Effects of initial aging time on processing map and microstructures of a nickel-based superalloy

Wen, Dong-Xu; Lin, Y.C.; Chen, Jian; Deng, Jiao; Chen, Xiaomin; Zhang, Jinlong; He, Min

doi:10.1016/j.msea.2014.10.031

Cited by 110 publications

(54 citation statements)

References 73 publications

(113 reference statements)

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“…Generally, the high density twin band acts as the source of flow localization and adiabatic shear band in the low stacking fault energy material deformed under low deformation temperature or high strain rate condition [72], which is corresponding with the microstructure observation results. The similar reports has also been made in Ti-15-3 titanium alloy [73], 22Cr-19Ni-3Mo austenitic stainless steel [74] and other nickel base superalloy [16,75,76]. As to the heterogeneous microstructure and high density twins detected by TEM, the unsafe region should be avoided in the hot working process.…”

Section: Microstructure Analysis Based On the Processing Mapsupporting

confidence: 65%

Hot deformation characteristics of Alloy 617B nickel-based superalloy: A study using processing map

Jiang

Dong

Zhang

et al. 2015

Journal of Alloys and Compounds

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Section: Microstructure Analysis Based On the Processing Mapsupporting

confidence: 65%

Hot deformation characteristics of Alloy 617B nickel-based superalloy: A study using processing map

Jiang

Dong

Zhang

et al. 2015

Journal of Alloys and Compounds

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“…In their proposed models, material constant are expressed as functions of the initial content of δ phase. On the other hand, Wen et al [25], Chen et al [26], Zhang et al [27], and Jiang et al [28] developed the processing maps of some nickel-based superalloys, and the optimized processing parameters were obtained. Besides, Lin et al [29] found that the discontinuous dynamic recrystallization plays a major role on the nucleation of dynamic recrystallization (DRX) during the hot deformation of GH4169 superalloy.…”

Section: Introductionmentioning

confidence: 99%

Study of Flow Softening Mechanisms of a Nickel-Based Superalloy With Δ Phase

Lin

Chen

et al. 2016

Archives of Metallurgy and Materials

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The flow softening behaviors of a nickel-based superalloy with δ phase are investigated by hot compression tests over wide ranges of deformation temperature and strain rate. Electron backscattered diffraction (EBSD), optical microscopy (OM), and scanning electron microscopy (SEM) are employed to study the flow softening mechanisms of the studied superalloy. It is found that the flow softening behaviors of the studied superalloy are sensitive to deformation temperature and strain rate. At high strain rate and low deformation temperature, the obvious flow softening behaviors occur. With the increase of deformation temperature or decrease of strain rate, the flow softening degree becomes weaken. At high strain rate (1s−1), the flow softening is mostly induced by the plastic deformation heating and flow localization. However, at low strain rate domains (0.001-0.01s−1), the effects of deformation heating on flow softening are slight. Moreover, the flow softening at low strain rates is mainly induced by the discontinuous dynamic recrystallization and the dissolution of δ phase (Ni3Nb).

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“…Mignanelli et al found that flow softening of the V207M nickel-based superalloy is closely related to the orientation of δ phase [28]. Wen et al stated that in the case of an appropriate initial aging time, δ phase is capable of stimulating the occurrence of dynamic recrystallization and further improving the hot formability [29]. According to the aforementioned literature, it can be concluded that γ precipitates help to enhance the mechanical properties of nickel-based superalloys at elevated temperatures, which are dependent upon the volume fraction, size, shape, and distribution of γ phase.…”

Section: Introductionmentioning

confidence: 99%

Influence of Heat Treatment on Microstructures and Mechanical Properties of NiCuCrMoTiAlNb Nickel-Based Alloy

Jiang

Sun

Zhang

et al. 2018

Metals

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Abstract:As-cast NiCuCrMoTiAlNb nickel-based alloys were subjected to two-stage heat treatment, including solution treatment and subsequent aging treatment. Furthermore, the influence of heat treatment on microstructures and mechanical properties of NiCuCrMoTiAlNb nickel-based alloys was further investigated. The as-cast NiCuCrMoTiAlNb Ni-based alloys are able to experience large plastic deformation at room temperature, where nanocrystalline phases are induced. In the case of heat-treated NiCuCrMoTiAlNb nickel-based alloys, with increasing Nb content, plenty of Ni 3 (Al, Ti) precipitates (γ phases) are distributed in the γ matrix and they are able to become the obstacles to impede the movement of dislocations, which is responsible for increasing the yield strength of NiCuCrMoTiAlNb nickel-based alloys. Pile-up of dislocations in the vicinity of γ precipitates adversely influences plasticity of NiCuCrMoTiAlNb nickel-based alloys.

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Effects of initial aging time on processing map and microstructures of a nickel-based superalloy

Cited by 110 publications

References 73 publications

Hot deformation characteristics of Alloy 617B nickel-based superalloy: A study using processing map

Hot deformation characteristics of Alloy 617B nickel-based superalloy: A study using processing map

Study of Flow Softening Mechanisms of a Nickel-Based Superalloy With Δ Phase

Influence of Heat Treatment on Microstructures and Mechanical Properties of NiCuCrMoTiAlNb Nickel-Based Alloy

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