Paper Title:
Creep Continuum Damage Analysis for a Pressurized Thick Wall Circumferentially Welded CrMoV Steel Pipe at 640°C
  Abstract

The failure assessment for thick wall CrMoV steel pipes circumferentially welded at 640°C was studied using the Finite Element (FE) method under close-ended, open-ended and axial compression conditions, respectively. The life and position of failure, redistribution of stress on the welds and damage variations were obtained using damage modeling. Since there is a distinct mismatch of mechanical properties in parent material, weld material and heat affect zone, variations of damage with time, stress redistribution and failure life in each zone are different. The FEM results show that the weakness of the welds is the heat-affected zone (HAZ) where the hoop stresses increase sharply in the tertiary stage of creep. The maximum of damage of the welds lies on the inner surface of in the weld zone when failure occurs. The information is useful for assessing the performance of practical service welds in power plants pipe work.

  Info
Periodical
Advanced Materials Research (Volumes 97-101)
Edited by
Zhengyi Jiang and Chunliang Zhang
Pages
922-927
DOI
10.4028/www.scientific.net/AMR.97-101.922
Citation
K. R. Jia, Z. F. Yue, "Creep Continuum Damage Analysis for a Pressurized Thick Wall Circumferentially Welded CrMoV Steel Pipe at 640°C", Advanced Materials Research, Vols. 97-101, pp. 922-927, 2010
Online since
March 2010
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Price
$32.00
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