Investigation of the Nature of Damage to Welded Flexible Compensating Elements Made of Austenitic Stainless Steels

Vitaliy Ivanov; F.V. Morgay; Elena V. Lavrova; Dmitriy P. Il’yaschenko; Elena Verkhoturova

doi:10.4028/p-8y4hve

Paper Titles

Investigation of the Operational Durability of High Pressure Metal Hoses Made of Austenitic Steels
p.1

Investigation of the Nature of Damage to Welded Flexible Compensating Elements Made of Austenitic Stainless Steels
p.9

Study on the Effects of Hydrostatic Pressure on the Structural State of Pure-Iron during Hardening Treatment with a Multiradius Roller
p.17

The Residual Stress Modeling in Surface Plastic Deformation Machining Processes with the Metal Hardening Effect Consideration
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Resource Saving in Technologies of Extraction and Processing of Ores for Metallurgy
p.39

Features of Metallurgical Production in Small Foundries with Induction Furnaces
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Study of Abrasive Grains for Susceptibility to Electrostatic Field Effect
p.57

Comparison the Preparation Methods of Powder Feedstock for Laser Powder Bed Fusion
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HomeSolid State PhenomenaSolid State Phenomena Vol. 328Investigation of the Nature of Damage to Welded...

Investigation of the Nature of Damage to Welded Flexible Compensating Elements Made of Austenitic Stainless Steels

Abstract:

Welded flexible compensating elements made of austenitic stainless steels, such as metal hoses and bellows expansion joints, operate in a complex stress state; therefore, almost all corrosion damage of these products occurs in a stressed state. In addition, in welded joints, defects are possible associated with elastic-plastic deformations and stresses arising in the manufacturing process. Paper considers the defects of welded joints of multilayer bellows expansion joints made of stainless steels AISI 304 and AISI 316 types. The influence of the parameters of the argon tungsten electrode welding mode, with or without filler wire, on the mechanical characteristics of welded joints was studied. Mechanical tests of samples of welded joints were carried out on a tensile testing machine. The optimal range of variation of the parameters of the welding mode has been established, in which the plastic characteristics of the welded joints have maximum values. A metallographic study of the microstructure of welded joints of metal hoses and bellows expansion joints was carried out. The influence of the content of nonmetallic inclusions in the material of products on the conditions of melting and crystallization of the weld pool, contributing to the appearance of pores and hot cracks in the metal of the weld and the heat affected zone, has been established. To reduce the influence of the content of non-metallic inclusions in the weld metal and the heat-affected zone on the conditions of melting and crystallization of the weld pool, it is recommended to carry out preliminary heat treatment of the austenitic steel strip.

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Periodical:

Solid State Phenomena (Volume 328)

Pages:

9-16

DOI:

https://doi.org/10.4028/p-8y4hve

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Online since:

February 2022

Authors:

Vitaliy Ivanov, F.V. Morgay, Elena V. Lavrova, Dmitriy P. Il’yaschenko*, Elena Verkhoturova

Keywords:

Austenitic Stainless Steel, Durability, Flexible Compensating Elements, Local Corrosion Damage, Mechanical Tests, TIG-Welding

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