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55 years of the Department of Materials Science and Materials Technology of Orenburg State University
Название Influence of the heating force in rotational friction welding on mechanical properties and tensile fracture mechanism of dissimilar welded joints of 30KhGSA and 40KhMFA steels
DOI 10.17580/chm.2022.12.07
Автор E. A. Kuzmina, E. Yu. Priymak, A. S. Kirilenko, Ya. S. Syomka
Информация об авторе

Orenburg State University, Orenburg, Russia1 ; JSC Drilling Equipment Plant, Orenburg, Russia2:

E. A. Kuzmina, Postgraduate Student1, Head of the Technical Department2, e-mail: kuzmina0902@yandex.ru

E. Yu. Priymak, Cand. Eng., Associate Prof., Dept. of Materials Science and Technology1, Head of the Laboratory of Metal Science and Heat Treatment2
Ya. S. Syomka, Postgraduate Student1, Design Engineer2

Orenburg State University, Orenburg, Russia:

A. S. Kirilenko, Cand. Eng., Senior Lecturer

Реферат

This article presents the results of evaluating the effect of heating force, as one of the parameters of rotational friction welding, on the mechanical properties and mechanism of tensile failure of dissimilar welded joints of medium-carbon steels 30KhGSA and 40KhMFA. The results of studies of the microstructure and microhardness of welded joints are presented. The fracture mechanism of welded specimens during tensile testing was evaluated on the basis of strain distribution maps obtained by the digital image correlation method and the results of fractographic analysis. The features of the development of deformation and failure of welded joints obtained at different heating forces are shown. From the point of view of the equal strength of the structure with a welded joint the optimal values of this parameter of rotary friction welding for joining steels 30KhGSA and 40KhMFA are recommended.
The reported study was funded by RFBR according to the research project № 20-38-90032.
When conducting mechanical tensile tests and studying the distribution of deformation fields, equipment was used that is part of the Plastometriya collective centre of the IES named after E. S. Gorkunova of the Ural branch of the RAS

Ключевые слова Rotary friction welding (RFW), exploration drill pipes, welded joint, thermomechanical affected zone (TMAZ), mechanical properties, digital image correlation method, failure mechanism
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