Influence of interface morphology of transition layer on the residual stresses of plasma sprayed ZrC-based coatings examined by finite element simulations

2019 ◽  
Vol 45 (10) ◽  
pp. 13037-13045 ◽  
Author(s):  
Ling-ling Xie ◽  
Liang Wang ◽  
Ya-ran Niu ◽  
Tao Liu ◽  
Wen-liang Chen ◽  
...  
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
Transition Layer ◽  
Finite Element Simulations ◽  
Interface Morphology ◽  
Plasma Sprayed

Residual Stresses in Clad Nuclear Reactor Pressure Vessel Steels: Prediction, Measurement and Reconstruction

2015 ◽  
Author(s):  
Karim Serasli ◽  
Harry Coules ◽  
David Smith
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Residual Stresses ◽  
Pressure Vessel ◽  
Nuclear Reactor ◽  
Finite Element Simulations ◽  
Reactor Pressure Vessel ◽  
Mapping Technique ◽  
Pressure Vessel Steels ◽  
Reactor Pressure

Most residual stress measurement methods are limited in terms of their stress and spatial resolution, number of stress tensor components measured and measurement uncertainty. In contrast, finite element simulations of welding processes provide full field distributions of residual stresses, with results dependent on the quality of the input conditions. Measurements and predictions are often not the same, and the true residual stress state is difficult to determine. In this paper both measurements and predictions of residual stresses, created in clad nuclear reactor pressure vessel steels, are made. The measurements are then used as input to a residual stress mapping technique provided within a finite element analysis. The technique is applied iteratively to converge to a balanced solution which is not necessarily unique. However, the technique aids the identification of locations for additional measurements. This is illustrated in the paper. The outcomes from the additional measurements permit more realistic and reliable estimates of the true residual state to be made. The outcomes are compared with the finite element simulations of the welding process and used to determine whether there is a need for additional input to the simulations.

Measurements and Finite-Element Simulations of Residual Stresses Developed in Si3N4/Ni Diffusion Bonds

2005 ◽  
Vol 88 (9) ◽  
pp. 2515-2520 ◽  
Author(s):  
M. Vila ◽  
C. Prieto ◽  
P. Miranzo ◽  
M. I. Osendi ◽  
J. M. del Rio ◽  
...  
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
Finite Element Simulations ◽  
Diffusion Bonds

Effect of Residual Forming Stresses on Fracture in ERW Pipe

2016 ◽  
Author(s):  
Ted L. Anderson ◽  
Gregory W. Brown
Keyword(s):  
Heat Treatment ◽  
Residual Stress ◽  
Finite Element ◽  
Residual Stresses ◽  
Fracture Behavior ◽  
Finite Element Simulations ◽  
Finite Element Analyses ◽  
Forming Process ◽  
Cold Expansion ◽  
The Past

Many older pipelines contain significant residual stress due to the forming process. Cold expansion or a normalizing heat treatment can virtually eliminate residual forming stresses, but these practices were less common in the past. In the absence of cold expansion or normalization, residual forming stresses can be reduced by hydrostatic testing or operating pressures, but not eliminated entirely. Residual stresses can contribute to fracture in pipelines, particularly when the material toughness is low. This article presents a series of analyses that seek to quantify the magnitude of residual forming stresses as well as their impact on pipeline integrity. The pipe forming process was simulated with elastic-plastic finite element analyses, which considered the effect of subsequent loading on relaxation of residual stresses. A second set of finite element simulations were used to quantify the effect of residual stresses on fracture behavior.

Sign in / Sign up

Export Citation Format

Share Document