Precipitation of the γ′ phase in a nickel alloy under conditions of static barothermal treatment

Падалко, А. Г.; Avdyukhin, S. P.; Veselov, A. N.; Talanova, G. V.; Аладьев, Н. А.

doi:10.1134/s0036029506010137

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…The main phases in the nickel‐based superalloys are ϒ matrix, ϒ′ phase, and carbides. The ϒ phase is a solid solution with fcc crystal structure in which elements such as chromium, cobalt, iron, molybdenum, and tungsten result in strengthening the solution [7]. The ϒ′ phase is very important as it is the main factor of high‐temperature stability.…”

Section: Introductionmentioning

confidence: 99%

Effect of aging heat treatment on the microstructure and hardness of a serviced ZHS32 superalloy

Shademani

Zadeh

Rahimipour

et al. 2019

Micro & Nano Letters

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According to the gradual changes of the microstructure of superalloys during harsh service condition of turbine blades and the detrimental effects of these changes on the mechanical properties of superalloys, performing of a rejuvenation heat treatment (solution treatment + aging process) on ex-serviced superalloys is necessary. In this work, the aging heat treatment was conducted on a serviced single crystal ZHS32 superalloy in the temperature range of 950-1150°C. It was found that while performing the aging process at 950 and 1050°C for 10 h did not provide appropriate conditions for the nucleation and growth of primary ϒ′ phases, conducting aging at the temperature of 1150°C for 10 and 16 h yields to the formation of ϒ′ precipitates with the desired cuboidal morphology. The comparison of the microstructure of the rejuvenated samples with the un-rejuvenated samples confirms that with applying this procedure, the size of strengthening ϒ′ precipitates reduces and the volume fraction of these phases considerably increases, which yields to the recovery of the superalloy microstructure and improvement of its mechanical properties such as hardness.

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Section: Introductionmentioning

confidence: 99%

Effect of aging heat treatment on the microstructure and hardness of a serviced ZHS32 superalloy

Shademani

Zadeh

Rahimipour

et al. 2019

Micro & Nano Letters

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“…Many modern works [1][2][3][4][5][6][7] inves tigate the effect of barothermal treatment (BTT) on the formation of the γ' phase and the evolution of the morphology and chemical composition of carbides and the crystal structure of high temperature alloys due to dynamic development of hot isostatic pressing (HIP) of nickel superalloys. These works analyze a change in the morphology of γ' particles [1,6,7] and the morphology and composition of carbides [5] in nickel superalloys. The crystal structures of these alloys were studied by X ray diffraction (XRD) [2,3].…”

Section: Introductionmentioning

confidence: 99%

Synchrotron X-ray diffraction analysis of a cast nickel alloy after barothermal action

Падалко

Yur'ev

Zubarev³

et al. 2011

Russ. Metall.

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Synchrotron X ray diffraction analysis of a nickel superalloy subjected to barothermal treatment (BTT) at 1235, 1260, and 1320°C is performed using a high power synchrotron radiation source. The alloy is found to contain two types of γ' phase and two types of γ solid solution, which are likely to be located in dendrite arms and the interdendritic space, respectively. The averaged lattice misfits of the γ' phases and the γ solid solutions change with the BTT temperature at a constant pressure and exposure time, which substan tially affects the high temperature characteristics of the alloy.

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Transformation in metal materials during hot isostatic pressing

Падалко

Baklan

2012

Inorg Mater

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Precipitation of the γ′ phase in a nickel alloy under conditions of static barothermal treatment

Cited by 3 publications

References 2 publications

Effect of aging heat treatment on the microstructure and hardness of a serviced ZHS32 superalloy

Effect of aging heat treatment on the microstructure and hardness of a serviced ZHS32 superalloy

Synchrotron X-ray diffraction analysis of a cast nickel alloy after barothermal action

Transformation in metal materials during hot isostatic pressing

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