Investigation of Physiomechanical Properties and Temperatures of Transformation of Iron-based Alloys

DOI

10.2991/aime-17.2017.115How to use a DOI?

Keywords

alloys, properties, phase, austenite, martensite, structure.

Abstract

Investigations of powder alloys of the Fe- (30-36)% Ni system based on carbonyl powders are presented. When studying the microstructure of Fe-(30-36)%Ni alloys, it was found that an increase in the concentration of nickel promotes the coarsening of the average grain size of the austenite, and the grain coarsening promotesÿtheÿaccelerationÿofÿtheÿausteniticÿ-martensiticÿtransformation. In alloys with nickel content in the range of 30-32%, the phase transformation temperature increased with increasing a minimum grain size of martensite in direct proportion to the nickel content. The critical austenite grain size was 1-3.5 microns. It is established that the transformation in alloys with 30.3 - 31.93% of nickel occurs in a wide range of temperatures (70-120 degrees), and in alloys with 34.35-36.33% of nickel - in a narrow one (1-2 degrees). It is shown that as the nickel content increases from 30 to 36%, the grain size increases and the temperature of the phase of - transformation increases by 75 K. The fraction of martensite formed increases by a factor of 5. It was found that the decomposition of austenite in iron nickel alloys (30-32% Ni) was in the range of 70-92%, with a Ni content of 33-36%; the decomposition of austenite was insignificant: 2-15%. It was established that when the samples were cooled to 5 K in a field with a strength of 5 k , the value of the magnetization increased to 113-189 emu / g. It was found that a decrease in the critical grain size provokes the transformation in alloys.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - K.L. Saenkov
AU  - S.A. Oglezneva
PY  - 2017/07
DA  - 2017/07
TI  - Investigation of Physiomechanical Properties and Temperatures of Transformation of Iron-based Alloys
BT  - Proceedings of the International Conference "Actual Issues of Mechanical Engineering" 2017 (AIME 2017)
PB  - Atlantis Press
SP  - 708
EP  - 714
SN  - 2352-5401
UR  - https://doi.org/10.2991/aime-17.2017.115
DO  - 10.2991/aime-17.2017.115
ID  - Saenkov2017/07
ER  -