Neutron Diffraction Investigation of Residual Stresses Induced in Niobium-Steel Bilayer Pipe Manufactured by Explosive Welding

Taran, Yu.V.; Балагуров, А.М.; Сабиров, Б. М.; Davydov, Vadim; Venter, А.M.

doi:10.4028/www.scientific.net/msf.768-769.697

Cited by 7 publications

(4 citation statements)

References 6 publications

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“…dimensional instability during cutting or machining operations. For this reason, a number of recent investigations have been carried out with the objective of quantifying explosion welding residual stresses [7][8][9][10][11] as well as to establish appropriate stress relaxation treatments [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Residual Stress Analysis of Explosion Cladded Inconel 625 and ASME SA516-70 Carbon Steel Bimetal Plates

Varavallo

Moreira

Paes

et al. 2014

AMR

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Abstract. In the present work the explosion welded joint produced between an Inconel 625 alloy and ASTM A516-70 carbon steel plates was investigated. After welding, the cladded plates were submitted to stress relief annealing at 600 °C for 3 h. The cross section of the cladded plates was examined in both as welded and heat treated conditions by optical microscopy and scanning electron microscopy. The hardness profile across the cladded interface was measured and the residual stress state created as a consequence of the explosion welding process was determined by X-ray diffraction. The experimental results showed that the Inconel 625 alloy adhered well to the ASTM SA516-70 steel, demonstrating the viability of the explosion cladding process for producing bimetal plates of the mentioned alloys. In the as welded condition, metallography analysis indicated severe plastic deformation close to the cladded interface and a wavy morphology characteristic of high bond strength. Elevated tensile residual stresses were created as a result of the welding process and considerable stress relaxation was attained by application of the proposed heat treatment.

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Section: Introductionmentioning

confidence: 99%

Microstructure and Residual Stress Analysis of Explosion Cladded Inconel 625 and ASME SA516-70 Carbon Steel Bimetal Plates

Varavallo

Moreira

Paes

et al. 2014

AMR

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“…Mongolian Geoscientist pressure, temperature, or thermodynamic conditions is of great importance (SchäFer, 2002;Friedman, 1972). The results presented in our paper were performed on the EPSILON neutron diffractometer instrument at the IBR-2 reactor, Joint Institute for Nuclear Research, Dubna, Russia (Taran et al, 2014;Scheffzük et al, 2016). The ONYX rock sample is a trigonal crystal system low-temperature alpha-quartz.…”

Section: Original Articlementioning

confidence: 99%

Residual strain investigation of a polycrystalline quartzite rock sample using time-of-flight neutron diffraction

Badmaarag,

Sangaa,

Sikolenko

et al. 2023

Mong. geosci.

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In this work, we studied the residual micro lattice strain of an onyx sample, which is a micro- to the cryptocrystalline variety of the mineral quartz SiO2. That the investigation has been carried out using in-situ stress experiments with the time-of-flight neutron diffraction method. The aim of the study is to investigate residual lattice strains and pressure directions in the sample using time-of-flight neutron diffraction, which is a powerful tool for the study of the residual strain behavior in bulk materials, like geological rock samples containing large grains. The residual strain was detected in different sample directions turning the sample in steps of 30° by 180° around the cylindrical z-axis. These experiments have been performed at the time-of-flight neutron strain diffractometer EPSILON, situated on the pulsed neutron source IBR-2M of the Joint Institute for Nuclear Research in Dubna, Russia. The results of this study will provide insights into the compressional and tensional residual strain of the crystallographic lattice planes, and will have implications for our understanding of the tectonic history of this region. These different strains are arranged in the sample by a sinusoidal distribution in radial directions.

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“…Existing solid-state welding methods such as brazing-welding and friction stir welding can inhibit the formation of some intermetallic compounds, so these techniques have become the most common welding methods for joining Nb to dissimilar metals. Alternatively, as reported by Jiao et al [4] and Taran et al [5], high-strength welded joints were obtained by explosive welding, however, this approach is scarcely utilized for components with complex geometric shapes. Budkin et al.…”

Section: Introductionmentioning

confidence: 99%

Laser welding of niobium to AISI 304 steel using a copper interlayer

Zhao

Shi

et al. 2020

Journal of Adhesion Science and Technology

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Cu interlayers with thicknesses of 1, 1.5, and 2 mm were used to join niobium and AISI 304 steel. Fractures occurred in the weld, the Nb base metal, and the unmelted Cu interlayer when the Cu interlayer thickness was 1, 1.5, and 2 mm, respectively. When the thickness of the Cu interlayer was 1 mm, the weld microstructure consisted of austenite with Cu-rich particles along the austenitic grain boundaries and within the austenitic grains, a compositelike structure (the Fe2Nb lamellae and particles in a γ matrix) embedded with coarse Cu globules, and a mixture of bulk Fe7Nb6, Nb-rich dendrites, and Cu matrix. The bulk brittle Fe7Nb6 phase embrittled the joint. However, when the thickness of the Cu interlayer was 1.5 mm, the weld microstructure consisted of austenite with Cu-rich precipitates along the austenitic grain boundaries and a Cu-rich phase embedded with Nb-rich particles and dendrites. Solid-solution strengthening of Cu by Fe was responsible for the improved mechanical properties of the joint. The mixture of Nb-rich particles and dendrites in the Cu matrix was also helpful in enhancing the joint strength. Furthermore, when the thickness of the Cu interlayer was 2 mm, the weld microstructure consisted of austenite with Cu-rich precipitates along the austenitic grain boundaries and within the austenitic grains, an unmelted Cu interlayer, and Nb-rich particles and dendrites embedded in a Cu matrix. The unmelted Cu interlayer reduced the joint strength.

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Neutron Diffraction Investigation of Residual Stresses Induced in Niobium-Steel Bilayer Pipe Manufactured by Explosive Welding

Cited by 7 publications

References 6 publications

Microstructure and Residual Stress Analysis of Explosion Cladded Inconel 625 and ASME SA516-70 Carbon Steel Bimetal Plates

Microstructure and Residual Stress Analysis of Explosion Cladded Inconel 625 and ASME SA516-70 Carbon Steel Bimetal Plates

Residual strain investigation of a polycrystalline quartzite rock sample using time-of-flight neutron diffraction

Laser welding of niobium to AISI 304 steel using a copper interlayer

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