Texture and microstructure evolution of Incoloy 800H superalloy during hot rolling and solution treatment

Cao, Yu; Shen, Xinjun; Di, Hongshuang; Huang, Guangjie

doi:10.1016/j.jallcom.2016.12.174

Cited by 18 publications

(7 citation statements)

References 29 publications

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“…This is because of the extremely uneven grain deformation in the initial stage of hot compression, as shown in Figure a,b. Such a texture feature is commonly seen in hot compression Ni‐based superalloys . At 1100 °C, the distribution of the texture is substantially invisible because the grains are essentially dynamic recrystallized grains at this time, and the newly formed recrystallized grains tend to deviate from their original orientation, making the orientation more dispersed.…”

Section: Resultsmentioning

confidence: 93%

“…Such a texture feature is commonly seen in hot compression Ni-based super alloys. [17,18] At 1100 C, the distribution of the texture is substantially invisible because the grains are essentially dynamic recrystallized grains at this time, and the newly formed recrystallized grains tend to deviate from their original orientation, making the orientation more dispersed. As shown in Figure 3d, a slight increase in texture with a minor deviation from the copper and brass orientations.…”

Section: Microstructure Observationmentioning

confidence: 99%

“…In the present study, the crystallographic texture of the superalloy has been characterized using neutron diffraction and electron backscatter diffraction (EBSD). For example, a report demonstrates that Goss and cube texture components contribute to <100>‐oriented grains preferentially lying along the length direction, giving rise to significant texture‐induced softening in comparison with its texture‐free counterpart (annealed Inconel 625) . Second, the hot‐rolled microstructure is mainly composed of elongated grains with typical texture components of B, Cu.…”

Section: Introductionmentioning

confidence: 99%

“…For example, a report demonstrates that Goss and cube texture components contribute to <100>-oriented grains preferentially lying along the length direction, giving rise to significant texture-induced softening in comparison with its texture-free counterpart (annealed Inconel 625). [17] Second, the hot-rolled microstructure is mainly composed of elongated grains with typical texture components of B, Cu. and S at the mid layer of plates, whereas substantial inhomogeneous fine grains can be observed between the deformation grains at the surface layer showing a combination of R-C and R-Cu components.…”

Section: Introductionmentioning

confidence: 99%

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Texture Evolution and Dislocation Behavior in a Nickel‐Based Superalloy during Hot Compression

Gao

Jia

Ji³

et al. 2019

Adv Eng Mater

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Texture evolution and dislocation behavior of Ni‐based superalloys at various temperatures and strain rate of 1 s−1 are studied using electron backscatter diffraction (EBSD) technique and transmission electron microscope (TEM). It can be concluded that no significant texture is formed at high deformation temperature, especially for the occurrence of completed dynamic recrystallization (DRX). In addition, texture weakening is easy to realize by conducting DRX process on the Ni‐based superalloys, whereas a slight strengthening is observed during grain growth. Based on the TEM images, the original grain boundary with high orientation gradient at low temperature provides an excellent position for DRX nuclei, which is strongly related with the dislocation motion. Moreover, it is concluded that the dislocation behavior plays a significant role in the plastic deformation of the Ni‐based superalloys. Herein, theoretical guidance for the application of nickel‐based superalloys and furthermore enhancement of their plastic deformation properties is provided.

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Section: Resultsmentioning

confidence: 93%

Section: Microstructure Observationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Texture Evolution and Dislocation Behavior in a Nickel‐Based Superalloy during Hot Compression

Gao

Jia

Ji³

et al. 2019

Adv Eng Mater

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“…This banding effect is formed due to rolling process. The process of rolling involves cast steel billets of appropriate size and then rolling them into plates of required thickness [33]. Hot rolling changes the coarse grain into the finer grain sizes and increases the mechanical properties [34].…”

Section: Microstructuresmentioning

confidence: 99%

Mechanical properties and microstructures of steel panels for laminated composites in armoured vehicles

Jamil

Aripin

Sajuri³

et al. 2016

Int. J. Automot. Mech. Eng.

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This paper present the study about the mechanical properties of two high strength low alloy steels for replacing the current rolled homogeneous armour (RHA) for ballistic application. High strength low alloy steel has been widely adapted as a ballistic plate in light armoured vehicle. However, the current used RHA plate is very heavy thus restricted the manoeuvrability of the armoured vehicle. The aim of this study is to find materials suitable to be used for production of composite protection panel which is lighter yet has similar mechanical properties to RHA. The tensile strength and hardness of AISI 4340 and AR500 steels were evaluated and compared to that of RHA and the results were analysed based on its chemical compositions and microstructural observation. Values of these properties are primarily reflected by its microstructures and chemical compositions. Therefore, microscopic observation of microstructural arrangement and phases are essential in understanding the hardness and stress-strain behaviour of these metals. Results indicate similar tensile properties were observed in RHA and AR500 but different properties obtained for AISI 4340. Tensile strength of RHA and AR500 were 1750 MPa and 1740 MPa respectively followed by AISI 4340 at 1020 MPa. AISI 4340 steel exhibited the highest elongation at 20.6% compared to RHA and AR500 at 13.3 and 12.5%, respectively. Higher degree of carbon content in fine martensitic structure of RHA and AR500 led to high hardness. Imperfections in RHA and AR500 were also removed by hot rolling process as indicated by white banding that cause higher in tensile strength. Retained austenite and coarse microstructure of AISI 4340 steel contributed to higher ductility compared to AR500 and RHA. Therefore the tensile properties of RHA and AR500 were found similar due to its microstructure behaviour. This similarity allows AR500 to be utilised as alternatives to RHA in armour plate application.

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Evolution of Twin Boundaries and Contribution to Dynamic Recrystallization and Grain Growth of Inconel 625

Jia

Gao

Ji³

et al. 2019

Adv Eng Mater

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Dynamic recrystallization (DRX) and grain growth behaviors of Inconel 625 alloy are investigated via hot compression test in the temperature range of 900–1200 °C and strain rate range of 0.01–10 s−1. The electron backscatter distribution technique is an effective method for identifying twin boundary evolution on the basis of temperature and strain rate; this approach is applied in this study to investigate the effects of twins on the DRX process and grain growth. The fraction of DRX increases with temperature under all strain rates, but the strain rate exerts a complex effect on DRX. Grain size variation with temperature follows a similar trend of declining and then increasing, whereas no apparent trend is observed at various strain rates. The DRX mechanism of the Inconel 625 alloy shifts from discontinuous DRX to continuous DRX with a reduction in deformation temperature and increase in strain rate. The fraction of Σ3n (n = 1, 2, 3) boundaries (twin boundaries) increases with increasing temperature at low temperatures (<1100 °C), but declines with increasing temperature at high temperatures (≥1100 °C). At low temperatures (<1100 °C), the fraction of Σ3n (n = 1, 2, 3) boundaries declines with an increasing strain rate up to 1 s−1 and then increases.

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Texture and microstructure evolution of Incoloy 800H superalloy during hot rolling and solution treatment

Cited by 18 publications

References 29 publications

Texture Evolution and Dislocation Behavior in a Nickel‐Based Superalloy during Hot Compression

Texture Evolution and Dislocation Behavior in a Nickel‐Based Superalloy during Hot Compression

Mechanical properties and microstructures of steel panels for laminated composites in armoured vehicles

Evolution of Twin Boundaries and Contribution to Dynamic Recrystallization and Grain Growth of Inconel 625

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