MECHANICAL BEHAVIOR OF 04H20N6G11M2AFB NITROGEN AUSTENIC STEEL DURING STATIC TENSION WITHIN THE TEMPERATURE INTERVAL FROM −70 TO +140 ºС


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Abstract

The introduction of strong concentrations of nitrogen into the austenic steels of various alloying systems allows achievement of high performance of strength, plasticity, rust-resistance and tribological properties. The use of metal goods and structures under the low temperatures conditions increases the risk of their brittle fracture during various types of volume and contact loading. However, until the present, the mechanical properties (including plasticity, viscosity, crack resistance) of nitrogen steels under the low temperature tests were studied not as carefully as they were studied at room temperature. The paper presents the set of studies on the determination of mechanical properties and the fractographic investigation of special features of the structure destruction and evolution during the tension tests of 04H20N6G11M2AFB rust-resisting nitrogen steel with austenic structure under the temperature from −70 to +140 °С. The authors disclosed a new phenomenon of more intensive growth of strength characteristics of 04H20N6G11M2AFB steel under the static tension tests conditions while lowering test temperature in the interval from +50 to −70 °С in comparison with the strengthening while lowering test temperature within the range of higher temperatures (from +140 to +50 °С) at some simultaneous increase of values of plasticity characteristics under the tension test conditions at the temperature lower than +20 °С compared with tests at higher temperatures. The authors determined the retention of ductile fracture behavior of 04H20N6G11M2AFB steel while lowering tension test temperature up to −70 °С that corresponds to the lower interval limit of the negative climatic temperatures.  

About the authors

Roman Anatolievich Savray

Institute of Machine Science of Ural Branch of the Russian Academy of Sciences, Yekaterinburg

Author for correspondence.
Email: ras@imach.uran.ru

PhD (Engineering), Head of laboratory of structural material science

Russian Federation

Aleksey Viktorovich Makarov

M.N. Mikheev Institute of Metal Physics Ural Branch of the Russian Academy of Sciences, Yekaterinburg

Email: avm@imp.uran.ru

Doctor of Sciences (Engineering), Head of Department of material science, Head of Laboratory of mechanical

Russian Federation

Eduard Stepanovich Gorkunov

Institute of Machine Science of Ural Branch of the Russian Academy of Sciences, Yekaterinburg

Email: ges@imach.uran.ru

Academician of RAS, Doctor of Sciences (Engineering), Professor, chief researcher

Russian Federation

Nina Leonidovna Pecherkina

M.N. Mikheev Institute of Metal Physics Ural Branch of the Russian Academy of Sciences, Yekaterinburg

Email: pecherkina@imp.uran.ru

senior researcher

Russian Federation

Svetlana Aleksandrovna Rogovaya

Institute of Machine Science of Ural Branch of the Russian Academy of Sciences, Yekaterinburg

Email: rogovaya@imach.uran.ru

junior researcher

Russian Federation

Alevtina Leontievna Osintseva

Institute of Machine Science of Ural Branch of the Russian Academy of Sciences, Yekaterinburg

Email: osintseva@imach.uran.ru

PhD (Engineer), senior researcher

Russian Federation

Grigory Yurievich Kalinin

Central Research Institute of Structural Materials “Prometey”, Saint Petersburg

Email: npk3@crism.ru

PhD (Engineering), Head of Laboratory

Russian Federation

Svetlana Yurievna Mushnikova

Central Research Institute of Structural Materials “Prometey”, Saint Petersburg

Email: npk3@crism.ru

PhD (Engineering), Head of sector

Russian Federation

References

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