| Issue |
MATEC Web Conf.
Volume 129, 2017
International Conference on Modern Trends in Manufacturing Technologies and Equipment (ICMTMTE 2017)
|
|
|---|---|---|
| Article Number | 02045 | |
| Number of page(s) | 5 | |
| Section | Advanced Materials and Coatings | |
| DOI | https://doi.org/10.1051/matecconf/201712902045 | |
| Published online | 07 November 2017 | |
The evolution of the welded joints structure at low cycle fatigue
1
Orenburg State University, Orenburg, Russia
2
Ufa State Petroleum Technological University, Ufa, Russia
* Corresponding author: yarko.e@mail.ru
The effect of cyclic damage on the structure evolution and the change in the micro stresses of the crystal cell in characteristic zones of dissimilar welded joints of steels strength classes X60 and X70 is estimated. It is shown, that with increase in the number of loading cycles in less strong metal of the welded joint, relaxation of internal stresses, realized by splitting individual ambits of ferrite grain or by the initiation of micro cracks, is observed. The results of fractographic analysis of a less reliable weld zone at different levels of samples fractures of accumulated damage are presented.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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