skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Study on the residual stress relaxation in girth-welded steel pipes under bending load using diffraction methods

Journal Article · · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
 [1];  [2];  [3];  [2];  [3]
  1. Braunschweig Univ. of Technology (Germany). Institute of Joining and Welding Langer Kamp
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Braunschweig Univ. of Technology (Germany). Institute of Joining and Welding Langer Kamp
+ Show Author Affiliations

This research is dedicated to the experimental investigation of the residual stress relaxation in girth-welded pipes due to quasi-static bending loads. Ferritic-pearlitic steel pipes are welded with two passes, resulting in a characteristic residual stress state with high tensile residual stresses at the weld root. Also, four-point bending is applied to generate axial load stress causing changes in the residual stress state. These are determined both on the outer and inner surfaces of the pipes, as well as in the pipe wall, using X-ray and neutron diffraction. Focusing on the effect of tensile load stress, it is revealed that not only the tensile residual stresses are reduced due to exceeding the yield stress, but also the compressive residual stresses for equilibrium reasons. Furthermore, residual stress relaxation occurs both parallel and perpendicular to the applied load stress.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1346663
Journal Information:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Vol. 688; ISSN 0921-5093
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

References (16)

Relaxation of Residual Stresses by Annealing or Mechanical Treatment book January 1987
Reliability assessment of underground pipelines under the combined effect of active corrosion and residual stress journal February 2006
A literature survey on the stability and significance of residual stresses during fatigue journal March 2007
Characterisation of Residual Stress Relaxation in Fatigue Loaded Welded Joints by X-Ray Diffraction and Barkhausen Noise Method journal May 2000
Welding residual stress behavior under mechanical loading: HENRY GRANJON PRIZE COMPETITION 2012 Winner Category C: Design and Structural Integrity journal February 2013
Mechanisms of Residual Stress Relaxation and Redistribution in Welded High-Strength Steel Specimens under Mechanical Loading journal November 2010
Effects of residual stresses and compressive mean stresses on the fatigue strength of longitudinal fillet-welded gussets journal January 2016
Residual Stress Calculations And Measurements — Review And Assessment Of The Iiw Round Robin Results journal September 2012
Validated residual stress profiles for fracture assessments of stainless steel pipe girth welds journal April 2007
A full-field residual stress estimation scheme for fitness-for-service assessment of pipe girth welds: Part I – Identification of key parameters journal February 2015
Residual Stresses in Multi-Pass Butt-Welded Tubular Joints journal August 2014
Residual stresses in multi-pass butt-welded ferritic-pearlitic steel pipes journal February 2015
A Correction for the   1   2 Doublet in the Measurement of Widths of X-ray Diffraction Lines journal July 1948
Smoothing and Differentiation of Data by Simplified Least Squares Procedures. journal July 1964
Residual stress determination in a dissimilar weld overlay pipe by neutron diffraction journal October 2011
Study on the near-surface residual stress state in butt-welded pipes of austenitic steel using X-ray diffraction journal September 2016

Cited By (3)

Current capabilities of the residual stress diffractometer at the high flux isotope reactor journal September 2018
Micromechanism of Cold Deformation of Two-Phase Polycrystalline Ti–Al Alloy with Void journal January 2019
FE analysis of the residual stresses for the laser welded T-joint of Al-Li alloy under service loads journal July 2019

Similar Records

Related Subjects

36 MATERIALS SCIENCE
X-ray diffraction
Neutron scattering
Steel
Welding
Residual stresses