The evolution of deformation structures of seam weld of stainless steel

V. V. Kibitkin, A. I. Solodushkin, V. S. Pleshanov, S. F. Gnyusov, D. N. Khatkov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The high-cyclic fatigue of welded joints of Fe-17Cr-0.8Ti-0.08C steel was investigated by digital image correlation technique. The lapped images of specimen surface were received with optical microscope (50×) and registered by camera to form a panorama. Four stages of deformation evolution are suggested: strain hardening (I), stable necking (II), unstable necking (III), and fatigue crack (IV). Displacement fields in the neck regions were approximated by linear functions to evaluate the mean deformation rate and displacement variance. The basic types of deformation structures and their evolution in base metal, HAZ and in weld are outlined. It is shown that the seam weld keeps some plasticity under fatigue. It was found that fatigue crack is being formed by plastic flow in base metal zone, and its life time is very short. The evolution of mean deformation and its variance are given.

Original languageEnglish
Title of host publicationProceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019
EditorsVictor E. Panin, Sergey G. Psakhie, Vasily M. Fomin
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735419124
DOIs
Publication statusPublished - 19 Nov 2019
EventInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019 - Tomsk, Russian Federation
Duration: 1 Oct 20195 Oct 2019

Publication series

NameAIP Conference Proceedings
Volume2167
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019
CountryRussian Federation
CityTomsk
Period1.10.195.10.19

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Kibitkin, V. V., Solodushkin, A. I., Pleshanov, V. S., Gnyusov, S. F., & Khatkov, D. N. (2019). The evolution of deformation structures of seam weld of stainless steel. In V. E. Panin, S. G. Psakhie, & V. M. Fomin (Eds.), Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019 [020158] (AIP Conference Proceedings; Vol. 2167). American Institute of Physics Inc.. https://doi.org/10.1063/1.5132025