Novel residual stress measurement technique to evaluate through thickness residual stress fields

Taraphdar, P.K.; Thakare, J.G.; Pandey, Chandan; Mahapatra, Manas Mohan

doi:10.1016/j.matlet.2020.128347

Cited by 61 publications

(23 citation statements)

References 6 publications

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“…and z directions, respectively [31,40]. The through thickness residual stress measurement is explained in detail in our earlier work [40].…”

Section: Fem Resultsmentioning

confidence: 99%

“…Residual stress is an important criterion for choosing the cladding material for nuclear applications because of severe plastic deformation processes such as rotary swaging, extrusion, the rolling process, and hot pressure torsion and dissimilar metal welding used for processing this alloy [28][29][30]. Residual stresses are measured by different methods such as, X-Ray diffraction (XRD), hole drilling and deep hole drilling, and the hole contour method and block removal [31]. XRD has the ability to measure only surface residual stresses, while semi destructive techniques like deep hole drilling are able to measure the residual stress up to 750 mm depth in the material [32].…”

Section: Introductionmentioning

confidence: 99%

“…where, ε y and ε z are measured strains in the y and z directions, respectively; ∆d y and ∆z are the change in diameters in the y and z directions, respectively; d y and d z are the initial diameters, in the y and z directions, respectively; E is Young's modulus; and σ y and σ z are the stresses in the y and z directions, respectively [31,40]. The through thickness residual stress measurement is explained in detail in our earlier work [40].…”

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confidence: 99%

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Finite Element Analysis and Experimental Evaluation of Residual Stress of Zr-4 alloys Processed through Swaging

Singh

Kalita

Narayanan³

et al. 2020

Metals

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Zirconium alloy has been extensively used as a cladding material in nuclear power reactors due to its low neutron absorption cross section, excellent mechanical properties, and corrosion resistance. The influence of the swaging parameter, feed rate (0.7, 1.25, 2 m/min) on residual stress induced in Zr-4 alloy is investigated in the present work. A three-dimensional finite element model was implemented in the Deform 3D software to simulate the rotary swaging (RS) process over a circular rod of Zr-4 alloy. The simulation results based on the 3D framework provide a detailed insight of residual stress, true stress versus true strain and force applied over the rod during the multiple pass swaging process; the results are compared with experimental results. The experimental hole drilling method is used to determine the residual stresses on swaged zirconium alloy at different feed rates (0.7, 1.25, and 2 m/min). A similar trend of residual stress between experimental and numerical results from the surface to the center on the swaged rod samples is observed. The same magnitude of residual stress at the surface of the swaged Zr-4 rod is also observed. It is found to be compressive at the surface and tensile in the center of the samples, as observed in the present work.

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“…and z directions, respectively [31,40]. The through thickness residual stress measurement is explained in detail in our earlier work [40].…”

Section: Fem Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Finite Element Analysis and Experimental Evaluation of Residual Stress of Zr-4 alloys Processed through Swaging

Singh

Kalita

Narayanan³

et al. 2020

Metals

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“…Evaluation of residual stress through mechanical strain relaxation involves the measurement of strains or displacement as a result of elastic unloading due to precisely controlled material removal. 33,34 Residual stress measurement techniques can be classified as non-destructive, semi-destructive, and entirely destructive techniques. All these techniques have their own advantages and limitations.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of through-thickness residual stresses and microstructure in SA516 Gr. 70 steel welds

Taraphdar

Mahapatra

Pradhan

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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The critical working condition of nuclear power plant equipment necessitates meticulous determination of the welding process and parameters. In this work, some major influential factors of welding were investigated to observe their effects on the through-thickness residual stress distribution in multipass pressure vessel steel welds. In this regard, experiments were conducted to find the characteristics of residual stresses dispersed in SA516 Grade 70 steel welds of different groove geometries with distinct welding conditions. Three-dimensional finite element models of the weldments were developed considering a moving heat source with temperature-dependent material properties to simulate the welding thermal cycles and corresponding residual stress fields. Effects of weld groove geometry, number of weld passes, external constraints, and preheating on the through-thickness residual stress fields were studied. Additional attention was given to the evaluation of the heterogeneous microstructure and microhardness across the weld cross-section associated with their weld thermal history. Finally, the evolution of the through-thickness residual stresses attributed to subsequent weld passes was elaborated.

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“…Recently, some advancement has been proposed in this technique to measure the through-thickness residual stress distribution with a comparatively lower degree of damage to the specimen. However, the application of this need to be explored in the thin welded components [17]. The neutron diffraction measurement technique has sufficient spatial resolution and depth penetration for many cases.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of short-length scale residual stress variations within an electron beam welded P91 Ferritic–Martensitic steel plate

Naveed

2021

Heliyon

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In this research, an electron beam (EB) butt-welded P91 steel plate (~9 mm thick) is selected to measure longitudinal residual stresses (acting in the welding direction) using a promising residual stress measurement technique -the contour method. The EB weld causes short length scale residual stresses within the narrow width of the fusion zone with steep stress gradients lateral to the weld line, which presents a new challenge for the residual stress measurements. The special measures were taken for all main steps of the technique to improve its the spatial resolution, thereby the short length scale residual stresses were captured. The success of the measurement is assessed by comparing the contour method result to the neutron diffraction result, and a good agreement were found in the results of both the techniques. These results also shows that the contour measurement results successfully captured the steep stress gradient on both sides of the weld centre-line (0 mm) with tensile stress peaks situated just 2.8 mm apart. It is one of the best resolutions in residual stress length-scale in this component achieved in contour measurements.

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Novel residual stress measurement technique to evaluate through thickness residual stress fields

Cited by 61 publications

References 6 publications

Finite Element Analysis and Experimental Evaluation of Residual Stress of Zr-4 alloys Processed through Swaging

Finite Element Analysis and Experimental Evaluation of Residual Stress of Zr-4 alloys Processed through Swaging

Evaluation of through-thickness residual stresses and microstructure in SA516 Gr. 70 steel welds

Characterisation of short-length scale residual stress variations within an electron beam welded P91 Ferritic–Martensitic steel plate

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