The effect of the chemical composition of steel on the structural stability of the metal of the thermal impact zone

Poletaev, Yu. V.; Shchepkin, V. V.

doi:10.52177/2071-5234_2021_03_25

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2023

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“…When carrying it out, the influence of the main structural and mechanical factors should be taken into account: the initial defectiveness of the material; stability of the structure and properties during operation; type of stress state; operating conditions, etc. [2]. When choosing steel, only "classical" methods for assessing heat resistance (long-term strength, ductility, creep limit) can lead to premature equipment failure and accidental consequences.…”

Section: Introductionmentioning

confidence: 99%

Experimental methods for assessing the propensity of welded joints to local fault

Poletaev

Shchepkin²

2023

E3S Web of Conf.

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The problem of increasing the resistance of welded joints of power equipment against local destruction in the conditions of non-stationary mode of high-temperature operation is relevant. In the studies performed, the analysis of the causes and nature of LR was carried out from the standpoint of classical physics of high-temperature deformation and intergrain destruction by the creep mechanism. Most of the test methods developed simulate just such loading conditions. However, the most objective assessment of the susceptibility of the welded joints to LR can be given by the method of testing welded joints under conditions of high-temperature low-frequency low-cycle loading.

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Section: Introductionmentioning

confidence: 99%