Hot Deformation Behaviors and Microstructure Evolution in a New PM Nickel-Base Superalloy

Gao Feng Tian; Jin Wen Zou; Yu Wang; Wu Xiang Wang

doi:10.4028/www.scientific.net/AMR.278.411

Paper Titles

Evaluation of Property Scatter of Nickel Base Alloy IN 738 LC
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Analysis of the Effective and Internal Cyclic Stress Components in the Inconel Superalloy Fatigued at Elevated Temperature
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A1-L1₂ Structures in the Al-Co-Ni-Ti Quaternary Phase System
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Development of New C&W Superalloys for High Temperature Disk Applications
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Hot Deformation Behaviors and Microstructure Evolution in a New PM Nickel-Base Superalloy
p.411

Undercoolability of Superalloys and Solidification Defects in Single Crystal Components
p.417

Solidification Characteristics and as-Cast Microstructure of Rhenium-Containing Single Crystal Superalloys under High Thermal Gradient Directional Solidification
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Investigation of Freckle Formation under Various Solidification Conditions
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A Study of the Weldability of Gamma Prime Hardened Superalloys
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 278Hot Deformation Behaviors and Microstructure...

Hot Deformation Behaviors and Microstructure Evolution in a New PM Nickel-Base Superalloy

Abstract:

The hot deformation behaviors and the effect of flow stress on the microstructure were investigated for the as-HIPed and as-extruded materials in a new PM nickel-base superalloy. Under most test conditions, the as-extruded material exhibits superplastic flow because of grain growth corresponding to work hardening during deformation process, activation energy for deformation of which is 211 kJ/mol. However, activation energy of deformation for the as-HIPed material is 717 kJ/mol, because grain size is refined due to dynamic recrystallization, the reason being considered to be associated with the initial microstructure before the deformation. Based on the results of compression tests, two constitutive equations for the two materials were established using the mathematical regression; these will provide the valuable helps for predicting and controlling the deformed microstructure as well as optimizing hot-working process.

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Periodical:

Advanced Materials Research (Volume 278)

Pages:

411-416

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.278.411

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Online since:

July 2011

Authors:

Gao Feng Tian, Jin Wen Zou, Yu Wang, Wu Xiang Wang

Keywords:

Hot Deformation, Hot Isostatic Pressing (HIP), Microstructure, Nickel Base Superalloy

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