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

2021 ◽  
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

Models for the Porosity Growth and Dissolution in Single-Crystal Nickel-Base Superalloys

2010 ◽  
Vol 297-301 ◽  
pp. 187-192 ◽  
Author(s):  
Boris S. Bokstein ◽  
Vladimir Esin ◽  
Alexey Rodin ◽  
I.L. Svetlov
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Single Crystal ◽  
Hot Isostatic Pressing ◽  
Analytical Models ◽  
Fatigue Lifetime ◽  
Isostatic Pressing ◽  
Nickel Base Superalloys ◽  
Nickel Base

During the solidification and the homogenization of single-crystal nickel-base superalloys, pores form which lead to the degradation of the mechanical properties, especially the fatigue lifetime. Hot Isostatic Pressing (HIP) is used for the pores dissolution. In this paper, analytical models for the formation of the homogenization pores and their dissolution during the HIP are developed. The results are compared with experimental data.

scholarly journals Hot isostatic pressing of single-crystal nickel-base superalloys: Mechanism of pore closure and effect on Mechanical properties

2014 ◽  
Vol 14 ◽  
pp. 08003 ◽  
Author(s):  
Alexander I. Epishin ◽  
Thomas Link ◽  
Bernard Fedelich ◽  
Igor L. Svetlov ◽  
Evgeniy R. Golubovskiy
Keyword(s):  
Mechanical Properties ◽  
Single Crystal ◽  
Hot Isostatic Pressing ◽  
Isostatic Pressing ◽  
Pore Closure ◽  
Nickel Base Superalloys ◽  
Nickel Base

scholarly journals A Vacancy Model of Pore Annihilation During Hot Isostatic Pressing of Single Crystals of Nickel-Base Superalloys

2018 ◽  
Vol 9 (1) ◽  
pp. 57-65 ◽  
Author(s):  
A. I. Epishin ◽  
B. S. Bokstein ◽  
I. L. Svetlov ◽  
B. Fedelich ◽  
T. Feldmann ◽  
...  
Keyword(s):  
Single Crystals ◽  
Hot Isostatic Pressing ◽  
Isostatic Pressing ◽  
Vacancy Model ◽  
Nickel Base Superalloys ◽  
Nickel Base

Synchrotron 3D μ-Tomography of Porosity during Hot Isostatic Pressing of a Single-Crystal Nickel-Base Superalloy

2021 ◽  
Vol 1016 ◽  
pp. 102-106
Author(s):  
Alexander Epishin ◽  
Bettina Camin ◽  
Lennart Hansen ◽  
Jonas Schmidt
Keyword(s):  
Fatigue Strength ◽  
High Resolution ◽  
Single Crystal ◽  
Hot Isostatic Pressing ◽  
European Synchrotron Radiation Facility ◽  
Nickel Base Superalloy ◽  
Isostatic Pressing ◽  
Long Time ◽  
Nickel Base ◽  
Base Superalloy

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.

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

2013 ◽  
Vol 586 ◽  
pp. 342-349 ◽  
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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