Experimental study of cyclic creep and high-cycle fatigue of welded joints of St3 steel by the DIC technique

Journal Article · Tue Oct 27 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4932772· OSTI ID:22492537

Kibitkin, Vladimir V., E-mail: [e-mail]; Solodushkin, Andrey I., E-mail: [e-mail]; Pleshanov, Vasily S., E-mail: [e-mail] ^[1]

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1. Institute of Strength Physics and Materials Science SB RAS, Tomsk, 634055 (Russian Federation)

In the paper the mechanisms of plastic deformation and fracture of welded joints of steel St3 were investigated at high-cycle fatigue and cyclic creep by the digital image correlation (DIC) technique. The evolution of strain rate is studied for the following regions: base metal, HAZ, and fusion zone. This strain rate evolution can be considered as a mechanical response of material. Three stages of deformation evolution are shown: deformation hardening (I), fatigue crack initiation (II), and the last stage is related to main crack (III). Two criteria are offered to evaluate the current mechanical state of welded joints.

• OSTI ID: 22492537
• Journal Information: AIP Conference Proceedings, Vol. 1683, Issue 1; Conference: International conference on advanced materials with hierarchical structure for new technologies and reliable structures 2015, Tomsk (Russian Federation), 21-25 Sep 2015; Other Information: (c) 2015 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
CRACK PROPAGATION
CRACKS
CREEP
DEFORMATION
FATIGUE
FRACTURES
HARDENING
HEAT AFFECTED ZONE
IMAGES
PLASTICITY
STEELS
STRAIN RATE
WELDED JOINTS