Residual stress in weldments

Webster, G. A.; Wimpory, R.C.

doi:10.1080/10238160108200153

Cited by 20 publications

(13 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7 and show the transverse pro®les found at different depths from the specimen's upper surface. It is important to note that residual stresses in ND and TD are almost unaffected by the slicing process, as has been shown by conventional neutron diffraction experiments on another slice of the weld (Webster & Wimpory, 2001). The residual stresses shown in Fig.…”

Section: Application: Imaging a 0 For A Ferritic Weldsupporting

confidence: 55%

Mapping of unstressed lattice parameters using pulsed neutron transmission diffraction

et al. 2002

View full text Add to dashboard Cite

Stress measurement by neutron diffraction depends critically on knowledge of the unstressed lattice parameter (a0) of the specimen under study. As a result, measurement of stress profiles in components where a0 is not homogeneous throughout the sample, such as welds or carburized surfaces, can be particularly difficult. An efficient solution to this problem is proposed based on the pulsed neutron transmission diffraction technique. This technique exploits the sharp steps in intensity, the so‐called Bragg edges, appearing in the transmitted neutron spectra of polycrystalline materials, such steps being produced by coherent scattering from lattice planes. The position of these Bragg edges as defined by the time‐of‐flight technique is used to determine precisely local interplanar distances. In this work it is shown that the unstressed lattice parameter of thin specimens subjected to plane stress fields can be defined by recording transmission spectra at different sample inclinations, in complete analogy with the sin2ψ technique used in X‐ray diffraction. Moreover, by using an array of detectors it is possible to produce a radiographic `image' of a0 for plane specimens or thin sections out of three‐dimensional ones. The capability of the technique is exemplified by mapping the changes in a0 for a ferritic weld that was used as a round robin sample in an international program for standardization of stress measurements by neutron diffraction.

show abstract

Section: Application: Imaging a 0 For A Ferritic Weldsupporting

confidence: 55%

Mapping of unstressed lattice parameters using pulsed neutron transmission diffraction

et al. 2002

View full text Add to dashboard Cite

show abstract

“…The direct measurements [2] can be either destructive (e.g., hole drilling [11,12]) or nondestructive, such as: X-ray (laboratory or synchrotron) or neutron diffraction [13][14][15][16] and ultrasonic [17,18] neutron diffraction is outstanding in its ability to obtain residual stresses non-destructively within the interior of components, in three dimensions, in small test volumes (down to 1 mm × 1 mm × 1 mm) and in thick specimens (up to several cm).…”

Section: Introductionmentioning

confidence: 99%

A neutron diffraction study of residual stress due to welding

Paradowska

Price

Ibrahim

et al. 2005

Journal of Materials Processing Technology

View full text Add to dashboard Cite

“…The direct measurements (Jang et al, 2003) can be either destructive (e.g., indentation: Pang et al, 2003 or hole drilling: Hauk, 1997) or nondestructive (Hauk, 1997) including X-ray (laboratory or synchrotron: Bahadur et al, 2004), neutron diffraction (Lorentzen and Ibso, 1995;Webster et al, 2002;Albertini et al, 1997;Webster and Wimpory, 2001), magnetic Barkhausen noise and ultrasonic (Chu et al, 1986;Duquennoy et al, 2001). Numerical techniques to estimate residual stresses have also been developed prosperously (Taljat et al, 1998;Zhu and Chao, 2004) owing to the advancement of finite element approaches (Brust and Zhang, 1997;Veiga et al, 2003;Pathak and Datta, 2004).…”

Section: Introductionmentioning

confidence: 99%

Comparison of residual stress in relaxed and non-relaxed weldments of steel plates

Kuo

Yang

2016

Int J Steel Struct

View full text Add to dashboard Cite

In this study, two methods, X-ray diffraction (nondestructive) and hole-drilling (destructive) are applied to measure the residual stress of gas metal arc welded steel plate. Both non-relaxed and relaxed (local heating, furnace annealing and bead blasting) weldments are examined to understand the residual stress distributions before and after elimination of residual stresses. Results show that the heat affected zone of gas metal arc welding method is about 10 mm from the weld centerline. The local heating method is very effective in reducing the residual stress caused by the cold work of the original steel plate. The furnace annealing method reduces the residual stress to compressive but not uniformly distributed. The detrimental fluctuation of residual stress is successfully reduced and uniformly relaxed to be beneficially compressive in the bead blasting. Most importantly, X-ray diffraction shows more precise and better handling than hole-drilling method in terms of data error.

show abstract

Residual stress in weldments

Abstract: Reprints available directly from the publisherPhotocopying permitted by license only 0 2001 OPA (Overseas Publishen Association) N.V. Published by license under the Harwood Academic Publishers imprint. part of Gordon and Breach Publishing a member of the Taylor & Francis Group.

Cited by 20 publications

References 6 publications

Mapping of unstressed lattice parameters using pulsed neutron transmission diffraction

Mapping of unstressed lattice parameters using pulsed neutron transmission diffraction

A neutron diffraction study of residual stress due to welding

Comparison of residual stress in relaxed and non-relaxed weldments of steel plates

Contact Info

Product

Resources

About