Empress Catherine II Saint Petersburg Mining University (Saint Petersburg, Russia)

A. Yu. Kuzkin*, Cand. Eng., Associate Prof., Dept. of Mechanical Engineering, e-mail: Kuzkin_AYu@pers.spmi.ru
D. A. Zadkov, Cand. Eng., Associate Prof., Dept. of Mechanical Engineering, e-mail: Zadkov_DA@pers.spmi.ru

Novosibirsk State Technical University (Novosibirsk, Russia)

V. Yu. Skeeba, Cand. Eng., Associate Prof., Dept. of Industrial Machinery Design, e-mail: skeeba_vadim@mail.ru

Reshetnev Siberian State University of Science and Technology (Krasnoyarsk, Russia)¹ ; Siberian Federal University (Krasnoyarsk, Russia)² ; Bauman Moscow State Technical University (Moscow, Russia)³

V. V. Kukartsev, Cand. Eng., Associate Prof., Dept. of Information Economic Systems, Institute of Engineering and Economics¹, Dept. of Software Engineering, Institute of Space and Information Technologies², Artificial Intelligence Technology Scientific and Education Center³, e-mail: vlad_saa_2000@mail.ru

Siberian Federal University (Krasnoyarsk, Russia)¹ ; Bauman Moscow State Technical University (Moscow, Russia)²

Ya. A. Tynchenko, Junior Researcher, Lab. of Biofuel Compositions¹, Artificial Intelligence Technology Scientific and Education Center², e-mail: t080801@yandex.ru

* Corresponding author

Mechanical processing of Chromium-nickel steel machining (cutting, pressure treatment) is impossible without taking into account their short-term creep and ductility properties. The purpose of this work is to study the formation and deformation development under short-term creep and constant effective stresses. The results of experimental tests of chromium-nickel steel 12Kh18N10Т for short-term creep at room temperature are presented. A distinctive feature of the tests is the short-term creep in a wide range of stresses study: from the initial creep limit to the material destruction. The experiments were carried out under conditions of a stepwise increasing load (liquid pressure in a closed pipe) at a constant intensity of true stresses at each stage. It is shown that the conditions for changing the load, which ensure the constancy of the stress intensity, are violated at a sufficiently high voltage. Methods for separating the deformation into a plastic component and a component from short-term creep are proposed, which can be used both under conditions of stepped loading and under continuous loading. Examples of the occurrence and deformation development during short-term creep under conditions of decreasing stress are given.

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