Simulation of Hot Isostatic Pressing in a single crystal Ni‐base superalloy with the theory of continuously distributed dislocations combined with vacancy diffusion

The evolution of microporosity in single-crystal nickel-base superalloy CMSX-4 during hot isostatic pressing has been investigated by high resolution tomography at the European Synchrotron Radiation Facility in Grenoble. The kinetic dependencies of microporosity annihilation in the superalloy in initially as-cast and homogenized conditions were obtained. It was shown that smaller homogenization pores of about 5-10 μm in size are rapidly annihilate during hot isostatic pressing, while annihilation of larger solidification pores of size up to a few hundred micrometer takes a long time. After commercial hot isostatic pressing at 1288 °C, 103 MPa, 4 h only rare pores smaller than 20 μm remain, which are not critical for fatigue strength.

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Pore annihilation in a single-crystal nickel-base superalloy during hot isostatic pressing: Experiment and modelling

Materials Science and Engineering A ◽

10.1016/j.msea.2013.08.034 ◽

2013 ◽

Vol 586 ◽

pp. 342-349 ◽

Cited By ~ 19

Author(s):

Alexander Epishin ◽

Bernard Fedelich ◽

Thomas Link ◽

Titus Feldmann ◽

Igor L. Svetlov

Keyword(s):

Single Crystal ◽

Hot Isostatic Pressing ◽

Nickel Base Superalloy ◽

Isostatic Pressing ◽

Nickel Base ◽

Base Superalloy

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Dislocations interacting with a pore in an elastically anisotropic single crystal nickel-base superalloy during hot isostatic pressing

Computational Materials Science ◽

10.1016/j.commatsci.2021.111118 ◽

2022 ◽

Vol 204 ◽

pp. 111118

Author(s):

A. Ruffini ◽

Y. Le Bouar ◽

A. Finel ◽

A.I. Epishin ◽

B. Fedelich ◽

...

Keyword(s):

Single Crystal ◽

Hot Isostatic Pressing ◽

Nickel Base Superalloy ◽

Isostatic Pressing ◽

Nickel Base ◽

Base Superalloy

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Refinement and Experimental Validation of a Vacancy Model of Pore Annihilation in Single-Crystal Nickel-Base Superalloys During Hot Isostatic Pressing

SSRN Electronic Journal ◽

10.2139/ssrn.3751560 ◽

2020 ◽

Author(s):

Alexander Epishin ◽

Bettina Camin ◽

Lennart Hansen ◽

Marek Heuser ◽

Inmaculada Lopez-Galilea ◽

...

Keyword(s):

Single Crystal ◽

Experimental Validation ◽

Hot Isostatic Pressing ◽

Isostatic Pressing ◽

Vacancy Model ◽

Nickel Base Superalloys ◽

Nickel Base

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Optimization of the homogenization and hot isostatic pressing heat treatments of a fourth generation single crystal superalloy

MATEC Web of Conferences ◽

10.1051/matecconf/20141413002 ◽

2014 ◽

Vol 14 ◽

pp. 13002 ◽

Cited By ~ 3

Author(s):

Pierre Caron ◽

Catherine Ramusat

Keyword(s):

Single Crystal ◽

Hot Isostatic Pressing ◽

Heat Treatments ◽

Single Crystal Superalloy ◽

Fourth Generation ◽

Isostatic Pressing

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Effect of Hot Isostatic Pressing on the Microstructure of Single Crystal Ni-Based Superalloy DD10

Materials Science Forum ◽

10.4028/www.scientific.net/msf.747-748.772 ◽

2013 ◽

Vol 747-748 ◽

pp. 772-776

Author(s):

Li Jun Liu ◽

Ming Xue ◽

Jing Yang Chen ◽

La Mei Cao

Keyword(s):

Electron Microscope ◽

Single Crystal ◽

Interdendritic Region ◽

Hot Isostatic Pressing ◽

Optical Microscope ◽

Dendrite Core ◽

Dendritic Segregation ◽

Third Generation ◽

Isostatic Pressing ◽

Scanning Electron

The effects of hot isostatic pressing on the microstructures of a third generation single crystal Ni-based superalloy DD10 were investigated by using optical microscope (OM), scanning electron microscope (SEM), electron microprobe analyzer (EPMA). The results showed that the micropores in the interdendritic region were eliminated completely after hot isostatic pressing at 1320 and 150MPa. Meanwhile, the morphology of γ precipitates changed to be more cuboidal and the distribution of γ precipitates in both dendrite core and interdendritic region became more uniform after hot isostatic pressing. Hot isostatic pressing also promoted the homogenization of the composition between dendrite core and interdendritic region and the dendritic segregation of Re, W, Al and Ta was decreased.

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