Residual stress measurement on welded specimen by neutron diffraction

Park, Man Jin; Yang, Hee Nam; Jang, Dong Kee; Kim, Jong Sung; Jin, Tae Eun

doi:10.1016/j.jmatprotec.2004.04.393

Cited by 54 publications

(33 citation statements)

References 4 publications

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“…Different configurations of ultrasonic equipment can be used for residual stresses measurements. Overall, waves are launched by a transmitting transducer, propagate through a region of the material, and are detected by a receiving transducer, as show in Figure 13 [122].…”

Section: Ultrasonic Methodsmentioning

confidence: 99%

Methods of measuring residual stresses in components

et al. 2012

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Residual stresses occur in many manufactured structures and components. Large number of investigations have been carried out to study this phenomenon and its effect on the mechanical characteristics of these components.Over the years, different methods have been developed to measure residual stress for different types of components in order to obtain reliable assessment. The various specific methods have evolved over several decades and their practical applications have greatly benefited from the development of complementary technologies, notably in material cutting, full-field deformation measurement techniques, numerical methods and computing power. These complementary technologies have stimulated advances not only in measurement accuracy and reliability, but also in range of application; much greater detail in residual stresses measurement is now available. This paper aims to classify the different residual stresses measurement methods and to provide an overview of some of the recent advances in this area to help researchers on selecting their techniques among destructive, semi destructive and non destructive techniques depends on their application and the availabilities of those techniques. For each method scope, physical limitation, advantages and disadvantages are summarized. In the end this paper indicates some promising directions for future developments.

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Section: Ultrasonic Methodsmentioning

confidence: 99%

Methods of measuring residual stresses in components

et al. 2012

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“…Welds in other steel structures have been measured with this neutron diffraction technique, and it is common to see hoop stresses nearly as large as the yield strength of the metal (Park et al, 2004;Nyborg, 1989, 1990;Webster et al, 1995). This suggests that thermally induced hoop stresses during welding are high enough to permanently deform the metal by a small amount.…”

Section: Discussionmentioning

confidence: 99%

Neutron Diffraction Analysis of Residual Stresses near Unannealed Welds in Anhydrous Ammonia Nurse Tanks

2014

J. Agric. Safety and Health

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Neutron diffraction analysis was employed to measure residual stresses near welds in used anhydrous ammonia nurse tanks. Tensile residual stresses contribute to stress corrosion cracking of nurse tanks, which can cause tanks to release toxic ammonia vapor. The analysis showed that tensile residual stresses were present in the tanks measured, and the magnitudes of these stresses approached the yield strength of the steel. Implications for agricultural safety and health are discussed. RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

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“…The neutron diffraction technique has been widely used in numerous research work [2][3][4][5][6][7] for the measurement of welding residual stresses due to its advantages. Basically, all three components of the residual stress can be measured non-destructively.…”

Section: Introductionmentioning

confidence: 99%

Challenges of Measuring Residual Stresses in Large Girth Welded Pipe Spools by Neutron Diffraction

Yao

Paradowska

Eren

et al. 2016

Residual Stresses 2016

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Abstract. In this paper, welding induced residual stresses in a welded API 5L X65 girth pipe spools are discussed in as-welded and in local post weld heat treated conditions. Stress measurements were carried out non-destructively using the neutron diffraction technique. For such large-scale components residual stress measurements require significant preparation and planning. First of all, a choice of stress free lattice spacing value, discussed extensively, is of great importance for the evaluation of residual strains and stresses correctly. Besides, the use of a virtual instrument (SSCANSS software) can optimize measurements for distorted or undistorted large components with or without complex details. Moreover, the well-planned "window" cut through the thickness greatly reduced measurement time. A number of points were measured across the weld, HAZ and the parent material. Measurement results showed that residual stresses in the as-welded condition was lower than the yield strength of the material, and significant relaxation was also observed in the post weld heat treated samples.

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Residual stress measurement on welded specimen by neutron diffraction

Cited by 54 publications

References 4 publications

Methods of measuring residual stresses in components

Methods of measuring residual stresses in components

Neutron Diffraction Analysis of Residual Stresses near Unannealed Welds in Anhydrous Ammonia Nurse Tanks

Challenges of Measuring Residual Stresses in Large Girth Welded Pipe Spools by Neutron Diffraction

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