Study on Recrystallization Initiation Model and Microstructure Evolution Mechanism of 18CrNimo7-6 Steel During Hot Deformation

Xie, Yikui; Chen, Zikun; Zhu, Quing; Wang, Qicheng; Liu, Hui; Wang, Zhongying

doi:10.1007/s12666-022-02862-5

Cited by 1 publication

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References 30 publications

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“…These subgrain boundaries continue to absorb dislocations and eventually transform into HAGBs. [32,33] The {111} pole figure of Figure 9b shows the relationship between the grains and the parent region, and it is found that the recrystallized grains rotate at a certain angle relative to the parent region along a certain axis.…”

Section: It Was Shown That Ddrx and Cdrx Of Nickel-based Superalloys ...mentioning

confidence: 99%

Dynamic Recrystallization Mechanisms of As‐Extruded GH4151 Alloy during Hot Deformation

Jia,

Wang,

Zhang

et al. 2023

Adv Eng Mater

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The new nickel‐based superalloy has a higher content of γ' strengthening phase, resulting in complex microstructure evolution during the hot forming process of the alloy. Thus the microstructure and properties are difficult to control, stable processing and forming cannot be achieved. Therefore, this paper investigates the effect of different deformation strains on the microstructure evolution and deformation mechanism of as‐extruded GH4151 nickel‐based superalloy using isothermal hot compression. As a result, the average grain size decreases with the increase of deformation, and the proportion of Σ3 boundaries tends to decrease and then increase with the increase of dynamic recrystallization (DRX) grain volume fraction, indicating that the presence of twins has a facilitating effect on the nucleation of DRX. In addition, discontinuous dynamic recrystallization (DDRX) and continuous dynamic recrystallization (CDRX) coexist during hot deformation, and DDRX is the main nucleation mechanism. CDRX is easy to occur at middle strain, and its nucleation mode is subgrain rotation nucleation. And there are two types of nucleation for DDRX: grain boundary bulging nucleation and twin‐assisted nucleation.This article is protected by copyright. All rights reserved.

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Section: It Was Shown That Ddrx and Cdrx Of Nickel-based Superalloys ...mentioning

confidence: 99%

Dynamic Recrystallization Mechanisms of As‐Extruded GH4151 Alloy during Hot Deformation

Jia,

Wang,

Zhang

et al. 2023

Adv Eng Mater

View full text Add to dashboard Cite

show abstract

Study on Recrystallization Initiation Model and Microstructure Evolution Mechanism of 18CrNimo7-6 Steel During Hot Deformation

Cited by 1 publication

References 30 publications

Dynamic Recrystallization Mechanisms of As‐Extruded GH4151 Alloy during Hot Deformation

Dynamic Recrystallization Mechanisms of As‐Extruded GH4151 Alloy during Hot Deformation

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