can be described as β-Ni(Al,Cr).It indicates that its diffusion model should be described as being (Ni,Va)(Al,Cr).Regretfully, the positron lifetime measurement [43] (Fig. 2) shows that the positron lifetime annihilated at defects in the β-Ni(Al,Cr) phase is clearly less than that in the binary NiAl phase, and also markedly less than that in the Ni50Al50 phase (τm=240ps).…”

Section: Optimization Proceduresmentioning

confidence: 95%

“…Hopfe et al [36] used the square root diffusivity analysis to measure the interdiffusion coefficients of the B2 phase in the Ni-Cr-Al ternary system by four single-phase B2/B2 diffusion couples andfound that the addition of Cr to the Ni1.28Al0.72 alloy could tend to reduce the values of AlAl D in the B2 phase. Inter-diffusion coefficients of the B2 phase in the Ni-Co-Cr-Al quaternary system were estimated by the square root diffusivity analysis [37]. The obtained results indicated that the cross interdiffusivities other than AlCo D were less than the main interdiffusivities and that the values of Ali D were greater than those of Cri D and Coi D .…”

Section: Experimental Informationmentioning

confidence: 99%

“…1 The predicted and experimental vacancy Fig. 2 Comparison of positron lifetimes concentration per lattice site of the B2 phase in experimentally in the binary β-NiAl and ernary the Ni-Al binary system [40] t β-Ni(Cr,Al) phases at various temperatures [43] It is worth noting, however, that Huang and Chang [13], when assessing a thermodynamic description of the B2 phase in the Ni-Al-Cr system, used the model (Al,Cr,Ni)(Cr,Ni,Va) which is a natural extension of the model (Al,Ni)(Ni,Va) for the binary Ni-Al B2 phase by adding Cr to both sublattices [39]. Since Huang and Chang [13] neglected some of the possible constituents in their model, aimprovement of the assessment by Huang and Chang was subsequently made by Dupin etal [12], who applied the model (Al,Cr,Ni,Va)(Al,Cr,Ni,Va) to re-assess a thermodynamic description of the B2 phase in the Ni-Al-Cr system.…”

Section: Optimization Proceduresmentioning

confidence: 99%

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Assessment of Mobilities of the B2 Phase in the Nickel-Chromium-Aluminum System

Tian

梁立红

et al. 2014

MSF

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A model for diffusion is applied to the nickel-chromium-aluminum (Ni-Cr-Al) system to optimize the mobility parameters for the B2 phase by fitting the experimentally obtained inter-diffusivities. In the model, the activation energy for diffusion is expressed as a function of the degree of ordering which is evaluated from thermodynamic data. These data are used to evaluate the thermodynamic factors of the B2 phase in the Ni-Cr-Al ternary system. The interdiffusivities from the model are used to simulate diffusion experiments. The results are generally agreed with the experimental data.

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Section: Optimization Proceduresmentioning

confidence: 95%

Section: Experimental Informationmentioning

confidence: 99%

Section: Optimization Proceduresmentioning

confidence: 99%

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Assessment of Mobilities of the B2 Phase in the Nickel-Chromium-Aluminum System

Tian

梁立红

et al. 2014

MSF

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“…Söz konusu alaşımların özelliklerini bilmek, yüksek sıcaklık alaşımları için güvenilir malzemeler tasarlamak ve geliştirmek için gereklidir. Öte yandan, Ni-Cr-Co-Al sistemi hem korozyona karşı dirençli hem implantlarda kullanılan [1][2][3] ayrıca yüksek sıcaklık şiddetli çevresel koşullara karşı dirençli ve birçok farklı uygulamada önemli bir rol oynayan Ni bazlı süper alaşımların üretimi için büyük ve pratik bir öneme sahiptir. Ni-Cr-Co-Al sisteminin termodinamiğine yönelik bazı çalışmalar yapılmıştır [4][5][6] .…”

Section: Gi̇ri̇ş (Introduction)unclassified

Çok bileşenli kurşunsuz alaşımlara eşlik eden termodinamik özelliklerin Belirlenmesi

Arslan¹,

Dogan²

2018

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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Modeling of micro tools using analytical methods  Effect of spindle speed on stability diagrams  Calculation of tool vibration during micro milling operations In this study, Chou's general solution model (GSM) and the geometric models were applied to six components liquid and quaternary, ternary liquid alloys for high temperature. In all geometric models, the enthalpy and partial enthalpies of mixing of liquid Ni-Cr-CoAl -Ti-Cu of six components for the cross sections, xNi/xCr =1, xNi/xCo =1, xCr/xCo =1, r=xAl / xTi , Pb-free quaternary Au-In-Sn-Zn alloy for the cross section, xIn / xSn = 2, xSn / xZn = 1 and ternary In-Pd-Sn alloy for the cross section, xIn/xSn =1 have been evaluated at the temperatures 2000 K, 773 K and 1173 K, respectively, in order to compare with the experimental results. Generally speaking, it is seen that there is an agreement between the results of geometric models and those of thre experimental results. Figure A. For r=6, partial excess energy of Cu for the mixing in the liquid Ni-Cr-CoAl -Ti-Cu system at 2000 K using the different models. Purpose: In this study, Chou's general solution model (GSM) and the traditional geometric models were applied to liquid Ni-Cr-CoAl -Ti-Cu, Au-In-Sn-Zn and In-Pd-Sn alloys for high temperature. Theory and Methods: In this study, some models known as geometric model Chou's general solution method, Kohler, Muggianu, Toop and Colinet models were used to calculate Gibbs energy and enthalpies of three, four and six component liquid alloys. Results: The results obtained from the models used in this study were found to be mutually compatible. Conclusion: Generally speaking, it was understood that almost all of the models gave results close to the experimental results, but the GSM model supported other models in all models.

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“…The investigations are mainly focused on the interdiffusion behaviors between the Nibased coatings and Ni-based superalloys, as well as the effects on the mechanical properties of the superalloys [18][19][20][21][22]. Directionally solidified Ni-based superalloy DZ 125 has been widely applied as structural materials in advanced aero engine for gas turbine blades and vanes operating at high temperature [23].…”

Section: Introductionmentioning

confidence: 99%