Chemical segregation and coarsening of γ′ precipitates in Ni-based superalloy during heat treatment in alternating magnetic field

Li, Chuanjun; Guo, Gui; Yuan, Zhaojing; Wang, Xuan; Xi, Li; Zhong, Yunbo; Ren, Zhongming

doi:10.1016/j.jallcom.2017.05.253

Cited by 26 publications

(4 citation statements)

References 27 publications

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“…It can be seen from the variation of Mn% that the spinodal decomposition during aging process slightly increases the Mn content in the Mn-rich region, while the magnetic field aging heat treatment slightly promotes the diffusion of Mn element, that is, the spinodal decomposition effect is somewhat inhibited in specimen 3#. Li et al found that aging at 1353 K under applied alternating magnetic field can accelerate the element diffusion in Ni-based superalloy, and then effectively reduce the chemical segregation, and thus promote the homogenisation of alloy elements [14]. The magnetic field surely exerts a negative effect on the enrichment of Mn content.…”

Section: Resultsmentioning

confidence: 99%

Tuning ultra-high damping capacity of Mn–Cu alloy to fit wide-range service temperature

Zhang

Tian

et al. 2022

Materials Science and Technology

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Mn–Cu-based damping alloy prepared by directional solidification is very promising for vibration and noise control. Aging treatment with and without application of magnetic field on the microstructure and damping performance of directionally solidified Mn–Cu alloy was studied by means of X-ray diffraction, differential scanning calorimetry, dynamic thermal mechanical analysis and scanning electron microscope. It is found that aging treatment makes the orientation shift from (200) to (111), and aging treatment under magnetic field helps Mn–Cu alloy keep high damping in the wide temperature range. The polymorphic microstructure characterised by fine twin bands with low-angle misorientation boundaries leads to a substantial increase of twin boundary internal friction up to several times higher than that of polycrystalline state.

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Section: Resultsmentioning

confidence: 99%

Tuning ultra-high damping capacity of Mn–Cu alloy to fit wide-range service temperature

Zhang

Tian

et al. 2022

Materials Science and Technology

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“…For examples, the AMF can enhance diffusivity, [17][18][19][20] refine grains, 21) accelerate stress release, 22) and reduce the macro/micro segregation. [23][24][25][26] In the aspect of heat treatment, it was found that the AMF not only could improve the microstructures and properties of some light alloys, 18,27,28) but also improve the magnetic properties of electrical steel and refine the pearlite structure. 29) More recently, the AMF was applied to treat the GCr15 bearing steel at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Spheroidizing Annealing in Combination with Alternating Magnetic Field on Microstructure and Mechanical Properties of GCr15 Bearing Steel

Chen

et al. 2022

ISIJ Int.

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Microstructures and mechanical properties after spheroidizing annealing (SA) of GCr15 bearing steel with and without an alternating magnetic field (AMF) were investigated. It was found that the application of the AMF at the austenitizing stage promoted the dissolution of carbides, accelerated the austenitizing process and increased the hardness of the quenched sample. After isothermal annealing, the carbides in the sample with an AMF more uniformly distributed and became finer in comparison with those without an AMF. The average hardness of the sample treated in the AMF was lower than that without an AMF. The phenomena could be attributed to the enhanced diffusivity in the AMF.

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“…The efficiency of aero engines and land-based gas turbines could be significantly enhanced by increasing the operating temperatures. As the service temperature increases, rapid degradation of superalloys inevitably occurs [3,9,10,[13][14][15][16][17][18]. Therefore, the design and development of novel Ni-based superalloys with better mechanical properties and oxidation resistance are needed [19].…”

Section: Introductionmentioning

confidence: 99%

Structural properties and cyclic oxidation behavior of Ni-Al-Y superalloys

Atas¹,

Yıldırım²

2022

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The microstructure, microhardness, and oxidation resistance of ternary model Ni-13Al--2Y (at.%) and Ni-11Al-4Y (at.%) superalloys were studied in detail. The microstructures of alloys consisted of primary γ-Ni dendrites and residual eutectic. The Ni17Y2 intermetallic and γ-Ni were the major constituents of the eutectic phase mixture. The microhardness value of Ni-11Al-4Y alloy was higher than that of Ni-13Al-2Y alloy because of the higher amount of relatively harder eutectic. With increasing Y concentration from 2 to 4 at.%, the mass gain, oxide scale thickness, and oxidation rate remarkably increased. For both alloys, the oxide scale was comprised of three layers: NiO as a surface layer, Al2O3 as an inner layer in the metal/oxide interface, and mixed Al/Y oxides as an internal layer. Although the studied alloys exhibited fairly good scale adherence in conjunction with almost no important scale spallation, they exhibited faster oxidation kinetics along with higher mass gains.

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Chemical segregation and coarsening of γ′ precipitates in Ni-based superalloy during heat treatment in alternating magnetic field

Cited by 26 publications

References 27 publications

Tuning ultra-high damping capacity of Mn–Cu alloy to fit wide-range service temperature

Tuning ultra-high damping capacity of Mn–Cu alloy to fit wide-range service temperature

Effect of Spheroidizing Annealing in Combination with Alternating Magnetic Field on Microstructure and Mechanical Properties of GCr15 Bearing Steel

Structural properties and cyclic oxidation behavior of Ni-Al-Y superalloys

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