Prediction of Strength Reduction Factor for Welded Joints of Rediction of Strength Reduction Factor for Welded Joints of Turbines With Ultra Supercritical Steam Parameters Urbines With Ultra Supercritical Steam Parameters

Lanin, A. A.; Il'in, S. A.; Прохорова, Т. В.; Reva, V. V.

doi:10.24223/1999-5555-2017-10-3-223-231

Cited by 4 publications

(2 citation statements)

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“…Its geometry and softening ratio depend on the heat input, cooling time and chemical composition of the welded material [ [11], [12]]. Varying these parameters and obtaining soft zones of different sizes and forms, several investigations were made by authors in papers [ [13]- [19]]. Most of researchers focused on the impact of relative thickness of the soft zone χ sz (ratio of soft zone width w SZ to sample thickness b) on static tensile strength of welded joints.…”

Section: Introductionmentioning

confidence: 99%

Influence of the scale effect on the constraint effect in welded joints with soft interlayers

Valerievich

Zhgut

Viktorovich

et al. 2023

Int J Adv Manuf Technol

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The in uence of the scale effect on the strength of mechanically inhomogeneous welded structures with a soft zone was studied. The investigated welded samples were made of two 12Kh18N10T austenitic steel plates and a low-carbon ferritic insert connected between them by two dissimilar welded joints performed by electron beam welding. Tensile strength as a function of relative thickness for tensile specimens with a thickness of 1.2 to 10 mm was plotted. It was shown that with a relative thickness of the soft zone in the range from 0.2 to 0.5, the scale effect did not manifest during tension. This can be explained by low plastic compressive deformations in the soft zone after heat treatment, which typically leads to a decrease in the constraint effect due to the Bauschinger effect.

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Section: Introductionmentioning

confidence: 99%

Influence of the scale effect on the constraint effect in welded joints with soft interlayers

Valerievich

Zhgut

Viktorovich

et al. 2023

Int J Adv Manuf Technol

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“…Nowadays, the most widely studied parameter is the relative width of the soft zone χSZ equaled to the ratio of the soft layer width to the thickness of the welded product. Referring to the experimental and numerical studies in [6][7][8][9][10][11] it can be seen that the significant contribution of the constraint effect to the strength characteristics is possible only if the relative width of the SZ does not exceed a certain threshold value. For example, following on from the study of W. Maurer et al [10], the threshold value constituted to 0.25, while F. Hochhauser et al [9] set this value equal to 0.33.…”

Section: Introductionmentioning

confidence: 99%

Influence of the scale factor on the mechanical properties of heterogeneous welded joints

Terentyev

Gudenko²,

Zhgut³

et al. 2022

J. Phys.: Conf. Ser.

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The influence of the scale factor on the strength properties of welded products with pronounced mechanical inhomogeneity presented in the formation of a soft zone was investigated. Dissimilar welded joints were performed by electron beam welding and consisted of 12Kh18N10T austenitic steel and low-carbon ferritic steel. Interrelation of the ultimate tensile strength of the welded joints and the relative width of the soft zone was obtained for samples of three different scale levels. The growth in strength properties with a proportional decrease in the dimensions of the welded products was indicated.

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Influence of the welding parameters on the weld metal mechanical heterogeneity of EP517 (Fe12Cr2NiMoWVNb) steel and 36NKhTYu (Fe36Ni12Cr3TiAl) alloy dissimilar welded joints

Borodavkina

Terentyev

Слива

et al. 2021

J. Phys.: Conf. Ser.

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The article presents the results of assessing the effect of the welding speed and the displacement of the electron beam relative to the joint on the mechanical heterogeneity of the weld metal of dissimilar welded joints of EP517 (Fe12Cr2NiMoWVNb) steel and 36NKhTYu (Fe36Ni12Cr3TiAl) alloy. Aging curves are plotted for the weld metal of welded joints made at electron beam welding (EBW) speeds of 30 m/h and 120 m/h, as well as for the weld metal of the welded joint made at a speed of 30 m/h with various electron beam displacements. An assessment of the change in the mechanical heterogeneity of the weld metal was carried out by the change in the standard deviation of the hardness values, and metallographic studies were also carried out. It was found that a decrease in the EBW speed leads to a decrease in the standard deviation of the results of measuring the hardness of the weld metal after aging from 45 to 14 HV5 or from 18% to 6%. It was also found that an increase in the displacement of the electron beam to alloy 36NKhTYu (Fe36Ni12Cr3TiAl) to 60% leads to an increase in the hardness of the weld metal from 225 to 305 HV5 (by 35%).

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Prediction of Strength Reduction Factor for Welded Joints of Rediction of Strength Reduction Factor for Welded Joints of Turbines With Ultra Supercritical Steam Parameters Urbines With Ultra Supercritical Steam Parameters

Cited by 4 publications

References 0 publications

Influence of the scale effect on the constraint effect in welded joints with soft interlayers

Influence of the scale effect on the constraint effect in welded joints with soft interlayers

Influence of the scale factor on the mechanical properties of heterogeneous welded joints

Influence of the welding parameters on the weld metal mechanical heterogeneity of EP517 (Fe12Cr2NiMoWVNb) steel and 36NKhTYu (Fe36Ni12Cr3TiAl) alloy dissimilar welded joints

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