New Creep Deformation Concept Based on Creep under Lower Stresses

Takashi Matsuo

doi:10.4028/www.scientific.net/MSF.638-642.2297

Paper Titles

Phase-Separation of B2 Precipitates in an Fe-Ni-Al Alloy
p.2274

Effects of Surface Recrystallization on the Microstructures and Creep Properties of Single Crystal Superalloy DD6
p.2279

Analysis of Creep Curves of Haynes 230 Superalloy
p.2285

Morphology of γ' Precipitates in Second Stage High Pressure Turbine Blade of Single Crystal Nickel-Based Superalloy after Serviced
p.2291

New Creep Deformation Concept Based on Creep under Lower Stresses
p.2297

Modeling Grain Boundary Mobility during Dynamic Recrystallization of Metallic Alloys
p.2303

Creep Behavior and Microstructure of 8Cr Oxide Dispersion Strengthened Martensitic Steel
p.2309

Microstructure Evolution in a 9%Cr Heat Resistant Steel during Creep Tests
p.2315

Dynamic Recrystallization Modeling during Hot Forging of a Nickel Based Superalloy
p.2321

HomeMaterials Science ForumMaterials Science Forum Vols. 638-642New Creep Deformation Concept Based on Creep under...

New Creep Deformation Concept Based on Creep under Lower Stresses

Abstract:

Through the analysis of many creep rate-time or creep rate-strain curves of -single phase Ni-20mass% Cr alloy single crystals with various stress axes, it was clarified that the creep deformation manners at lower stresses are drastically different to those at higher stresses. These creep features at lower stresses are summarized into three ones as follows. (i) The fully extended transient stage occupies the considerable ratio of rupture life. (ii) The steady state stage disappears, because the transient stage directly connected with the accelerating stage. (iii) The origin of the onset of accelerating stage is regarded as the formation of the dynamic recrystallized grain. These difference in creep deformation manner were caused by the predominant operation of the primary slip system and then the homogeneous evolution of dislocation substructures.

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Periodical:

Materials Science Forum (Volumes 638-642)

Pages:

2297-2302

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.638-642.2297

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Cite this paper

Online since:

January 2010

Authors:

Takashi Matsuo

Keywords:

Creep Deformation, Dynamic Recrystallization (DRX), Schmidt Factor, Single Crystal, Stress Axis, Transient Stage

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