Transformation of ε-martensite in auustenite fe-cr-ni steel under the influence of temperature and deformation

Authors

  • G. V. Snizhnoi Ph. D. (Phys. and Math.), Ukraine

Keywords:

austenite, -martensite,  -martensite, magnetic susceptibility, chromium-nickel steel

Abstract

Abstract. Purpose. The behavior of the formed - and  - martensites in austenitic Fe-Cr-Ni steels under the influence of temperature and deformation is investigated. Methodology. To find the specific magnetic susceptibility, a magnitometric weighingmachine with a microprocessor system was used. A low amount of  - martensite (from 0.005%) was determined by a sensitive magnitometric method. This method the effect of the magnetization of the paramagnetic matrix takes into account. Findings. A phase transition of the first kind of deformed austenite in simultaneously appearing  - and  -martensites at a certain uniaxial plastic deformation by compression was detected. The phase transformation according to scheme ) (max0     is realized (where: 0   initial state of fully austenitic steel,    intermediate values of deformed austenite, max    maximum value of deformed austenite). This phase transformation by a jump in the specific magnetic susceptibility from max   to the total value of )(        is determined (where:  ,  and    specific magnetic susceptibilities of deformed austenite  ,  - and  –  martensite, respectively). Originality. For steel 10Х16Н13, the temperature and deformation regions of the existence of  martensite were detected. In this steel, during plastic deformation, structural-phase transformations and changes in the atomicmagnetic state of austenite due to distortion of the fcc lattice occur. Practical value. The above results for studying the effect of the  -phase on the mechanical and service properties of austenitic Fe-Cr-Ni steels can be used.

Author Biography

G. V. Snizhnoi, Ph. D. (Phys. and Math.)

Department of micro- and nanoelectronics, State Higher Education Establishment “Zaporizhzhya National Technical University”, 64, Zhukovskogo str., Zaporizhzhya, 69063, Ukraine

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Published

2017-03-28

Issue

Section

Proceedings in memory of Starodubov