Structure and Phase Composition of 09G2S Steel Modified by Different Types of Welding

The paper presents the transmission electron microscopy (TEM) investigations of the structure and phase composition of the type 09G2S weld steel modified by four types of welding, namely: electrode welding and electropercussive welding both with and without the introduction of artificial flaws. Arti...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-10, Vol.253 (1), p.12018
Main Authors: Smirnov, Aleksandr N, Popova, Natal'ya A, Nikonenko, Elena L, Ozhiganov, Evgenii A, Ababkov, Nikolai V, Koneva, Nina A
Format: Article
Language:English
Subjects:
Aluminum
Base metal
Heat affected zone
High strength low alloy steels
Morphology
Phase composition
Residual stress
Transmission electron microscopy
Welding parameters
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Summary:The paper presents the transmission electron microscopy (TEM) investigations of the structure and phase composition of the type 09G2S weld steel modified by four types of welding, namely: electrode welding and electropercussive welding both with and without the introduction of artificial flaws. Artificial flows are aluminum pieces. TEM investigations are carried out within the heat-affected zone, i.e. between the deposited and base metal, at 0.5 mm distance to the former. Welding electrode of the type E50A is used for welding 09G2S steel specimens. It is shown how the type of welding affects the steel morphology, phase composition, defect structure and its parameters. After each type of welding, the dislocation structure is polarized. This, however, does not cause internal stresses which can destroy the specimen.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/253/1/012018