The deformation and the recrystallization initiation in the dendrite core and interdendritic regions of a directionally solidified nickel-based superalloy

Wang, Luo; Jiang, Wenping; Lou, Langhong

doi:10.1016/j.jallcom.2014.12.135

Cited by 14 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 20,21 ] The high distortion energy was accumulated that promoted the priority formation of recrystallization core in the inter‐dendrite region. [ 22 ]…”

Section: Resultsmentioning

confidence: 99%

Microstructural Evolution during Homogenization and Hot Deformation for As‐Cast H13 Steel

Han

Ren

et al. 2020

steel research int.

View full text Add to dashboard Cite

The hot compression experiments are accomplished to investigate the microstructural evolution of as‐cast H13 steel during homogenization treatment and hot deformation. At a certain homogenization temperature, the dynamic recrystallization (DRX) volume fraction increases with increasing strain and deformation temperature and decreasing strain rate. However, the DRX is also easy to proceed at a high strain rate of 5 s−1 due to the high shear stress. The recrystallization is inhibited in a dendrite segregation region. The residual dendrite segregation left after homogenization treatment will improve the recrystallization nucleation rate during the subsequent deformation. The recrystallization grains preferentially nucleate in the dendrite region, and the grain growth is inhibited by the dendrite segregation. The partial homogenization before deformation is beneficial to achieve the fine microstructure.

show abstract

“…[ 20,21 ] The high distortion energy was accumulated that promoted the priority formation of recrystallization core in the inter‐dendrite region. [ 22 ]…”

Section: Resultsmentioning

confidence: 99%

Microstructural Evolution during Homogenization and Hot Deformation for As‐Cast H13 Steel

Han

Ren

et al. 2020

steel research int.

View full text Add to dashboard Cite

show abstract

“…With an increased β, the inclined γ phases exhibit a three-dimensional cubic morphology, as shown in Figure 9b-c. According to Nes et al [63,64], the pinning force exerted by these coherent particles can be described as follows:…”

Section: Growth Behavior Of Srx In Dendrite and Interdendritic Regionsmentioning

confidence: 99%

“…According to the above formula, it can be inferred that the pinning force exerted by γ′ phases in interdendritic regions is larger than that in dendrite core regions. For the sample with a β of 4.7°, the value of 𝑟 is 0.46 According to Nes et al [63,64], the pinning force exerted by these coherent particles can be described as follows:…”

Section: Growth Behavior Of Srx In Dendrite and Interdendritic Regionsmentioning

confidence: 99%

Effects of Crystal Orientation and External Stress on the Static Recrystallization Behavior of an Ni-Based Single-Crystal Superalloy

Xu,

Lin,

et al. 2024

Materials

View full text Add to dashboard Cite

The deformation mechanism and static recrystallization (SRX) behavior of an Ni-based single-crystal superalloy are investigated. Indentation tests were performed to investigate the effects of crystal orientation and external stress on SRX behavior. Following solution heat treatment, the depth of the SRX layer below the indentation increases with a deviation angle (β) from the [001] orientation. The slip analysis indicates that an increased deviation angle leads to an increase in the resolved shear stress on the slip plane and a decrease in the number of active slip systems. In addition, the variation pattern of the SRX layer depth with the deviation angle is consistent for different external stresses. The depth of the SRX layer also increases with external stress. The coarse γ′ phases and residual γ/γ′ eutectics obviously enhance the pinning effects on the expansion of recrystallized grain boundaries, resulting in slower growth rates of the recrystallized grains in interdendritic regions than those in dendrite core regions.

show abstract

“…For plastically deformed superalloy, the load applied to the superalloy contains a part of deformation energy in the form of dislocations, which is also the driving force for recrystallization during heating [29] . Recrystallization is formed only when the driving force is higher than the critical value which can be expressed as [30] :…”

Section: Nucleation and Growth Of Recrystallizationmentioning

confidence: 99%

Evolution mechanism of recrystallization in a nickel-based single crystal superalloy under various cooling rates during heat treatment

Wang

Yang

et al. 2022

China Foundry

View full text Add to dashboard Cite

Nickel-based single crystal (SX) superalloy is widely used in aero-engine turbine blades due to its excellent high-temperature performance and comprehensive performance [1] . It is well known that residual stresses generated during the removal of shell and cores can easily cause the formation of recrystallization layer on the surface of SX superalloy during heat treatment [2][3][4][5][6] . Due to the introduction of new grain boundaries (GBs) caused by the formation of recrystallization, the mechanical properties of SX superalloy are significantly decreased [7][8][9][10][11][12] . Jo et al. [7] reported that the early initiation of surface cracks in recrystallized specimens at 982 °C and 240 MPa could reduce creep life. Meng et al. [13]

show abstract

The deformation and the recrystallization initiation in the dendrite core and interdendritic regions of a directionally solidified nickel-based superalloy

Cited by 14 publications

References 18 publications

Microstructural Evolution during Homogenization and Hot Deformation for As‐Cast H13 Steel

Microstructural Evolution during Homogenization and Hot Deformation for As‐Cast H13 Steel

Effects of Crystal Orientation and External Stress on the Static Recrystallization Behavior of an Ni-Based Single-Crystal Superalloy

Evolution mechanism of recrystallization in a nickel-based single crystal superalloy under various cooling rates during heat treatment

Contact Info

Product

Resources

About