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The effect of vacancy diffusion and concentration on creep crack initiation in weldment of a C(T) specimen for high Cr steel

The effect of vacancy diffusion and concentration on creep crack initiation in weldment of a C(T)... In the present paper, to investigate the effect of vacancy diffusion and concentration on creep crack initiation and growth process for weldments, the numerical analyses of diffusion and concentration of vacancy around a notch tip of C(T) specimen in the heat affected zone (HAZ) were conducted based on the proposed 𝛼 multiplication and FEM-FDM methods. As an analytical result, the vacancy diffusion and concentration behavior around a notch tip of C(T) specimen in the heat affected zone for P92 steel was found to be dominated by the distribution of multi-axiality of the stress caused by inhomogeneous property of regions of fine and coarse grains in HAZ. It is also found to be closely related to the creep damage formation and the initial direction of creep crack growth. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Strength, Fracture and Complexity iospress

The effect of vacancy diffusion and concentration on creep crack initiation in weldment of a C(T) specimen for high Cr steel

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Publisher
IOS Press
Copyright
Copyright © 2018 IOS Press and the authors. All rights reserved
ISSN
1567-2069
eISSN
1875-9262
DOI
10.3233/SFC-180217
Publisher site
See Article on Publisher Site

Abstract

In the present paper, to investigate the effect of vacancy diffusion and concentration on creep crack initiation and growth process for weldments, the numerical analyses of diffusion and concentration of vacancy around a notch tip of C(T) specimen in the heat affected zone (HAZ) were conducted based on the proposed 𝛼 multiplication and FEM-FDM methods. As an analytical result, the vacancy diffusion and concentration behavior around a notch tip of C(T) specimen in the heat affected zone for P92 steel was found to be dominated by the distribution of multi-axiality of the stress caused by inhomogeneous property of regions of fine and coarse grains in HAZ. It is also found to be closely related to the creep damage formation and the initial direction of creep crack growth.

Journal

Strength, Fracture and Complexityiospress

Published: Jan 1, 2018

References