Influence of deformation on structural-phase state of weld material in St3 steel

Journal Article · Fri Jan 15 00:00:00 EST 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4937819· OSTI ID:22494425

Smirnov, Alexander; Ababkov, Nicolay; Ozhiganov, Yevgeniy ^[1]; Kozlov, Eduard ^[1]; Popova, Natalya ^[1]; Nikonenko, Elena ^[1]; Zboykova, Nadezhda; Koneva, Nina ^[2]

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1. Kuzbass State Technical University, 25-54, Krasnaya Str., 650000, Kemerovo (Russian Federation)
2. Tomsk State University of Architecture and Building, 2, Solyanaya Sq., 634003, Tomsk (Russian Federation)

The structural-phase condition of the weld material subjected to the plastic deformation was investigated using the translucent diffraction electron microscopy method. The investigations were carried out near the joint of the weld and the base metal. The seam was done by the method of manual arc welding without artificial defects. The St3 steel was taken as the welded material. Influence of the plastic deformation on morphology, phase composition, defect structure and its parameters of weld metal was revealed. All investigations were done at the distance of 0.5 mm from the joint of the weld and the base metal at the deformation degrees from 0 to 5% and after destruction of a sample. It was established that deformation of the sample did not lead to qualitative changes in the structure (the structure is still presented by ferrite-pearlite mixture) but changed the quantitative parameters of the structure, namely, with the increase of plastic deformation a part of the pearlite component becomes more and more imperfect. In the beginning it turns into the destroyed pearlite then into ferrite, the volume fraction of pearlite is decreased. The polarization of dislocation structure takes place but it doesn’t lead to the internal stresses that can destroy the sample.

• OSTI ID: 22494425
• Journal Information: AIP Conference Proceedings, Vol. 1698, Issue 1; Conference: AMTC-2015: 2. all-Russian scientific conference of young scientists on advanced materials in technology and construction, Tomsk (Russian Federation), 6-9 Oct 2015; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ARC WELDING
DEFECTS
DEFORMATION
DISLOCATIONS
DISTANCE
ELECTRON DIFFRACTION
ELECTRON MICROSCOPY
FERRITE
MIXTURES
MORPHOLOGY
PEARLITE
PLASTICITY
POLARIZATION
RESIDUAL STRESSES
STEELS
WELDED JOINTS