Evaluation of Through-Thickness Residual Stresses by Neutron Diffraction and Finite-Element Method in Thick Weld Plates

Abstract

Through-thickness distributions of the welding residual stresses were studied in the range of 50–100 mm thick plates by using finite-element modeling (FEM) and neutron diffraction measurements. In order to simulate the residual stresses through the thickness of the thick weld joints, this paper proposes a two-dimensional generalized plane strain (GPS) finite-element model coupled with the mixed work hardening model. The residual stress distributions show mostly asymmetric parabola profiles through the thickness of the welds and it is in good correlation with the neutron diffraction results. Both the heat input and plate thickness have little influence on the residual stress distributions due to the relatively large constraints of the thick specimen applied for each welding pass. A general formula has been suggested to evaluate the distributions of the through-thickness residual stresses in thick welds based on FEM and neutron diffraction experimental results.

Experimental studies of the magneto-mechanical memory (MMM) technique using permanently installed magnetic sensor arrays

“…applying the load, plastic deformation and residual stress were generated around the notches. We have confirmed the presence of residual stresses of the order of 200 MPa predicted by finite element (FE) simulations via neutron diffraction measurements[49].…”

Influence of Stress on Kinetics and Transformation Plasticity of Ferrite Transformation Based on Hysteresis Effects

“…In recent years, with the growing problem of residual stress in the welding and quenching process, the research on transformation plasticity and kinetics has gradually shifted from theoretical research to application [13][14][15]. Transformation plasticity has been already formulated in a system of constitutive equations, integrated in the commercial software for predicting the residual stress distribution [16,17].…”

A Study on Microstructure, Residual Stresses and Stress Corrosion Cracking of Repair Welding on 304 Stainless Steel: Part I-Effects of Heat Input

“…Although many careful investigations were performed on as-weld joint [25][26][27][28], there are few studies on the residual stresses and SCC behavior of repair welding joint by experiment. The repair welding usually increases the residual stress of the local repair welding area, and it has a certain influence on the mechanical property, SCC behavior, and service life of the repaired area.…”